feature-detection

I am trying to find a script that detects if a device places position: fixed elements relative to the ViewPort and not to the entire document. Currently, standard desktop browsers and Mobile Safari (for iOS 5) do so, whereas Android devices place the fixed elements relative to the entire document. I have found a couple of tests to detect this, but none of the seem to work: http://kangax.github.com/cft/ Gives me a false positive when I pass it from an Android device. https://gist.github.com/1221602 Gives me a false negative when I pass it in an iPhone with iOS 5. Does anybody know where to find

According to my research: "WebView" can disable "opening links in new windows/tabs". WebView is used by native app developers to display webpages within their app(see Twitter's app). Detecting WebView via user agent doesn't work consistently and isn't a best practice anyway. Simply attempting to open a new window with JS triggers popup blockers; making it an unreliable way to test if a new window can be opened. I need to detect when this feature is not available. Impossible? Additional Explanation I'm trying to detect whether I can open a new window via target=_blank. For example, UIWebView

I would like to use some blob detection in my application which is written in Java and thus using JavaCV instead of OpenCV . I found many classes like: SimpleBlobDetector , CvBlobDetector , CvBlob , ... but I can't find any tutorial or demo/example code to use these in Java. Could anyone please tell me how to use these as I can't figure it out and there's no good documentation for them. Thanks! happyburnout I am just in this moment working on the same problem and have a first solution. There's a lot of approaches out there but unfortunately most of them are ugly and slow. My main goal to this

Everywhere in features2D classes I see terms query and train . For example matches have trainIdx and queryIdx , and Matchers have train() method. I know the definition of words train and query in English, but I can't understand the meaning of this properties or methods. P.S. I understand, that it's very silly question, but maybe it's because English is not my native language. To complete sansuiso's answer, I suppose the reason for choosing these names should be that in some application we have got a set of images (training images) beforehand, for example 10 images taken inside your office. The

I want to use the svm classifier for facial expression detection. I know opencv has a svm api, but I have no clue what should be the input to train the classifier. I have read many papers till now, all of them says after facial feature detection train the classifier. so far what I did, Face detection, 16 facial points calculation in every frame. below is an output of facial feature detection![enter image description A vector which holds the features points pixel address Note: I know how I can train the SVM only with positive and negative images, I saw this code here , But I don't know how I

I'm spending considerable time in making my UI to work with keyboard input only. But in the end I'm not sure whether I can rely on the assumption that Android devices all have touch screens. Is there a way to determine if an Android device has a touch screen? You should research the existing devices and read the Android Compatibility Definition Document (CDD) and decide for yourself. I have spent some considerable time trying to figure out this problem for myself. The posters above are correct that Android already powers some non-touch devices and will power Google TV in the near future, but