In order to access pixels, there is some ways to do that, for example:
uchar *ptr;
ptr = cvPtr2D (image, x, y);
// for 3 channels image
ptr[0] = 255; // blue
ptr[1] = 0; // red
ptr[2] = 0; // green
ptr[3] = 0; // alpha
the example above you will color your image to Blue. the same way you can read the value as:
BlueValue = ptr[0];
RedValue = ptr[1];
etc….
hope it helps somebody.
Hardly one of the users of OS X do not know about the functionality of the Quick Look.
However, few people suspect that Quick Look has an interesting hidden feature that is disabled by default.
This hidden feature is called “regime of x-ray folders”, and it works only in OS X 10.5 and 10.6. After its activation, Quick Look, when viewing a folder, will show not only general information, but also its content.
To activate this mode, simply follow the following:
1. run terminal
2. command defaults write com.apple.finder QLEnableXRayFolders 1
3. command killall Finder
This web page is showing how to detect eyes using OpenCV’s boosted cascade of haar-like features. Source code, XML eye classifier, and sample images are available for download.
If you want to setup correctly your OpenCV development environment on Ubuntu. It is worthy to follow the steps described in this website.
