diff --git a/.eslintrc.json b/.eslintrc.json
index eab09b41..a4132990 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -39,6 +39,7 @@
     "@typescript-eslint/no-var-requires": "off",
     "@typescript-eslint/triple-slash-reference": "off",
     "@typescript-eslint/no-inferrable-types": "off",
+    "@typescript-eslint/no-empty-interface": ["error", { "allowSingleExtends": true }],
     "camelcase": "off",
     "class-methods-use-this": "off",
     "dot-notation": "off",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index adcfa6de..24f99635 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,7 @@
   
 ## Changelog
   
-### **HEAD -> main** 2021/10/23 mandic00@live.com
+### **HEAD -> main** 2021/10/25 mandic00@live.com
 
 - time based caching
 - turn on minification
diff --git a/TODO.md b/TODO.md
index 4ed8aa55..b7a4086f 100644
--- a/TODO.md
+++ b/TODO.md
@@ -53,13 +53,16 @@ Object detection using CenterNet or NanoDet models is not working when using WAS
 ## Pending Release
 
 - Update to TFJS 3.10.0
+- Update to Node v17 for Dev environment
 - Time based caching
 - Multiple bug fixes
 - Utility class `human.env`
 - Add `skipTime` in addition to `skipFrames`
 - Updated configuration default values
 - Updated TS typings
+- Updated JSDoc comments and **TypeDoc** documentation
 - Enhanced **MoveNet** post-processing
+- Increase `human.similarity` resolution
 - Add optional **Anti-Spoof** module
 - Remove old **HandDetect** and **PoseNet** models from default installation
 - Refactor **ImageFX** module
diff --git a/demo/index.js b/demo/index.js
index 1875f21f..cdb4f751 100644
--- a/demo/index.js
+++ b/demo/index.js
@@ -1016,7 +1016,7 @@ async function main() {
 
   // create instance of human
   human = new Human(userConfig);
-  human.env.perfadd = true;
+  // human.env.perfadd = true;
 
   log('human version:', human.version);
   // we've merged human defaults with user config and now lets store it back so it can be accessed by methods such as menu
diff --git a/package.json b/package.json
index 8340086e..e92e4986 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "@tensorflow/tfjs-layers": "^3.10.0",
     "@tensorflow/tfjs-node": "^3.10.0",
     "@tensorflow/tfjs-node-gpu": "^3.10.0",
-    "@types/node": "^16.11.4",
+    "@types/node": "^16.11.5",
     "@typescript-eslint/eslint-plugin": "^5.1.0",
     "@typescript-eslint/parser": "^5.1.0",
     "@vladmandic/build": "^0.6.3",
diff --git a/src/config.ts b/src/config.ts
index 5f03b521..1c202181 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -1,57 +1,57 @@
 /* eslint-disable indent */
 /* eslint-disable no-multi-spaces */
 
+/** Generic config type inherited by all module types */
 export interface GenericConfig {
+  /** @property is module enabled? */
   enabled: boolean,
+  /** @property path to model json file */
   modelPath: string,
+  /** @property how many max frames to go without re-running model if cached results are acceptable */
   skipFrames: number,
+  /** @property how many max miliseconds to go without re-running model if cached results are acceptable */
   skipTime: number,
 }
 
 /** Dectector part of face configuration */
 export interface FaceDetectorConfig extends GenericConfig {
+  /** @property is face rotation correction performed after detecting face? */
   rotation: boolean,
+  /** @property maximum number of detected faces */
   maxDetected: number,
+  /** @property minimum confidence for a detected face before results are discarded */
   minConfidence: number,
+  /** @property minimum overlap between two detected faces before one is discarded */
   iouThreshold: number,
+  /** @property should face detection return face tensor to be used in some other extenrnal model? */
   return: boolean,
 }
 
 /** Mesh part of face configuration */
-export type FaceMeshConfig = GenericConfig
+export interface FaceMeshConfig extends GenericConfig {}
 
 /** Iris part of face configuration */
-export type FaceIrisConfig = GenericConfig
+export interface FaceIrisConfig extends GenericConfig {}
 
 /** Description or face embedding part of face configuration
  * - also used by age and gender detection
  */
 export interface FaceDescriptionConfig extends GenericConfig {
+  /** @property minimum confidence for a detected face before results are discarded */
   minConfidence: number,
 }
 
