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forked: javascript だけでカメラから画像を取り込む

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2013-02-26 21:31:20

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forked: javascript だけでカメラから画像を取り込む
jQuery v1.9.0

//単色化 擬似輝度を計算
                v = (3*r+6*g+b)/10;
                ret.data[k] = v;
                ret.data[k + 1] = v;//v 
                ret.data[k + 2] = v;//v
            }    
        }
        return ret;
    };
    
    /** 2値化+反転 フィルタ**/
    this.filterThreshold = function(imgData,t){
        var ret = imgData;
        var i = 0,v = 0;
        var len = ret.data.length;
        for(i = 0;i<len;i+=4){
            v = (ret.data[i] < t )?255:0;
            ret.data[i] = v;
            ret.data[i + 1] = v;
            ret.data[i + 2] = v;
        }
        return ret;    
    };
    
    /** ラベリング **/
    this.labeling = function(imgData,min_dot,max_dot){
        var w = imgData.width;
        var h = imgData.height;
        
        var data = imgData.data;
        var reflabel = [],label = [];
        var dot=[];
        var x=[],y=[];
        var width=[],height=[];
        var i=0;j=0;
        var k=0,k1=0,k2=0,r1=0,r2=0,v1=0,v2=0;
        var l=1,d=0;
        for (i = 1; i < h-1; i++) {
            for (j = 1; j<w-1; j++) {
                //1,白を見つける
                k  = (i * w + j)*4;
                label[k] = 0;
                if(data[k] == 255){
                    //2. 左,上 の色を習得
                    k1  = (i * w + (j-1)) * 4;  r1 = data[k1];
                    k2  = ((i-1) * w + j) * 4;  r2 = data[k2];
                    
                    if((r1 == 0)&&(r2 == 0)){
                        //3.  r1,r2が黒の場合 ラベルを1増やして配列に登録
                        l += 1;
                        reflabel[l]  = l;
                        
                        //left,top を保存
                        x[ reflabel[l] ] = j;
                        y[ reflabel[l] ] = i;
                    }
                    else if((r1 == 0)&&(r2 == 255)){
                        //4. 上のみ白
                        //6. 上と同じラベル
                        reflabel[l] = (typeof label[k2] == "undefined")?0:label[k2];
                    }
                    else if((r1 == 255)&&(r2 == 0)) {
                        //4. 左のみ白
                        //5. 左と同じラベル
                        reflabel[l] = (typeof label[k1] == "undefined")?0:label[k1];
                    }
                    else if((r1 == 255)&&(r2 == 255)){
                        //7.両方が白の場合  値が小さなラベル
                        v1 = (typeof label[k1] == "undefined")?0:label[k1];
                        v2 = (typeof label[k2] == "undefined")?0:label[k2];
                        reflabel[l] = (v1<v2)?v1:v2;
                        //TODO 大きな方を 小さい方の値でかきかえる
                        label[k1] = label[k2] = reflabel[l];
                    }
                    if(typeof reflabel[l] == "undefined") reflabel[l] = 0;
                    label[k] = reflabel[l];
                    
                    //ドット数の計算
                    dot[ reflabel[l] ] = (typeof dot[ reflabel[l] ] == "undefined")?1:dot[ reflabel[l] ]+1;
                    //w,h 幅と高さを保存
                    width[ reflabel[l] ]  = j - x[ reflabel[l] ];
                    height[ reflabel[l] ] = i - y[ reflabel[l] ];
                }
            }
        }
       
        //console.log($.extend({}, reflabel));        
        //TODO 参照先整理
        //console.log("reflabel");
        //console.log(reflabel);
        
       var cx=0,cy=0;
       for(l in label){
            var v = label[l];
            //ラベル0 以外 , ドット数の確認
            if((v == 0) || (dot[v] <= min_dot) || (dot[v] >= max_dot)){
                delete label[l];
                continue;
            }
            cx = x[v]+ ((width[v]/2)|0); //Math.floor(width[v]/2);
            cy = y[v]+ ((height[v]/2)|0); //Math.floor(height[v]/2);
            label[l] = {label:v,
                             dot: dot[v],
                             x:x[v],y:y[v],
                             w:width[v],h:height[v],
                             cx:cx,cy:cy};
        }
         //console.log("label");
        //console.log(label);
        
        return label;
    };
    
