Как применить DCT к изображению в Python?
1 ответов
С OpenCV:
DCT(src, dst, flags) → None Performs a forward or inverse Discrete Cosine transform of a 1D or 2D floating-point array. Parameters: src (CvArr) – Source array, real 1D or 2D array dst (CvArr) – Destination array of the same size and same type as the source flags (int) – Transformation flags, a combination of the following values CV_DXT_FORWARD do a forward 1D or 2D transform. CV_DXT_INVERSE do an inverse 1D or 2D transform. CV_DXT_ROWS do a forward or inverse transform of every individual row of the input matrix. This flag allows user to transform multiple vectors simultaneously and can be used to decrease the overhead (which is sometimes several times larger than the processing itself), to do 3D and higher-dimensional transforms and so forth.
DCT также доступен в scipy.fftpack.