 /** Emotion part of face configuration */
 export interface FaceEmotionConfig extends GenericConfig {
+  /** @property minimum confidence for a detected face before results are discarded */
   minConfidence: number,
 }
 
-/** Emotion part of face configuration */
-export type FaceAntiSpoofConfig = GenericConfig
+/** Anti-spoofing part of face configuration */
+export interface FaceAntiSpoofConfig extends GenericConfig {}
 
-/** Controlls and configures all face-specific options:
- * - face detection, face mesh detection, age, gender, emotion detection and face description
- *
- * Parameters:
- * - enabled: true/false
- * - modelPath: path for each of face models
- * - minConfidence: threshold for discarding a prediction
- * - iouThreshold: ammount of overlap between two detected objects before one object is removed
- * - maxDetected: maximum number of faces detected in the input, should be set to the minimum number for performance
- * - rotation: use calculated rotated face image or just box with rotation as-is, false means higher performance, but incorrect mesh mapping on higher face angles
- * - return: return extracted face as tensor for futher user processing, in which case user is reponsible for manually disposing the tensor
-*/
-export interface FaceConfig {
-  enabled: boolean,
+/** Configures all face-specific options: face detection, mesh analysis, age, gender, emotion detection and face description */
+export interface FaceConfig extends GenericConfig {
   detector: Partial<FaceDetectorConfig>,
   mesh: Partial<FaceMeshConfig>,
   iris: Partial<FaceIrisConfig>,
@@ -60,92 +60,58 @@ export interface FaceConfig {
   antispoof: Partial<FaceAntiSpoofConfig>,
 }
 
-/** Controlls and configures all body detection specific options
- *
- * Parameters:
- * - enabled: true/false
- * - modelPath: body pose model, can be absolute path or relative to modelBasePath
- * - minConfidence: threshold for discarding a prediction
- * - maxDetected: maximum number of people detected in the input, should be set to the minimum number for performance
- * - detector: optional body detector
- *
- * `maxDetected` is valid for `posenet` and `movenet-multipose` as other models are single-pose only
- * `maxDetected` can be set to -1 to auto-detect based on number of detected faces
- *
- * Changing `modelPath` will change module responsible for hand detection and tracking
- * Allowed values are `posenet.json`, `blazepose.json`, `efficientpose.json`, `movenet-lightning.json`, `movenet-thunder.json`, `movenet-multipose.json`
-*/
+/** Configures all body detection specific options */
 export interface BodyConfig extends GenericConfig {
+  /** @property maximum numboer of detected bodies */
   maxDetected: number,
+  /** @property minimum confidence for a detected body before results are discarded */
   minConfidence: number,
   detector?: {
+    /** @property path to optional body detector model json file */
     modelPath: string
   },
 }
 
-/** Controls and configures all hand detection specific options
- *
- * Parameters:
- * - enabled: true/false
- * - landmarks: detect hand landmarks or just hand boundary box
- * - modelPath: paths for hand detector and hand skeleton models, can be absolute path or relative to modelBasePath
- * - minConfidence: threshold for discarding a prediction
- * - iouThreshold: ammount of overlap between two detected objects before one object is removed
- * - maxDetected: maximum number of hands detected in the input, should be set to the minimum number for performance
- * - rotation: use best-guess rotated hand image or just box with rotation as-is, false means higher performance, but incorrect finger mapping if hand is inverted
- *
- * `maxDetected` can be set to -1 to auto-detect based on number of detected faces
- *
- * Changing `detector.modelPath` will change module responsible for hand detection and tracking
- * Allowed values are `handdetect.json` and `handtrack.json`
-*/
+/** Configures all hand detection specific options */
 export interface HandConfig extends GenericConfig {
+  /** @property should hand rotation correction be performed after hand detection? */
   rotation: boolean,
+  /** @property minimum confidence for a detected hand before results are discarded */
   minConfidence: number,
+  /** @property minimum overlap between two detected hands before one is discarded */
   iouThreshold: number,
+  /** @property maximum number of detected hands */
   maxDetected: number,
+  /** @property should hand landmarks be detected or just return detected hand box */
   landmarks: boolean,
   detector: {
+    /** @property path to hand detector model json */
     modelPath?: string,
   },
   skeleton: {
+    /** @property path to hand skeleton model json */
     modelPath?: string,
   },
 }
 
