Working with ofxCv images

The main object of computer vision is the image. So before diving into image processing and analysis, we should learn how to work with OpenCV-related images freely. We will consider images of classes ofxCvColorImage, ofxCvGrayscaleImage, ofxCvFloatImage, and ofxCvShortImage. These class names have the prefix ofxCv, so we will call them ofxCv images. To be precise, we will assume that we have these image objects:

ofxCvColorImage image, image2;                //Color images
ofxCvGrayscaleImage grayImage, grayImage2;    //Grayscale images
ofxCvFloatImage floatImage;                   //Float-type image
ofxCvShortImage shortImage;  //Image with "unsigned short" pixels

It is convenient to group functions and operations into several groups.

Image initializing

You always need to initialize an image before using it for the first time. Let us look at a few functions used to initialize images:

• The allocate( w, h ) function initializes the image with width w and height h pixels...