var canvas = document.getElementById('canvas');
if ( ! canvas || ! canvas.getContext ) { return false; }
var ctx = canvas.getContext('2d');
/* Imageオブジェクトを生成 */
var img = new Image();
img.src = "../gunmachan.jpg?" + new Date().getTime();
img.onload = function() {
ctx.drawImage(img, 0, 0); //canvasに転写
var imgData = ctx.getImageData(0, 0, 300, 364); //pixcelデータを取得
//pixcel loop 赤を強調
for (var i = 0; i < imgData.data.length; i += 4) {
imgData.data[i] = 255; //R
//imgData.data[i + 1] //G
//imgData.data[i + 2] //B
//imgData.data[i + 3] //α
}
ctx.putImageData(imgData,0,0); //canvasに再度転写
}
/
#