    /** ラベル毎に色分けしてみる **/
    this.filterTest1 = function(imgData,label){
        var ret = imgData;
        var w = imgData.width;
        var h = imgData.height;
        var old=-1, r=0,g=0,b=0;
        var color = [];
        
        var i =0,j=0;
        for (i = 0; i < h; i++) {
            for (j = 0; j<w; j++) {
                k  = (i * w + j) * 4;
                ret.data[k] = 255;
                ret.data[k+1] = 255;
                ret.data[k+2] = 255;
                if(typeof label[k] == "undefined") continue;
                var v = label[k].label;
                if(v !== 0){
                    if(old != v){
                        if( typeof color[v] == "undefined"){
                            //色を新規指定
                            r =  Math.floor( Math.random() * 255 );
                            g = Math.floor( Math.random() * 255 );
                            b = Math.floor( Math.random() * 255 );
                            color[v] = {r:r,g:g,b:b};
                            
                            //console.log( {label:label[k],color:color[v]} );
                        }
                        old = v;
                    }
                    ret.data[k] = color[v].r;
                    ret.data[k+1] = color[v].g;
                    ret.data[k+2] = color[v].b;
                }
            }
        }        
        return ret;
    };
    
    /** ラベルのサイズに枠を描画してみる **/
    this.filterTest2 = function(ctx,imgData,label){
        var w = imgData.width;
        var h = imgData.height;

ctx.strokeStyle = 'rgb(0, 0, 255)';        
        var old=-1,k=0;
        var i =0,j=0;
        for (i = 0; i < h; i++) {
            for (j = 0; j<w; j++) {
                k  = (i * w + j) * 4;
                if(typeof label[k] == "undefined") continue;
                var v = label[k].label;
                if(v !== 0){
                    if(old != v){
                        ctx.strokeRect( label[k].x,  label[k].y,  label[k].w,  label[k].h);
                        old = v;
                    }
                }
            }
        }
    };
};

var p = new Page();
$(document).ready(function(){
    p.init();
});

