18 lines
8.2 KiB
JavaScript
18 lines
8.2 KiB
JavaScript
/**
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* @license
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* Copyright 2021 Google LLC. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* =============================================================================
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*/
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!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports,require("@tensorflow/tfjs-core"),require("@tensorflow/tfjs-converter")):"function"==typeof define&&define.amd?define(["exports","@tensorflow/tfjs-core","@tensorflow/tfjs-converter"],e):e(t.blazeface={},t.tf,t.tf)}(this,function(t,e,n){"use strict";function r(t,e,n,r){return new(n||(n=Promise))(function(o,i){function s(t){try{c(r.next(t))}catch(t){i(t)}}function a(t){try{c(r.throw(t))}catch(t){i(t)}}function c(t){var e;t.done?o(t.value):(e=t.value,e instanceof n?e:new n(function(t){t(e)})).then(s,a)}c((r=r.apply(t,e||[])).next())})}function o(t,e){var n,r,o,i,s={label:0,sent:function(){if(1&o[0])throw o[1];return o[1]},trys:[],ops:[]};return i={next:a(0),throw:a(1),return:a(2)},"function"==typeof Symbol&&(i[Symbol.iterator]=function(){return this}),i;function a(i){return function(a){return function(i){if(n)throw new TypeError("Generator is already executing.");for(;s;)try{if(n=1,r&&(o=2&i[0]?r.return:i[0]?r.throw||((o=r.return)&&o.call(r),0):r.next)&&!(o=o.call(r,i[1])).done)return o;switch(r=0,o&&(i=[2&i[0],o.value]),i[0]){case 0:case 1:o=i;break;case 4:return s.label++,{value:i[1],done:!1};case 5:s.label++,r=i[1],i=[0];continue;case 7:i=s.ops.pop(),s.trys.pop();continue;default:if(!(o=(o=s.trys).length>0&&o[o.length-1])&&(6===i[0]||2===i[0])){s=0;continue}if(3===i[0]&&(!o||i[1]>o[0]&&i[1]<o[3])){s.label=i[1];break}if(6===i[0]&&s.label<o[1]){s.label=o[1],o=i;break}if(o&&s.label<o[2]){s.label=o[2],s.ops.push(i);break}o[2]&&s.ops.pop(),s.trys.pop();continue}i=e.call(t,s)}catch(t){i=[6,t],r=0}finally{n=o=0}if(5&i[0])throw i[1];return{value:i[0]?i[1]:void 0,done:!0}}([i,a])}}}var i=function(t){return{startEndTensor:t,startPoint:e.slice(t,[0,0],[-1,2]),endPoint:e.slice(t,[0,2],[-1,2])}},s=function(t,n){var r=e.mul(t.startPoint,n),o=e.mul(t.endPoint,n),s=e.concat2d([r,o],1);return i(s)};function a(t,n){var r,o,i;if(t.topLeft instanceof e.Tensor&&t.bottomRight instanceof e.Tensor){var s=e.tidy(function(){return[e.concat([e.slice(e.sub(n-1,t.topLeft),0,1),e.slice(t.topLeft,1,1)]),e.concat([e.sub(n-1,e.slice(t.bottomRight,0,1)),e.slice(t.bottomRight,1,1)])]});r=s[0],o=s[1],null!=t.landmarks&&(i=e.tidy(function(){var r=e.sub(e.tensor1d([n-1,0]),t.landmarks),o=e.tensor1d([1,-1]);return e.mul(r,o)}))}else{var a=t.topLeft,c=a[0],u=a[1],l=t.bottomRight,d=l[0],f=l[1];r=[n-1-c,u],o=[n-1-d,f],null!=t.landmarks&&(i=t.landmarks.map(function(t){return[n-1-t[0],t[1]]}))}var h={topLeft:r,bottomRight:o};return null!=i&&(h.landmarks=i),null!=t.probability&&(h.probability=t.probability instanceof e.Tensor?t.probability.clone():t.probability),h}function c(t,n){return e.tidy(function(){var r;return r=t.hasOwnProperty("box")?t.box:t,e.squeeze(s(r,n).startEndTensor)})}var u=function(){function t(t,n,r,o,i,s){this.blazeFaceModel=t,this.width=n,this.height=r,this.maxFaces=o;var a={strides:[n/16,n/8],anchors:[2,6]};this.anchorsData=function(t,e,n){for(var r=[],o=0;o<n.strides.length;o++)for(var i=n.strides[o],s=Math.floor((e+i-1)/i),a=Math.floor((t+i-1)/i),c=n.anchors[o],u=0;u<s;u++)for(var l=i*(u+.5),d=0;d<a;d++)for(var f=i*(d+.5),h=0;h<c;h++)r.push([f,l]);return r}(n,r,a),this.anchors=e.tensor2d(this.anchorsData),this.inputSize=e.tensor1d([n,r]),this.iouThreshold=i,this.scoreThreshold=s}return t.prototype.resizeAspectRatio=function(t,n,r){var o=t.shape[2],i=t.shape[1];if(!n||!r)return{ratio:1,image:t};var s=Math.min(n/o,r/i),a=Math.round(o*s),c=Math.round(i*s);return{ratio:s,image:e.image.resizeBilinear(t,[c,a])}},t.prototype.getBoundingBoxes=function(t,n,s){return void 0===s&&(s=!0),r(this,void 0,void 0,function(){var a,c,u,l,d,f,h,p,b,v,m,y,w,g=this;return o(this,function(x){switch(x.label){case 0:return a=e.tidy(function(){var n,r,o,i,s,a,c,u,l,d,f,h,p,b=g.resizeAspectRatio(t,g.width,g.height),v=e.tensor2d([[1,0,0,0,1,0,0,0]]),m=e.image.transform(b.image,v,"nearest","constant",0,[g.width,g.height]),y=e.mul(e.sub(e.div(m,255),.5),2),w=g.blazeFaceModel.predict(y).sort(function(t,e){return t.size-e.size}),x=e.concat([w[0],w[2]],2),z=e.concat([w[1],w[3]],2),T=e.concat([z,x],1),k=e.squeeze(T),M=(n=k,r=g.anchors,o=g.inputSize,i=e.slice(n,[0,1],[-1,2]),s=e.add(i,r),a=e.slice(n,[0,3],[-1,2]),c=e.div(a,o),u=e.div(s,o),l=e.div(c,2),d=e.sub(u,l),f=e.add(u,l),h=e.mul(d,o),p=e.mul(f,o),e.concat2d([h,p],1)),P=e.slice(k,[0,0],[-1,1]);return[k,M,e.squeeze(e.sigmoid(P)),b.ratio]}),c=a[0],u=a[1],l=a[2],d=a[3],f=console.warn,console.warn=function(){},h=e.image.nonMaxSuppression(u,l,this.maxFaces,this.iouThreshold,this.scoreThreshold),console.warn=f,[4,h.array()];case 1:return p=x.sent(),h.dispose(),b=p.map(function(t){return e.slice(u,[t,0],[1,-1])}),n?[3,3]:[4,Promise.all(b.map(function(t){return r(g,void 0,void 0,function(){var e;return o(this,function(n){switch(n.label){case 0:return[4,t.array()];case 1:return e=n.sent(),t.dispose(),[2,e]}})})}))];case 2:b=x.sent(),x.label=3;case 3:for(v=n?e.div([1,1],d):[1/d,1/d],m=[],y=function(t){var r=b[t],o=e.tidy(function(){var o=r instanceof e.Tensor?i(r):i(e.tensor2d(r));if(!s)return o;var a,u=p[t];return a=n?e.slice(g.anchors,[u,0],[1,2]):g.anchorsData[u],{box:o,landmarks:e.reshape(e.squeeze(e.slice(c,[u,5],[1,-1])),[6,-1]),probability:e.slice(l,[u],[1]),anchor:a}});m.push(o)},w=0;w<b.length;w++)y(w);return u.dispose(),l.dispose(),c.dispose(),[2,{boxes:m,scaleFactor:v}]}})})},t.prototype.estimateFaces=function(t,n,i,s){return void 0===n&&(n=!1),void 0===i&&(i=!1),void 0===s&&(s=!0),r(this,void 0,void 0,function(){var u,l,d,f,h,p,b=this;return o(this,function(v){switch(v.label){case 0:return u=function(t){return t instanceof e.Tensor?[t.shape[0],t.shape[1]]:[t.height,t.width]}(t),l=u[1],d=e.tidy(function(){return t instanceof e.Tensor||(t=e.browser.fromPixels(t)),e.expandDims(e.cast(t,"float32"),0)}),[4,this.getBoundingBoxes(d,n,s)];case 1:return f=v.sent(),h=f.boxes,p=f.scaleFactor,d.dispose(),n?[2,h.map(function(t){var n=c(t,p),r={topLeft:e.slice(n,[0],[2]),bottomRight:e.slice(n,[2],[2])};if(s){var o=t,u=o.landmarks,d=o.probability,f=o.anchor,h=e.mul(e.add(u,f),p);r.landmarks=h,r.probability=d}return i&&(r=a(r,l)),r})]:[2,Promise.all(h.map(function(t){return r(b,void 0,void 0,function(){var e,n,u,d,f,h,b,v,m,y,w,g=this;return o(this,function(x){switch(x.label){case 0:return e=c(t,p),s?[3,2]:[4,e.array()];case 1:return f=x.sent(),n={topLeft:f.slice(0,2),bottomRight:f.slice(2)},[3,4];case 2:return[4,Promise.all([t.landmarks,e,t.probability].map(function(t){return r(g,void 0,void 0,function(){return o(this,function(e){return[2,t.array()]})})}))];case 3:u=x.sent(),d=u[0],f=u[1],h=u[2],b=t.anchor,m=(v=p)[0],y=v[1],w=d.map(function(t){return[(t[0]+b[0])*m,(t[1]+b[1])*y]}),n={topLeft:f.slice(0,2),bottomRight:f.slice(2),landmarks:w,probability:h},(z=t.box).startEndTensor.dispose(),z.startPoint.dispose(),z.endPoint.dispose(),t.landmarks.dispose(),t.probability.dispose(),x.label=4;case 4:return e.dispose(),i&&(n=a(n,l)),[2,n]}var z})})}))]}})})},t.prototype.dispose=function(){null!=this.blazeFaceModel&&this.blazeFaceModel.dispose()},t}(),l="https://tfhub.dev/tensorflow/tfjs-model/blazeface/1/default/1";t.load=function(t){var e=void 0===t?{}:t,i=e.maxFaces,s=void 0===i?10:i,a=e.inputWidth,c=void 0===a?128:a,d=e.inputHeight,f=void 0===d?128:d,h=e.iouThreshold,p=void 0===h?.3:h,b=e.scoreThreshold,v=void 0===b?.75:b,m=e.modelUrl;return r(this,void 0,void 0,function(){var t;return o(this,function(e){switch(e.label){case 0:return null==m?[3,2]:[4,n.loadGraphModel(m)];case 1:return t=e.sent(),[3,4];case 2:return[4,n.loadGraphModel(l,{fromTFHub:!0})];case 3:t=e.sent(),e.label=4;case 4:return[2,new u(t,c,f,s,p,v)]}})})},t.BlazeFaceModel=u,Object.defineProperty(t,"__esModule",{value:!0})});
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