
基于 HTML5 的人脸识别技术
绍一个网站,演示了通过 HTML5 + JavaScript 技术实现的人脸识别,目前仅适用于 Chrome浏览器,首先需要在地址栏输入 about:flags ,然后找到“启用 MediaStream” 这一项,点击“启用” 后重启 Chrome 浏览器
然后打开下面地址:
/
当你摇头晃脑的时候,那副眼镜会跟着移动并帮你戴上眼镜。
你可以查看网页源码来了解具体的实现细节。
———————————–我是分界线———————————————
这是一篇国外的文章,介绍如何通过 WebRTC、OpenCV 和 WebSocket 技术实现在 Web 浏览器上的人脸识别,架构在 Jetty 之上。
实现的效果包括:
还能识别眼睛
人脸识别的核心代码:
页面:
XML/HTML Code 复制内容到剪贴板
- <div>
- <video id="live" width="320" height="240" autoplay style="display: inline;"></video>
- <canvas width=>.html<"320" id="canvas" height="240" style="display: inline;">>.html<</canvas>
- </div>
-
- <script>.html< type="text/javascript">
- var video = $("#live").get()[0];
- var canvas>.html< = $("#canvas");
- var ctx =>.html< ()[0].getContext('2d');
-
- navigator.>.html<webkitGetUserMedia("video",
- function(stream) {
- video.src = >.html&ateObjectURL(stream);
- },
- function(err)>.html< {
- console.log("Unable to get video stream!")
- }
- )
-
- timer = setInterval(
- function () >.html<{
- ctx.drawImage(video, 0, 0, 320, 240);
- }, 250);
- </script>.html<>
JavaScript Code 复制内容到剪贴板
- public class FaceDetection {
-
- private static final String CASCADE_FILE ="resources/haarcascade_l";
-
- private int minsize >.html<= 20;
- private int group = 0;
- private double s>.html<cale = 1.1;
-
- /**
- * Based on >.html<FaceDetection example from JavaCV.
- */
- public byte[] convert(byte[] imageData) throws IOException {
- // create image from supplied bytearray
- IplImage originalImage = cvDecodeImage(cvMat(1, imageData.length,CV_8UC1, newBytePointer(imageData)));
-
- // Convert to grayscale>.html< for recognition
- IplImage grayImage = ate(originalImage.width(), originalImage.height(), IPL_DEPTH_8U, 1);
- cvCvtColor(>.html<originalImage, grayImage, CV_BGR2GRAY);
-
- // storage is needed to store information during detection
- CvMemStorage storage = ate();
-
- // Configuration to use in analysis
- CvHaarClassifierCascade cascade = newCvHaarClassifierCascade(cvLoad(CASCADE_FILE));
-
- // We detect the>.html< faces.
- CvSeq faces = cvHaarDetectObjects(grayImage, cascade, storage, scale, group, minsize);
-
- // We iterate over the discovered faces and draw yellow rectangles around them.
- for (int i = 0; i < al(); i++) {
- CvRect r = >.html<new CvRect(cvGetSeqElem(faces, i));
- cvRectangle(originalImage, cvPoint(r.x(), r.y()),
- cvPoint(r.x() + r.width(), r.y() + r.height()),
- CvScalar.YELLOW, 1, CV_AA, 0);
- }
-
- // convert the resulting image back to an array
- ByteArrayOutputStream bout = new ByteArrayOutputStream();
- BufferedImage imgb = BufferedImage();
- ImageIO.write(imgb, "png", bout);
- return ByteArray();
- }
- }
详细的实现细节请阅读英文原文: