ngx-face-api-js
Version:
Angular directives for face detection and face recognition in the browser. It is a wrapper for face-api.js, so it is not dependent on the browser implementation.
228 lines • 18.4 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
import * as tslib_1 from "tslib";
import { Component, ViewChild, ElementRef, Renderer2, HostListener, } from '@angular/core';
import { Subscription, Subject, combineLatest } from 'rxjs';
import * as faceapi from 'face-api.js';
import { map, startWith } from 'rxjs/operators';
import { DetectTask } from '../../classes/DetectTask';
import { FaceDetectorService } from '../../services/face-detector.service';
var DetectionResultComponent = /** @class */ (function () {
function DetectionResultComponent(task, el, renderer, faceDetector) {
this.task = task;
this.el = el;
this.renderer = renderer;
this.faceDetector = faceDetector;
this.subscription = new Subscription();
this.resize$ = new Subject();
}
Object.defineProperty(DetectionResultComponent.prototype, "canvas", {
get: /**
* @private
* @return {?}
*/
function () {
return this.canvasEl.nativeElement;
},
enumerable: true,
configurable: true
});
/**
* @return {?}
*/
DetectionResultComponent.prototype.onResize = /**
* @return {?}
*/
function () {
this.resize$.next('onResize');
};
/**
* @private
* @param {?} result
* @return {?}
*/
DetectionResultComponent.prototype.convertResultToArray = /**
* @private
* @param {?} result
* @return {?}
*/
function (result) {
if (Array.isArray(result)) {
return result;
}
return [result];
};
/**
* @return {?}
*/
DetectionResultComponent.prototype.ngOnInit = /**
* @return {?}
*/
function () {
var _this = this;
this.subscription.add(combineLatest(this.faceDetector.detect(this.task), this.resize$.pipe(startWith('init')))
.pipe(map((/**
* @param {?} __0
* @return {?}
*/
function (_a) {
var _b = tslib_1.__read(_a, 1), result = _b[0];
return _this.convertResultToArray(result);
})))
.subscribe((/**
* @param {?} result
* @return {?}
*/
function (result) { return _this.draw(result); })));
};
/**
* @return {?}
*/
DetectionResultComponent.prototype.ngOnDestroy = /**
* @return {?}
*/
function () {
this.subscription.unsubscribe();
};
/**
* @private
* @param {?} results
* @return {?}
*/
DetectionResultComponent.prototype.draw = /**
* @private
* @param {?} results
* @return {?}
*/
function (results) {
return tslib_1.__awaiter(this, void 0, void 0, function () {
var target, width, height, detectionsForSize, resizeResults;
var _this = this;
return tslib_1.__generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.task.target];
case 1:
target = _a.sent();
width = target.width, height = target.height;
if (target instanceof HTMLVideoElement) {
height = target.videoHeight;
width = target.videoWidth;
}
detectionsForSize = faceapi.resizeResults(results.map((/**
* @param {?} result
* @return {?}
*/
function (result) {
return result instanceof faceapi.FaceDetection ? result : result.detection;
})), { width: width, height: height });
this.canvas.width = width;
this.canvas.height = height;
this.renderer.setStyle(this.canvas, 'width', width + "px");
this.renderer.setStyle(this.canvas, 'height', height + "px");
if (this.task.tokens.length >= 1) {
faceapi.draw.drawDetections(this.canvas, detectionsForSize);
resizeResults = faceapi.resizeResults(results, { width: width, height: height });
if (this.task.tokens.includes('expressions')) {
faceapi.draw.drawFaceExpressions(this.canvas, resizeResults.map((/**
* @param {?} __0
* @return {?}
*/
function (_a) {
var detection = _a.detection, expressions = _a.expressions;
return ({
position: detection.box,
expressions: expressions,
});
})));
}
if (this.task.tokens.includes('landmarks')) {
faceapi.draw.drawFaceLandmarks(this.canvas, resizeResults.map((/**
* @param {?} __0
* @return {?}
*/
function (_a) {
var landmarks = _a.landmarks;
return landmarks;
})));
}
if (this.task.tokens.includes('ageAndGender')) {
resizeResults.forEach((/**
* @param {?} result
* @return {?}
*/
function (result) {
var age = result.age, gender = result.gender, genderProbability = result.genderProbability;
/** @type {?} */
var text = new faceapi.draw.DrawTextField([
faceapi.round(age, 0) + " years",
gender + " (" + faceapi.round(genderProbability) + ")",
], result.detection.box.bottomLeft);
text.draw(_this.canvas);
}));
}
}
else {
faceapi.draw.drawDetections(this.canvas, detectionsForSize);
}
return [2 /*return*/];
}
});
});
};
DetectionResultComponent.decorators = [
{ type: Component, args: [{
template: "<canvas #canvas></canvas>\n",
styles: ["canvas{width:100%;height:100%}"]