-/** Controlls and configures all object detection specific options
- * - enabled: true/false
- * - modelPath: object detection model, can be absolute path or relative to modelBasePath
- * - minConfidence: minimum score that detection must have to return as valid object
- * - iouThreshold: ammount of overlap between two detected objects before one object is removed
- * - maxDetected: maximum number of detections to return
- *
- * Changing `modelPath` will change module responsible for hand detection and tracking
- * Allowed values are `mb3-centernet.json` and `nanodet.json`
-*/
+/** Configures all object detection specific options */
 export interface ObjectConfig extends GenericConfig {
+  /** @property minimum confidence for a detected objects before results are discarded */
   minConfidence: number,
+  /** @property minimum overlap between two detected objects before one is discarded */
   iouThreshold: number,
+  /** @property maximum number of detected objects */
   maxDetected: number,
 }
 
-/** Controlls and configures all body segmentation module
+/** Configures all body segmentation module
  * removes background from input containing person
  * if segmentation is enabled it will run as preprocessing task before any other model
  * alternatively leave it disabled and use it on-demand using human.segmentation method which can
  * remove background or replace it with user-provided background
- *
- * - enabled: true/false
- * - modelPath: object detection model, can be absolute path or relative to modelBasePath
- * - blur: blur segmentation output by <number> pixels for more realistic image
- *
- * Changing `modelPath` will change module responsible for hand detection and tracking
- * Allowed values are `selfie.json` and `meet.json`
-
 */
-export interface SegmentationConfig {
-  enabled: boolean,
-  modelPath: string,
+export interface SegmentationConfig extends GenericConfig {
+  /** @property blur segmentation output by <number> pixels for more realistic image */
   blur: number,
 }
 
@@ -154,6 +120,7 @@ export interface SegmentationConfig {
  * - image filters run with near-zero latency as they are executed on the GPU using WebGL
 */
 export interface FilterConfig {
+  /** @property are image filters enabled? */
   enabled: boolean,
   /** Resize input width
   * - if both width and height are set to 0, there is no resizing
@@ -167,40 +134,41 @@ export interface FilterConfig {
   * - if both are set, values are used as-is
   */
   height: number,
-  /** Return processed canvas imagedata in result */
+  /** @property return processed canvas imagedata in result */
   return: boolean,
-  /** Flip input as mirror image */
+  /** @property flip input as mirror image */
   flip: boolean,
-  /** Range: -1 (darken) to 1 (lighten) */
+  /** @property range: -1 (darken) to 1 (lighten) */
   brightness: number,
-  /** Range: -1 (reduce contrast) to 1 (increase contrast) */
+  /** @property range: -1 (reduce contrast) to 1 (increase contrast) */
   contrast: number,
-  /** Range: 0 (no sharpening) to 1 (maximum sharpening) */
+  /** @property range: 0 (no sharpening) to 1 (maximum sharpening) */
   sharpness: number,
-  /** Range: 0 (no blur) to N (blur radius in pixels) */
+  /** @property range: 0 (no blur) to N (blur radius in pixels) */
   blur: number
-  /** Range: -1 (reduce saturation) to 1 (increase saturation) */
+  /** @property range: -1 (reduce saturation) to 1 (increase saturation) */
   saturation: number,
-  /** Range: 0 (no change) to 360 (hue rotation in degrees) */
+  /** @property range: 0 (no change) to 360 (hue rotation in degrees) */
   hue: number,
-  /** Image negative */
+  /** @property image negative */
   negative: boolean,
-  /** Image sepia colors */
+  /** @property image sepia colors */
   sepia: boolean,
-  /** Image vintage colors */
+  /** @property image vintage colors */
   vintage: boolean,
-  /** Image kodachrome colors */
+  /** @property image kodachrome colors */
   kodachrome: boolean,
-  /** Image technicolor colors */
+  /** @property image technicolor colors */
   technicolor: boolean,
-  /** Image polaroid camera effect */
+  /** @property image polaroid camera effect */
   polaroid: boolean,
-  /** Range: 0 (no pixelate) to N (number of pixels to pixelate) */
+  /** @property range: 0 (no pixelate) to N (number of pixels to pixelate) */
   pixelate: number,
 }
 
 /** Controlls gesture detection */
 export interface GestureConfig {
+  /** @property is gesture detection enabled? */
   enabled: boolean,
 }
 
@@ -257,11 +225,7 @@ export interface Config {
   /** Internal Variable */
   skipAllowed: boolean;
 
-  /** Run input through image filters before inference
-   * - image filters run with near-zero latency as they are executed on the GPU
-   *
-   * {@link FilterConfig}
-  */
+  /** {@link FilterConfig} */
   filter: Partial<FilterConfig>,
 
   /** {@link GestureConfig} */
@@ -283,10 +247,7 @@ export interface Config {
   segmentation: Partial<SegmentationConfig>,
 }
 
-/**
- * [See all default Config values...](https://github.com/vladmandic/human/blob/main/src/config.ts#L244)
- *
- */
+/** - [See all default Config values...](https://github.com/vladmandic/human/blob/main/src/config.ts#L250) */
 const config: Config = {
   backend: '',               // select tfjs backend to use, leave empty to use default backend
                              // for browser environments: 'webgl', 'wasm', 'cpu', or 'humangl' (which is a custom version of webgl)
diff --git a/src/exports.ts b/src/exports.ts
new file mode 100644
index 00000000..417e13ca
--- /dev/null
+++ b/src/exports.ts
@@ -0,0 +1,36 @@
+import type { Tensor } from './tfjs/types';
+import type { env } from './util/env';
+
+export * from './config';
+export * from './result';
+
+export type { Tensor } from './tfjs/types';
+export type { DrawOptions } from './util/draw';
+export type { Descriptor } from './face/match';
+export type { Box, Point } from './result';
+export type { Models } from './models';
+export type { Env } from './util/env';
+export type { FaceGesture, BodyGesture, HandGesture, IrisGesture } from './gesture/gesture';
+export { env } from './util/env';
+
+/** Events dispatched by `human.events`
+ * - `create`: triggered when Human object is instantiated
+ * - `load`: triggered when models are loaded (explicitly or on-demand)
+ * - `image`: triggered when input image is processed
+ * - `result`: triggered when detection is complete
+ * - `warmup`: triggered when warmup is complete
+ */
+export type Events = 'create' | 'load' | 'image' | 'result' | 'warmup' | 'error';
+
+/** Defines all possible canvas types */
+export type AnyCanvas = HTMLCanvasElement | OffscreenCanvas;
+/** Defines all possible image types */
+export type AnyImage = HTMLImageElement | typeof Image
+/** Defines all possible video types */
+export type AnyVideo = HTMLMediaElement | HTMLVideoElement
+/** Defines all possible image objects */
+export type ImageObjects = ImageData | ImageBitmap
+/** Defines possible externally defined canvas */
+export type ExternalCanvas = typeof env.Canvas;
+/** Defines all possible input types for **Human** detection */
+export type Input = Tensor | AnyCanvas | AnyImage | AnyVideo | ImageObjects | ExternalCanvas;
diff --git a/src/face/match.ts b/src/face/match.ts
index ee9e7631..63692217 100644
--- a/src/face/match.ts
+++ b/src/face/match.ts
@@ -1,15 +1,13 @@
-/** Defines Descriptor type */
+/** Face descriptor type as number array */
 export type Descriptor = Array<number>
 
 /** Calculates distance between two descriptors
- *  - Minkowski distance algorithm of nth order if `order` is different than 2
- *  - Euclidean distance if `order` is 2 (default)
- *
- * Options:
- * - `order`
- * - `multiplier` factor by how much to enhance difference analysis in range of 1..100
- *
- * Note: No checks are performed for performance reasons so make sure to pass valid number arrays of equal length
+ * @param {object} options
+ * @param {number} options.order algorithm to use
+ * - Euclidean distance if `order` is 2 (default), Minkowski distance algorithm of nth order if `order` is higher than 2
+ * @param {number} options.multiplier by how much to enhance difference analysis in range of 1..100
+ * - default is 20 which normalizes results to similarity above 0.5 can be considered a match
+ * @returns {number}
  */
 export function distance(descriptor1: Descriptor, descriptor2: Descriptor, options = { order: 2, multiplier: 20 }) {
   // general minkowski distance, euclidean distance is limited case where order is 2
@@ -21,7 +19,13 @@ export function distance(descriptor1: Descriptor, descriptor2: Descriptor, optio
   return (options.multiplier || 20) * sum;
 }
 
