200余行代码，Github 3.4k星，让你实时从视频中隐身
持续推送技术干货
const bodyPixProperties = {
architecture: 'MobileNetV1',
outputStride: 16,
multiplier: 0.75,
quantBytes: 4
};// Go through pixels and figure out bounding box of body pixels.
for (let x = 0; x < canvas.width; x++) {
for (let y = 0; y < canvas.height; y++) {
let n = y * canvas.width + x;
// Human pixel found. Update bounds.
if (segmentation.data[n] !== 0) {
if(x < minX) {
minX = x;
}
if(y < minY) {
minY = y;
}
if(x > maxX) {
maxX = x;
}
if(y > maxY) {
maxY = y;
}
foundBody = true;
}
}
}// Calculate dimensions of bounding box.
var width = maxX - minX;
var height = maxY - minY;
// Define scale factor to use to allow for false negatives around this region.
var scale = 1.3;
// Define scaled dimensions.
var newWidth = width * scale;
var newHeight = height * scale;
// Caculate the offset to place new bounding box so scaled from center of current bounding box.
var offsetX = (newWidth - width) / 2;
var offsetY = (newHeight - height) / 2;
var newXMin = minX - offsetX;
var newYMin = minY - offsetY;// Now loop through update backgound understanding with new data
// if not inside a bounding box.
for (let x = 0; x < canvas.width; x++) {
for (let y = 0; y < canvas.height; y++) {
// If outside bounding box and we found a body, update background.
if (foundBody && (x < newXMin || x > newXMin + newWidth) || ( y < newYMin || y > newYMin + newHeight)) {
// Convert xy co-ords to array offset.
let n = y * canvas.width + x;
data[n * 4] = dataL[n * 4];
data[n * 4 + 1] = dataL[n * 4 + 1];
data[n * 4 + 2] = dataL[n * 4 + 2];
data[n * 4 + 3] = 255;
} else if (!foundBody) {
// No body found at all, update all pixels.
let n = y * canvas.width + x;
data[n * 4] = dataL[n * 4];
data[n * 4 + 1] = dataL[n * 4 + 1];
data[n * 4 + 2] = dataL[n * 4 + 2];
data[n * 4 + 3] = 255;
}
}
}
ctx.putImageData(imageData, 0, 0);
if (DEBUG) {
ctx.strokeStyle = "#00FF00"
ctx.beginPath();
ctx.rect(newXMin, newYMin, newWidth, newHeight);
ctx.stroke();
}
}来源：机器之心
在这金三银四的季节，栈长为大家准备了四份面试宝典：
《java面试宝典5.0》
《Java（BAT）面试必备》
《350道Java面试题：整理自100+公司》
《资深java面试宝典-视频版》
分别适用于初中级，中高级，以及资深级工程师的面试复习。
内容包含java基础、javaweb、各个性能优化、JVM、锁、高并发、反射、Spring原理、微服务、Zookeeper、数据库、数据结构、限流熔断降级等等。
获取方式：点“在看”，V信扫描上面二维码：注明面试领取，更多精彩陆续奉上。