I've always been intrigued by recognition software because I cannot imagine the logic that goes into all of the algorithms. Whether it's voice, face, or other types of detection, people look and sound so different, pictures are shot differently, and from different angles, I cannot fathom how it's all done. Since I already covered booby nudity detection with JavaScript, I thought it would be worth some time to explore face detection. Facebook uses it, so maybe it has application in your websites.
我一直对识别软件很感兴趣，因为我无法想象所有算法中包含的逻辑。 无论是语音，面部还是其他类型的检测，人们的外观和声音都如此不同，照片的拍摄方式也不同，而且从不同的角度看，我无法理解它是如何完成的。 因为我已经讲过 布比 使用JavaScript进行裸露检测 ，我认为值得花一些时间来探索人脸检测。 Facebook使用它，因此它可能已在您的网站中使用。
One face detection library I found is Face Detection by Jay Salvat and Liu Liu. This is a standard jQuery plugin that receives an image and returns an array of coordinates of faces found within the image. Let's have a look at how to use it!
我发现的一个面部检测库是Jay Salvat和Liu Liu的面部检测 。 这是一个标准的jQuery插件，用于接收图像并返回在图像中找到的人脸坐标数组。 让我们看看如何使用它！
View Demo 观看演示Four JS files are required for this jQuery plugin:
此jQuery插件需要四个JS文件：
The faceDetection plugin wraps functionality within the first two JavaScript files, and returns an array of objects which represent the coordinates of the faces within the photo (if any are found). An example would be:
faceDetection插件将功能包装在前两个JavaScript文件中，并返回一个对象数组，这些对象代表照片中人脸的坐标(如果找到)。 一个例子是：
var coords = jQuery("#myImage").faceDetection(); /* Returns: { x: 525 y: 435, width: 144, height: 144, positionX: 532.6353328125226, positionY: 443.240976080536, offsetX: 532.6353328125226, offsetY: 443.240976080536, confidence: 12.93120119, neighbour: undefined, } */You may also add event callbacks to every call:
您还可以向每个调用添加事件回调：
var coords = jQuery("#myImage").faceDetection({ complete: function(image, coords) { // Do something }, error: function() { console.warn("Could not process image"); } });It's up to you what you'd like to do when the faces have been found. You could add a square around the person's face:
发现面Kong后，您要做什么取决于您。 您可以在此人的脸部周围添加一个正方形：
jQuery("img").each(function() { var img = this; // Get faces cooridnates var coordinates = jQuery(img).faceDetection(); // Make boxes if faces are found if(coordinates.length) { coordinates.forEach(function(coord) { jQuery(" ", { css: { position: "absolute", left: coord.positionX + 5 + "px", top: coord.positionY + 5 + "px", width: coord.width + "px", height: coord.height + "px", border: "3px solid white" } }).appendTo(img.parentNode); }); } });There's not much more to it than that!
View DemoI tried to vary the photos I used faceDetection on and as I expected, the results are the not perfect. They are, however, quite good; no software will be perfect for all cases. The software also does not do facial comparison, so you would need to provide suggestions as to the face's identity via another method. For what this plugin is meant to do, however, it does pretty well. I encourage you to give this a try!
.x-secondary-small { display: none; } @media only screen and (max-width: 600px) { .x-secondary { max-height: none; } .x-secondary-large { display: none; } .x-secondary-small { display: block; } }I spent a few months experimenting with different approaches for writing simple, elegant and maintainable media queries with Sass. Each solution had something that I really liked, but I couldn't find one that covered everything I needed to do, so I ventured into creating my...
By David Walsh May 6, 2015This is the hardest thing I've ever had to write, much less admit to myself. I've written resignation letters from jobs I've loved, I've ended relationships, I've failed at a host of tasks, and let myself down in my life. All of those feelings were very...
It's been quite a while since I've written a PHP grabber and the itch finally got to me. This time the victim is the International Movie Database, otherwise known as IMDB. IMDB has info on every movie ever made (or so it seems). Their...
By David Walsh January 19, 2009There's yet another reason to master more than one JavaScript library: you can use some of them together! Since MooTools is prototype-based and jQuery is not, jQuery and MooTools may be used together on the same page. The XHTML and JavaScript jQuery is namespaced so the...
iPad almost burned when browsing the demo page.
David WalshYeah, that will happen with client-side technology like this. In practice, this is better done on the server side, but it’s still fascinating to see on the client side.