-/** Calculates normalized similarity between two descriptors based on their `distance`
+/** Calculates normalized similarity between two face descriptors based on their `distance`
+ * @param {object} options
+ * @param {number} options.order algorithm to use
+ * - Euclidean distance if `order` is 2 (default), Minkowski distance algorithm of nth order if `order` is higher than 2
+ * @param {number} options.multiplier by how much to enhance difference analysis in range of 1..100
+ * - default is 20 which normalizes results to similarity above 0.5 can be considered a match
+ * @returns {number} similarity between two face descriptors normalized to 0..1 range where 0 is no similarity and 1 is perfect similarity
  */
 export function similarity(descriptor1: Descriptor, descriptor2: Descriptor, options = { order: 2, multiplier: 20 }) {
   const dist = distance(descriptor1, descriptor2, options);
@@ -33,13 +37,10 @@ export function similarity(descriptor1: Descriptor, descriptor2: Descriptor, opt
 /** Matches given descriptor to a closest entry in array of descriptors
  * @param descriptor face descriptor
  * @param descriptors array of face descriptors to commpare given descriptor to
- *
- * Options:
- * - `threshold` match will return result first result for which {@link distance} is below `threshold` even if there may be better results
- * - `order` see {@link distance} method
- * - `multiplier` see {@link distance} method
- *
- * @returns object with index, distance and similarity
+ * @param {object} options
+ * @param {number} options.order see {@link similarity}
+ * @param {number} options.multiplier see {@link similarity}
+ * @returns {object}
  * - `index` index array index where best match was found or -1 if no matches
  * - {@link distance} calculated `distance` of given descriptor to the best match
  * - {@link similarity} calculated normalized `similarity` of given descriptor to the best match
diff --git a/src/human.ts b/src/human.ts
index 736792f2..1338aa42 100644
--- a/src/human.ts
+++ b/src/human.ts
@@ -1,5 +1,6 @@
 /**
  * Human main module
+ * @author <https://github.com/vladmandic>
  */
 
 // module imports
@@ -30,56 +31,23 @@ import * as persons from './util/persons';
 import * as posenet from './body/posenet';
 import * as segmentation from './segmentation/segmentation';
 import * as warmups from './warmup';
-
 // type definitions
-import type { Result, FaceResult, HandResult, BodyResult, ObjectResult, GestureResult, PersonResult } from './result';
-import type { Tensor } from './tfjs/types';
-import type { DrawOptions } from './util/draw';
-import type { Input } from './image/image';
-import type { Config } from './config';
+import type { Input, Tensor, DrawOptions, Config, Result, FaceResult, HandResult, BodyResult, ObjectResult, GestureResult, PersonResult } from './exports';
+// type exports
+export * from './exports';
 
-/** Defines configuration options used by all **Human** methods */
-export * from './config';
-
-/** Defines result types returned by all **Human** methods */
-export * from './result';
-
-/** Defines DrawOptions used by `human.draw.*` methods */
-export type { DrawOptions } from './util/draw';
-export { env, Env } from './util/env';
-
-/** Face descriptor type as number array */
-export type { Descriptor } from './face/match';
-
-/** Box and Point primitives */
-export { Box, Point } from './result';
-
-/** Defines all possible models used by **Human** library */
-export { Models } from './models';
-
-/** Defines all possible input types for **Human** detection */
-export { Input } from './image/image';
-
-/** Events dispatched by `human.events`
- *
- * - `create`: triggered when Human object is instantiated
- * - `load`: triggered when models are loaded (explicitly or on-demand)
- * - `image`: triggered when input image is processed
- * - `result`: triggered when detection is complete
- * - `warmup`: triggered when warmup is complete
- */
-export type Events = 'create' | 'load' | 'image' | 'result' | 'warmup' | 'error';
-
-/** Error message
- * @typedef Error Type
- */
-export type Error = { error: string };
-
-/** Instance of TensorFlow/JS
- * @external
+/** Instance of TensorFlow/JS used by Human
+ * - Can be TFJS that is bundled with `Human` or a manually imported TFJS library
+ * @external [API](https://js.tensorflow.org/api/latest/)
  */
 export type TensorFlow = typeof tf;
 
+/** Error message */
+export type Error = {
+  /** @property error message */
+  error: string,
+};
+
 /** **Human** library main class
  *
  * All methods and properties are available only as members of Human class
@@ -89,21 +57,19 @@ export type TensorFlow = typeof tf;
  * - Possible inputs: {@link Input}
  *
  * @param userConfig: {@link Config}
- * @return instance
+ * @returns instance of {@link Human}
  */
 export class Human {
   /** Current version of Human library in *semver* format */
   version: string;
 