forked: javascript だけでカメラから画像を取り込む

// forked from t_furu's "javascript だけでカメラから画像を取り込む" http://jsdo.it/t_furu/fkXR var Page = function(){ this.localMediaStream = undefined; this.request = undefined; this.video = undefined; this.src_ctx = undefined; this.dest_ctx = undefined; //video の width,height this.video_size = {width:300,height:300}; this.init = function(){ this.browser_init(); $("#btnCapture").click($.proxy(this.clickBtnCapture,this)); $("#btnStop").click($.proxy(this.clickBtnStop,this)); }; // 各ブラウザ対応 this.browser_init = function(){ //リクエストアニメーションフレーム window.requestAnimationFrame = (function(){ return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback, element){ return window.setTimeout(callback, 1000 / 60); }; })(); //キャンセルアニメーションフレーム window.cancelRequestAnimFrame = ( function() { return window.cancelAnimationFrame || window.webkitCancelRequestAnimationFrame || window.mozCancelRequestAnimationFrame || window.oCancelRequestAnimationFrame || window.msCancelRequestAnimationFrame || clearTimeout } )(); window.URL = window.URL || window.webkitURL; window.navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia; }; /* カメラが使えるかチェック**/ this.hasGetUserMedia = function() { return !!navigator.getUserMedia; }; /** キャプチャー開始 **/ this.clickBtnCapture = function(t){ var flg = this.hasGetUserMedia(); if(flg == false){ alert("getUserMedia に未対応のブラウザ"); } navigator.getUserMedia({video: true},$.proxy(this.callbackGetUserMedia,this), this.onFailSoHard); }; /** キャプチャストップ**/ this.clickBtnStop = function(t){ if(!this.localMediaStream) return; this.localMediaStream.stop(); window.cancelRequestAnimFrame(this.request); }; /** カメラキャプチャ開始失敗 **/ this.onFailSoHard = function(e) { console.log('エラー!', e); }; this.callbackGetUserMedia = function(stream) { this.localMediaStream = stream; this.video =$("<video>")[0]; this.video.width = this.video_size["width"]; this.video.height = this.video_size["height"]; this.video.src = window.URL.createObjectURL(stream); this.video.play(); var src_canvas = $("<canvas>")[0]; src_canvas.width = this.video.width; src_canvas.height = this.video.height; this.src_ctx = src_canvas.getContext('2d'); var canvas = $("#canvas")[0]; canvas.width = this.video.width; canvas.height = this.video.height; this.dest_ctx = canvas.getContext('2d'); $.proxy(this.animloop,this)(); }; /* アニメーションループ */ this.animloop = function(){ this.capture(); this.request = window.requestAnimationFrame($.proxy(this.animloop,this)); }; /** キャプチャした画像をキャンバスに描画する */ this.capture = function(){ this.src_ctx.drawImage(this.video, 0, 0); var imgData = this.src_ctx.getImageData(0, 0, this.video.width, this.video.height); //ここで色んなフィルタ処理をしてみる //平滑化+白黒化 imgData = this.filterSmoothing(imgData); //二値化 imgData = this.filterThreshold(imgData,128); //ラベリング var m = ((this.video.width * this.video.height)/2)|0; var label = this.labeling(imgData,4, m); //ラベル毎に色分けしてみる //imgData = this.filterTest1(imgData,label); //var imgDataColor = this.src_ctx.getImageData(0, 0, this.video.width, this.video.height); //this.dest_ctx.putImageData(imgDataColor,0,0); this.dest_ctx.putImageData(imgData,0,0); //ラベル毎に枠表示してみる this.filterTest2(this.dest_ctx,imgData,label); }; /** 平滑化+白黒化フィルタ **/ this.filterSmoothing = function(imgData){ var ret = imgData; var i=0,j=0,k=0,l=0,m=0,n=0; var r=0,g=0,b=0,v=0; var w = imgData.width; var h = imgData.height; for (i = 1; i < h-1; i++) { for (j = 1; j<w-1; j++) { r=0;g=0;b=0;v=0; k = (i * w + j) * 4; //3x3の合計値を求める for (l = -1; l <= 1; l++) { for ( m = -1; m <= 1; m++) { n = k + (l * w + m) * 4; r += ret.data[n]; g += ret.data[n + 1]; b += ret.data[n + 2]; } } //3x3の平均値を求める r = (r/9)|0; //Math.floor(r/9); g = (g/9)|0; //Math.floor(g/9); b = (b/9)|0; //Math.floor(b/9); //単色化擬似輝度を計算 v = (3*r+6*g+b)/10; ret.data[k] = v; ret.data[k + 1] = v;//v ret.data[k + 2] = v;//v } } return ret; }; /** 2値化+反転フィルタ**/ this.filterThreshold = function(imgData,t){ var ret = imgData; var i = 0,v = 0; var len = ret.data.length; for(i = 0;i<len;i+=4){ v = (ret.data[i] < t )?255:0; ret.data[i] = v; ret.data[i + 1] = v; ret.data[i + 2] = v; } return ret; }; /** ラベリング **/ this.labeling = function(imgData,min_dot,max_dot){ var w = imgData.width; var h = imgData.height; var data = imgData.data; var reflabel = [],label = []; var dot=[]; var x=[],y=[]; var width=[],height=[]; var i=0;j=0; var k=0,k1=0,k2=0,r1=0,r2=0,v1=0,v2=0; var l=1,d=0; for (i = 1; i < h-1; i++) { for (j = 1; j<w-1; j++) { //1,白を見つける k = (i * w + j)*4; label[k] = 0; if(data[k] == 255){ //2. 