Rasmus FløeThe perfect companion article would be about webworkers :D
Alex CrooksYep latest FF got an slow/unresponsive script error while loading the demo. Interesting though!
StanMost facial recognition software is done with neural networks….the varied results are because of a limited data set used in training….in theory they can be nearly as good as people at recognizing faces (same technology for voice recognition, OCR (Object Character Recognition), etc.)..it’s essentially pattern matching. I haven’t seen any good neural networks for javascript though, so this is pretty interesting to me.
Hans AndersIt would be great if the software could also recognize if people wear glasses, ear rings, wrinkles, et cetera. So that you would be able to apply filters on the image library and make selections.
Robin SinghNice work but Slow Script Error on FF
DavidThis is done somewhat quite easy using matlab. Too bad that my signal processing teacher was a bitch and I did not learn anything…
andreyeah and god accidentally forgot to give you brain
folusoany thing on global browser detection am having battles with site displaying on other browsers as it did on my browser
TarlenanThis website http://blog.geotitles.com/2011/08/facebook-like-face-detect
had made a similar tutorial using the same jQuery pluign by Jay Salvat, but they have presented many examples on using the plugin.
May be it is useful for your visitors.
RH.Alathank you for sharing, this is realy one of the complex jQuery plugins, but how the f**k they do it ?? have any one a document of the algorithm ? Thank you.
serkanCan you add sound output in your face detection program.. it say your name..
sathish jayarajHi i would like to recognize only one face from the group photo as well from the single image photo too. So what should i do in the code.
It would be great help if anyone say the solution.
Thanks in advance.
RufusIt works great but when there is no face to detect in a picture it does not trigger the error function, but only the “complete” function.
It does trigger the error function when the pic is below a certain size however.
I tried checking for undefined (and tried null too) in the array like so:
but no dice.
Any suggestions?
I am developing a chrome app so only testing there.
Karthikeyan KNice Tutorial David.. :) you are really rocking.. please share more tutorials on jQuery..
SairamHi David,
The demo no longer works (in Chrome) because you can no longer embed javascript from raw.github.com .
Sairam
VikramHi David Walsh, I am getting the error ‘ this image is invalid’. Can you hint how to solve this problem.
Vikram(when I tried it locally and on localhost)
Justin O'NeillHi David, This doesn’t seem to be working in Chrome at all and in FireFox is spits an error back at me. It did manage to pop out a white border box, however it wasn’t on the face.
ManMan.. hotlinking from github has been disabled. Now your demo doesnt work. Can you update your demo? Cheers!
perfohello, all. How could I do this but without displaying the video on the screen ? I want to detect if someone is in front of the camera and roughly where they are but I don’t need to video to be displayed. Any hints ? Thanks
Kapil GuptaHi David,
Do you have idea that how can we use this one to detect the face shape (like Oval, square, narrow etc…)
Please let me know if you know any API’s for it also…
Thanks
Justin HThe example only highlights one soccer player, the photo with Brad/Angelina, and one photo in the black and white.
Tim MoodyYou could also forego any development and just leverage a pre-existing API service that provides this sort of functionality.
For instance the follow face detection API can be hit from javascript client side or server side.
Face Location https://askmacgyver.com/explore/program/face-location/5w8J9u4z
jQuery("img").each(function() { var img = this; // Get faces cooridnates var coordinates = jQuery(img).faceDetection(); // Make boxes if faces are found if(coordinates.length) { coordinates.forEach(function(coord) { jQuery(" ", { css: { position: "absolute", left: coord.positionX + 5 + "px", top: coord.positionY + 5 + "px", width: coord.width + "px", height: coord.height + "px", border: "3px solid white" } }).appendTo(img.parentNode); }); } });There's not much more to it than that!
View DemoI tried to vary the photos I used faceDetection on and as I expected, the results are the not perfect. They are, however, quite good; no software will be perfect for all cases. The software also does not do facial comparison, so you would need to provide suggestions as to the face's identity via another method. For what this plugin is meant to do, however, it does pretty well. I encourage you to give this a try!
.x-secondary-small { display: none; } @media only screen and (max-width: 600px) { .x-secondary { max-height: none; } .x-secondary-large { display: none; } .x-secondary-small { display: block; } }I spent a few months experimenting with different approaches for writing simple, elegant and maintainable media queries with Sass. Each solution had something that I really liked, but I couldn't find one that covered everything I needed to do, so I ventured into creating my...