   /** Current configuration
-   * - Definition: {@link Config}
-   * - Defaults: [config](https://github.com/vladmandic/human/blob/main/src/config.ts#L292)
+   * - Defaults: [config](https://github.com/vladmandic/human/blob/main/src/config.ts#L250)
    */
   config: Config;
 
   /** Last known result of detect run
    * - Can be accessed anytime after initial detection
-   * - Definition: {@link Result}
   */
   result: Result;
 
@@ -128,12 +94,7 @@ export class Human {
   env: Env;
 
   /** Draw helper classes that can draw detected objects on canvas using specified draw
-   * - options: {@link DrawOptions} global settings for all draw operations, can be overriden for each draw method
-   * - face: draw detected faces
-   * - body: draw detected people and body parts
-   * - hand: draw detected hands and hand parts
-   * - canvas: draw processed canvas which is a processed copy of the input
-   * - all: meta-function that performs: canvas, face, body, hand
+   * @property options global settings for all draw operations, can be overriden for each draw method {@link DrawOptions}
    */
   draw: { canvas: typeof draw.canvas, face: typeof draw.face, body: typeof draw.body, hand: typeof draw.hand, gesture: typeof draw.gesture, object: typeof draw.object, person: typeof draw.person, all: typeof draw.all, options: DrawOptions };
 
@@ -144,7 +105,7 @@ export class Human {
   models: models.Models;
 
   /** Container for events dispatched by Human
-   *
+   * {@type} EventTarget
    * Possible events:
    * - `create`: triggered when Human object is instantiated
    * - `load`: triggered when models are loaded (explicitly or on-demand)
@@ -169,9 +130,8 @@ export class Human {
 
   /** Constructor for **Human** library that is futher used for all operations
    *
-   * @param userConfig: {@link Config}
-   *
-   * @return instance: {@link Human}
+   * @param {Config} userConfig
+   * @returns {Human}
    */
   constructor(userConfig?: Partial<Config>) {
     this.env = env;
@@ -269,6 +229,7 @@ export class Human {
   /** Process input as return canvas and tensor
    *
    * @param input: {@link Input}
+   * @param {boolean} input.getTensor should image processing also return tensor or just canvas
    * @returns { tensor, canvas }
    */
   image(input: Input, getTensor: boolean = true) {
@@ -276,17 +237,17 @@ export class Human {
   }
 
   /** Segmentation method takes any input and returns processed canvas with body segmentation
-   *  - Optional parameter background is used to fill the background with specific input
    *  - Segmentation is not triggered as part of detect process
    *
    *  Returns:
-   *  - `data` as raw data array with per-pixel segmentation values
-   *  - `canvas` as canvas which is input image filtered with segementation data and optionally merged with background image. canvas alpha values are set to segmentation values for easy merging
-   *  - `alpha` as grayscale canvas that represents segmentation alpha values
    *
    * @param input: {@link Input}
    * @param background?: {@link Input}
-   * @returns { data, canvas, alpha }
+   *  - Optional parameter background is used to fill the background with specific input
+   * @returns {object}
+   *  - `data` as raw data array with per-pixel segmentation values
+   *  - `canvas` as canvas which is input image filtered with segementation data and optionally merged with background image. canvas alpha values are set to segmentation values for easy merging
+   *  - `alpha` as grayscale canvas that represents segmentation alpha values
    */
   async segmentation(input: Input, background?: Input): Promise<{ data: number[], canvas: HTMLCanvasElement | OffscreenCanvas | null, alpha: HTMLCanvasElement | OffscreenCanvas | null }> {
     return segmentation.process(input, background, this.config);
@@ -307,7 +268,7 @@ export class Human {
    *  - Call to explictly register and initialize TFJS backend without any other operations
    *  - Use when changing backend during runtime
    *
-   * @return Promise<void>
+   * @returns {void}
    */
   async init(): Promise<void> {
     await backend.check(this, true);
diff --git a/src/image/image.ts b/src/image/image.ts
index 0ffe272a..921b4d20 100644
--- a/src/image/image.ts
+++ b/src/image/image.ts
@@ -4,14 +4,10 @@
 
 import * as tf from '../../dist/tfjs.esm.js';
 import * as fxImage from './imagefx';
-import type { Tensor } from '../tfjs/types';
-import type { Config } from '../config';
+import type { Input, AnyCanvas, Tensor, Config } from '../exports';
 import { env } from '../util/env';
 import { log, now } from '../util/util';
 
-export type Input = Tensor | ImageData | ImageBitmap | HTMLImageElement | HTMLMediaElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | typeof Image | typeof env.Canvas;
-export type AnyCanvas = HTMLCanvasElement | OffscreenCanvas;
-
 const maxSize = 2048;
 // internal temp canvases
 let inCanvas: AnyCanvas | null = null; // use global variable to avoid recreating canvas on each frame
diff --git a/src/result.ts b/src/result.ts
index 26579a4b..1ed08bfb 100644
--- a/src/result.ts
+++ b/src/result.ts
@@ -5,148 +5,135 @@
 import type { Tensor } from './tfjs/types';
 import type { FaceGesture, BodyGesture, HandGesture, IrisGesture } from './gesture/gesture';
 
+/** generic box as [x, y, width, height] */
 export type Box = [number, number, number, number];
+/** generic point as [x, y, z?] */
 export type Point = [number, number, number?];
 
 /** Face results
- * Combined results of face detector, face mesh, age, gender, emotion, embedding, iris models
- * Some values may be null if specific model is not enabled
- *
- * Each result has:
- * - id: face id number
- * - score: overal detection confidence score value
- * - boxScore: face box detection confidence score value
- * - faceScore: face keypoints detection confidence score value
- * - box: face bounding box as array of [x, y, width, height], normalized to image resolution
- * - boxRaw: face bounding box as array of [x, y, width, height], normalized to range 0..1
- * - mesh: face keypoints as array of [x, y, z] points of face mesh, normalized to image resolution
- * - meshRaw: face keypoints as array of [x, y, z] points of face mesh, normalized to range 0..1
- * - annotations: annotated face keypoints as array of annotated face mesh points
- * - age: age as value
- * - gender: gender as value
- * - genderScore: gender detection confidence score as value
- * - emotion: emotions as array of possible emotions with their individual scores
- * - embedding: facial descriptor as array of numerical elements
- * - iris: iris distance from current viewpoint as distance value in centimeters for a typical camera
- *   field of view of 88 degrees. value should be adjusted manually as needed
- * - real: anti-spoofing analysis to determine if face is real of fake
- * - rotation: face rotiation that contains both angles and matrix used for 3d transformations
- *  - angle: face angle as object with values for roll, yaw and pitch angles
- *  - matrix: 3d transofrmation matrix as array of numeric values
- *  - gaze: gaze direction as object with values for bearing in radians and relative strength
- * - tensor: face tensor as Tensor object which contains detected face
+ * - Combined results of face detector, face mesh, age, gender, emotion, embedding, iris models
+ * - Some values may be null if specific model is not enabled
  */
 export interface FaceResult {
+  /** face id */
   id: number
+  /** overall face score */
   score: number,
+  /** detection score */
   boxScore: number,
+  /** mesh score */
   faceScore: number,
+  /** detected face box */
   box: Box,
+  /** detected face box normalized to 0..1 */
   boxRaw: Box,
+  /** detected face mesh */
   mesh: Array<Point>
+  /** detected face mesh normalized to 0..1 */
   meshRaw: Array<Point>
+  /** mesh keypoints combined into annotated results */
   annotations: Record<string, Point[]>,
+  /** detected age */
   age?: number,
+  /** detected gender */
   gender?: string,
+  /** gender detection score */
   genderScore?: number,
+  /** detected emotions */
   emotion?: Array<{ score: number, emotion: string }>,
+  /** face descriptor */
   embedding?: Array<number>,
+  /** face iris distance from camera */
   iris?: number,
+  /** face anti-spoofing result confidence */
   real?: number,
+  /** face rotation details */
   rotation?: {
     angle: { roll: number, yaw: number, pitch: number },
     matrix: [number, number, number, number, number, number, number, number, number],
     gaze: { bearing: number, strength: number },
   }
+  /** detected face as tensor that can be used in further pipelines */
   tensor?: Tensor,
 }
 
-export type BodyKeypoint = {
+export interface BodyKeypoint {
+  /** body part name */
   part: string,
+  /** body part position */
   position: Point,
+  /** body part position normalized to 0..1 */
   positionRaw: Point,
+  /** body part detection score */
   score: number,
 }
 