左,上の色を習得 k1 = (i * w + (j-1)) * 4; r1 = data[k1]; k2 = ((i-1) * w + j) * 4; r2 = data[k2]; if((r1 == 0)&&(r2 == 0)){ //3. r1,r2が黒の場合ラベルを1増やして配列に登録 l += 1; reflabel[l] = l; //left,top を保存 x[ reflabel[l] ] = j; y[ reflabel[l] ] = i; } else if((r1 == 0)&&(r2 == 255)){ //4. 上のみ白 //6. 上と同じラベル reflabel[l] = (typeof label[k2] == "undefined")?0:label[k2]; } else if((r1 == 255)&&(r2 == 0)) { //4. 左のみ白 //5. 左と同じラベル reflabel[l] = (typeof label[k1] == "undefined")?0:label[k1]; } else if((r1 == 255)&&(r2 == 255)){ //7.両方が白の場合値が小さなラベル v1 = (typeof label[k1] == "undefined")?0:label[k1]; v2 = (typeof label[k2] == "undefined")?0:label[k2]; reflabel[l] = (v1<v2)?v1:v2; //TODO 大きな方を小さい方の値でかきかえる label[k1] = label[k2] = reflabel[l]; } if(typeof reflabel[l] == "undefined") reflabel[l] = 0; label[k] = reflabel[l]; //ドット数の計算 dot[ reflabel[l] ] = (typeof dot[ reflabel[l] ] == "undefined")?1:dot[ reflabel[l] ]+1; //w,h 幅と高さを保存 width[ reflabel[l] ] = j - x[ reflabel[l] ]; height[ reflabel[l] ] = i - y[ reflabel[l] ]; } } } //console.log($.extend({}, reflabel)); //TODO 参照先整理 //console.log("reflabel"); //console.log(reflabel); var cx=0,cy=0; for(l in label){ var v = label[l]; //ラベル0 以外 , ドット数の確認 if((v == 0) || (dot[v] <= min_dot) || (dot[v] >= max_dot)){ delete label[l]; continue; } cx = x[v]+ ((width[v]/2)|0); //Math.floor(width[v]/2); cy = y[v]+ ((height[v]/2)|0); //Math.floor(height[v]/2); label[l] = {label:v, dot: dot[v], x:x[v],y:y[v], w:width[v],h:height[v], cx:cx,cy:cy}; } //console.log("label"); //console.log(label); return label; }; /** ラベル毎に色分けしてみる **/ this.filterTest1 = function(imgData,label){ var ret = imgData; var w = imgData.width; var h = imgData.height; var old=-1, r=0,g=0,b=0; var color = []; var i =0,j=0; for (i = 0; i < h; i++) { for (j = 0; j<w; j++) { k = (i * w + j) * 4; ret.data[k] = 255; ret.data[k+1] = 255; ret.data[k+2] = 255; if(typeof label[k] == "undefined") continue; var v = label[k].label; if(v !== 0){ if(old != v){ if( typeof color[v] == "undefined"){ //色を新規指定 r = Math.floor( Math.random() * 255 ); g = Math.floor( Math.random() * 255 ); b = Math.floor( Math.random() * 255 ); color[v] = {r:r,g:g,b:b}; //console.log( {label:label[k],color:color[v]} ); } old = v; } ret.data[k] = color[v].r; ret.data[k+1] = color[v].g; ret.data[k+2] = color[v].b; } } } return ret; }; /** ラベルのサイズに枠を描画してみる **/ this.filterTest2 = function(ctx,imgData,label){ var w = imgData.width; var h = imgData.height; ctx.strokeStyle = 'rgb(0, 0, 255)'; var old=-1,k=0; var i =0,j=0; for (i = 0; i < h; i++) { for (j = 0; j<w; j++) { k = (i * w + j) * 4; if(typeof label[k] == "undefined") continue; var v = label[k].label; if(v !== 0){ if(old != v){ ctx.strokeRect( label[k].x, label[k].y, label[k].w, label[k].h); old = v; } } } } }; }; var p = new Page(); $(document).ready(function(){ p.init(); });<div id="btn_container"> <input type="button" id="btnCapture" value="Capture"> <input type="button" id="btnStop" value="Stop"> </div> <div id="canvas_container"> <canvas id="canvas" width="0" height="0"></canvas> </div>* { margin: 0; padding: 0; /* border: 0; */ } body { background: #fdf; } #btn_container{ width:100%; } #canvas_container{ width:100%; } #canvas{ /* margin: 0 auto; */ display:block; background: #000; }

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forked: javascript だけでカメラから画像を取り込む

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