This section describes functions that compare images. Each compare function writes its results to a one-channel
Ipp8uoutput image. The output pixel is set to a non-zero value if the corresponding input pixel(s) satisfy the compare condition; otherwise, the output pixel is set to 0. You can compare either two images, or an image and a constant value, using the following compare conditions: “greater”, “greater or equal”, “less”, “less or equal”, “equal”. Compare condition is specified as a function argument of
IppCmpOptype (see Structures and Enumerators for more information). Images containing floating-point data can also be compared for being equal within a given tolerance
For images with multi-channel data, the compare condition for a given pixel is true only when each color channel value of that pixel satisfies this condition.