-/** Body results
- *
- * Each results has:
- * - id: body id number
- * - score: overall detection score
- * - box: bounding box: x, y, width, height normalized to input image resolution
- * - boxRaw: bounding box: x, y, width, height normalized to 0..1
- * - keypoints: array of keypoints
- *  - part: body part name
- *  - position: body part position with x,y,z coordinates
- *  - score: body part score value
- *  - presence: body part presence value
- */
+/** Body results */
 export interface BodyResult {
+  /** body id */
   id: number,
+  /** body detection score */
   score: number,
+  /** detected body box */
   box: Box,
+  /** detected body box normalized to 0..1 */
   boxRaw: Box,
-  annotations: Record<string, Array<Point[]>>,
+  /** detected body keypoints */
   keypoints: Array<BodyKeypoint>
+  /** detected body keypoints combined into annotated parts */
+  annotations: Record<string, Array<Point[]>>,
 }
 
-/** Hand results
- *
- * Each result has:
- * - id: hand id number
- * - score: detection confidence score as value
- * - box: bounding box: x, y, width, height normalized to input image resolution
- * - boxRaw: bounding box: x, y, width, height normalized to 0..1
- * - keypoints: keypoints as array of [x, y, z] points of hand, normalized to image resolution
- * - annotations: annotated landmarks for each hand part with keypoints
- * - landmarks: annotated landmarks for eachb hand part with logical curl and direction strings
- */
+/** Hand results */
 export interface HandResult {
+  /** hand id */
   id: number,
+  /** hand overal score */
   score: number,
+  /** hand detection score */
   boxScore: number,
+  /** hand skelton score */
   fingerScore: number,
+  /** detected hand box */
   box: Box,
+  /** detected hand box normalized to 0..1 */
   boxRaw: Box,
+  /** detected hand keypoints */
   keypoints: Array<Point>,
+  /** detected hand class */
   label: string,
+  /** detected hand keypoints combined into annotated parts */
   annotations: Record<
     'index' | 'middle' | 'pinky' | 'ring' | 'thumb' | 'palm',
     Array<Point>
   >,
+  /** detected hand parts annotated with part gestures */
   landmarks: Record<
     'index' | 'middle' | 'pinky' | 'ring' | 'thumb',
     { curl: 'none' | 'half' | 'full', direction: 'verticalUp' | 'verticalDown' | 'horizontalLeft' | 'horizontalRight' | 'diagonalUpRight' | 'diagonalUpLeft' | 'diagonalDownRight' | 'diagonalDownLeft' }
   >,
 }
 
-/** Object results
-*
-* Array of individual results with one object per detected gesture
-* Each result has:
-* - id: object id number
-* - score as value
-* - label as detected class name
-* - box: bounding box: x, y, width, height normalized to input image resolution
-* - boxRaw: bounding box: x, y, width, height normalized to 0..1
-* - center: optional center point as array of [x, y], normalized to image resolution
-* - centerRaw: optional center point as array of [x, y], normalized to range 0..1
-*/
+/** Object results */
 export interface ObjectResult {
+  /** object id */
   id: number,
+  /** object detection score */
   score: number,
+  /** detected object class id */
   class: number,
+  /** detected object class name */
   label: string,
+  /** detected object box */
   box: Box,
+  /** detected object box normalized to 0..1 */
   boxRaw: Box,
 }
 
-/** Gesture results
+/** Gesture combined results
  * @typedef Gesture Type
- *
- * Array of individual results with one object per detected gesture
  * Each result has:
- * - part: part name and number where gesture was detected: face, iris, body, hand
+ * - part: part name and number where gesture was detected: `face`, `iris`, `body`, `hand`
  * - gesture: gesture detected
  */
 export type GestureResult =
@@ -156,24 +143,22 @@ export type GestureResult =
   | { 'hand': number, gesture: HandGesture }
 
 /** Person getter
-* @interface Person Interface
-*
-* Each result has:
-* - id: person id
-* - face: face object
-* - body: body object
-* - hands: array of hand objects
-* - gestures: array of gestures
-* - box: bounding box: x, y, width, height normalized to input image resolution
-* - boxRaw: bounding box: x, y, width, height normalized to 0..1
+* - Triggers combining all individual results into a virtual person object
 */
 export interface PersonResult {
+  /** person id */
   id: number,
+  /** face result that belongs to this person */
   face: FaceResult,
+  /** body result that belongs to this person */
   body: BodyResult | null,
+  /** left and right hand results that belong to this person */
   hands: { left: HandResult | null, right: HandResult | null },
+  /** detected gestures specific to this person */
   gestures: Array<GestureResult>,
+  /** box that defines the person */
   box: Box,
+  /** box that defines the person normalized to 0..1 */
   boxRaw?: Box,
 }