}] }
];
/** @nocollapse */
DetectionResultComponent.ctorParameters = function () { return [
{ type: DetectTask },
{ type: ElementRef },
{ type: Renderer2 },
{ type: FaceDetectorService }
]; };
DetectionResultComponent.propDecorators = {
canvasEl: [{ type: ViewChild, args: ['canvas',] }],
onResize: [{ type: HostListener, args: ['window:resize',] }]
};
return DetectionResultComponent;
}());
export { DetectionResultComponent };
if (false) {
/** @type {?} */
DetectionResultComponent.prototype.subscription;
/**
* @type {?}
* @private
*/
DetectionResultComponent.prototype.canvasEl;
/**
* @type {?}
* @private
*/
DetectionResultComponent.prototype.resize$;
/**
* @type {?}
* @private
*/
DetectionResultComponent.prototype.task;
/**
* @type {?}
* @private
*/
DetectionResultComponent.prototype.el;
/**
* @type {?}
* @private
*/
DetectionResultComponent.prototype.renderer;
/**
* @type {?}
* @private
*/
DetectionResultComponent.prototype.faceDetector;
}
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{\n  Component,\n  OnInit,\n  ViewChild,\n  ElementRef,\n  Renderer2,\n  OnDestroy,\n  HostListener,\n} from '@angular/core';\nimport { Subscription, Subject, combineLatest } from 'rxjs';\n\nimport * as faceapi from 'face-api.js';\nimport { map, startWith } from 'rxjs/operators';\nimport { DetectTask } from '../../classes/DetectTask';\nimport { FaceDetectorService } from '../../services/face-detector.service';\n\n@Component({\n  templateUrl: './detection-result.component.html',\n  styleUrls: ['./detection-result.component.scss'],\n})\nexport class DetectionResultComponent implements OnInit, OnDestroy {\n  subscription = new Subscription();\n\n  @ViewChild('canvas')\n  private canvasEl: ElementRef<HTMLCanvasElement>;\n\n  private get canvas(): HTMLCanvasElement {\n    return this.canvasEl.nativeElement;\n  }\n\n  private resize$ = new Subject();\n\n  @HostListener('window:resize')\n  public onResize() {\n    this.resize$.next('onResize');\n  }\n\n  constructor(\n    private task: DetectTask,\n    private el: ElementRef,\n    private renderer: Renderer2,\n    private faceDetector: FaceDetectorService,\n  ) {}\n\n  private convertResultToArray(result: any): any[] {\n    if (Array.isArray(result)) {\n      return result;\n    }\n    return [result];\n  }\n\n  ngOnInit() {\n    this.subscription.add(\n      combineLatest(\n        this.faceDetector.detect(this.task),\n        this.resize$.pipe(startWith('init')),\n      )\n        .pipe(map(([result]) => this.convertResultToArray(result)))\n        .subscribe(result => this.draw(result)),\n    );\n  }\n\n  ngOnDestroy() {\n    this.subscription.unsubscribe();\n  }\n  private async draw(results: any[]) {\n    const target = await this.task.target;\n    let { width, height } = target;\n    if (target instanceof HTMLVideoElement) {\n      height = target.videoHeight;\n      width = target.videoWidth;\n    }\n\n    const detectionsForSize = faceapi.resizeResults(\n      results.map(result =>\n        result instanceof faceapi.FaceDetection ? result : result.detection,\n      ),\n      { width, height },\n    );\n\n    this.canvas.width = width;\n    this.canvas.height = height;\n    this.renderer.setStyle(this.canvas, 'width', `${width}px`);\n    this.renderer.setStyle(this.canvas, 'height', `${height}px`);\n    if (this.task.tokens.length >= 1) {\n      faceapi.draw.drawDetections(this.canvas, detectionsForSize);\n\n      const resizeResults = faceapi.resizeResults(results, { width, height });\n      if (this.task.tokens.includes('expressions')) {\n        faceapi.draw.drawFaceExpressions(\n          this.canvas,\n          resizeResults.map(({ detection, expressions }) => ({\n            position: detection.box,\n            expressions,\n          })),\n        );\n      }\n\n      if (this.task.tokens.includes('landmarks')) {\n        faceapi.draw.drawFaceLandmarks(\n          this.canvas,\n          resizeResults.map(({ landmarks }) => landmarks),\n        );\n      }\n\n      if (this.task.tokens.includes('ageAndGender')) {\n        resizeResults.forEach(result => {\n          const { age, gender, genderProbability } = result;\n          const text = new faceapi.draw.DrawTextField(\n            [\n              `${faceapi.round(age, 0)} years`,\n              `${gender} (${faceapi.round(genderProbability)})`,\n            ],\n            result.detection.box.bottomLeft,\n          );\n          text.draw(this.canvas);\n        });\n      }\n    } else {\n      faceapi.draw.drawDetections(this.canvas, detectionsForSize);\n    }\n  }\n}\n"]}