By David Walsh May 6, 2015This is the hardest thing I've ever had to write, much less admit to myself. I've written resignation letters from jobs I've loved, I've ended relationships, I've failed at a host of tasks, and let myself down in my life. All of those feelings were very...
It's been quite a while since I've written a PHP grabber and the itch finally got to me. This time the victim is the International Movie Database, otherwise known as IMDB. IMDB has info on every movie ever made (or so it seems). Their...
By David Walsh January 19, 2009There's yet another reason to master more than one JavaScript library: you can use some of them together! Since MooTools is prototype-based and jQuery is not, jQuery and MooTools may be used together on the same page. The XHTML and JavaScript jQuery is namespaced so the...
iPad almost burned when browsing the demo page.
David WalshYeah, that will happen with client-side technology like this. In practice, this is better done on the server side, but it’s still fascinating to see on the client side.
Rasmus FløeThe perfect companion article would be about webworkers :D
Alex CrooksYep latest FF got an slow/unresponsive script error while loading the demo. Interesting though!
StanMost facial recognition software is done with neural networks….the varied results are because of a limited data set used in training….in theory they can be nearly as good as people at recognizing faces (same technology for voice recognition, OCR (Object Character Recognition), etc.)..it’s essentially pattern matching. I haven’t seen any good neural networks for javascript though, so this is pretty interesting to me.
Hans AndersIt would be great if the software could also recognize if people wear glasses, ear rings, wrinkles, et cetera. So that you would be able to apply filters on the image library and make selections.
Robin SinghNice work but Slow Script Error on FF
DavidThis is done somewhat quite easy using matlab. Too bad that my signal processing teacher was a bitch and I did not learn anything…
andreyeah and god accidentally forgot to give you brain
folusoany thing on global browser detection am having battles with site displaying on other browsers as it did on my browser
TarlenanThis website http://blog.geotitles.com/2011/08/facebook-like-face-detect
had made a similar tutorial using the same jQuery pluign by Jay Salvat, but they have presented many examples on using the plugin.
May be it is useful for your visitors.
RH.Alathank you for sharing, this is realy one of the complex jQuery plugins, but how the f**k they do it ?? have any one a document of the algorithm ? Thank you.
serkanCan you add sound output in your face detection program.. it say your name..
sathish jayarajHi i would like to recognize only one face from the group photo as well from the single image photo too. So what should i do in the code.
It would be great help if anyone say the solution.
Thanks in advance.
RufusIt works great but when there is no face to detect in a picture it does not trigger the error function, but only the “complete” function.
It does trigger the error function when the pic is below a certain size however.
I tried checking for undefined (and tried null too) in the array like so:
but no dice.
Any suggestions?
I am developing a chrome app so only testing there.
Karthikeyan KNice Tutorial David.. :) you are really rocking.. please share more tutorials on jQuery..
SairamHi David,
The demo no longer works (in Chrome) because you can no longer embed javascript from raw.github.com .
Sairam
VikramHi David Walsh, I am getting the error ‘ this image is invalid’. Can you hint how to solve this problem.
Vikram(when I tried it locally and on localhost)
Justin O'NeillHi David, This doesn’t seem to be working in Chrome at all and in FireFox is spits an error back at me. It did manage to pop out a white border box, however it wasn’t on the face.
ManMan.. hotlinking from github has been disabled. Now your demo doesnt work. Can you update your demo? Cheers!
perfohello, all. How could I do this but without displaying the video on the screen ? I want to detect if someone is in front of the camera and roughly where they are but I don’t need to video to be displayed. Any hints ? Thanks
Kapil GuptaHi David,
Do you have idea that how can we use this one to detect the face shape (like Oval, square, narrow etc…)
Please let me know if you know any API’s for it also…
Thanks
Justin HThe example only highlights one soccer player, the photo with Brad/Angelina, and one photo in the black and white.
Tim MoodyYou could also forego any development and just leverage a pre-existing API service that provides this sort of functionality.
For instance the follow face detection API can be hit from javascript client side or server side.
Face Location https://askmacgyver.com/explore/program/face-location/5w8J9u4z
翻译自: https://davidwalsh.name/face-detection-jquery
相关资源：jdk-8u281-windows-x64.exe