DESCRIPTIONComputes a pointwise subtraction of two images. If one of the images has only one channel (black&white) and the other has three channels (RGB), then the single channel image is promoted to three channel by placing zeros in the second and third channel.
Port: First Img In
Port: Second Img In
Port: Img Out
subtraction (first - second)
SEE ALSOAddImg MultImg DivImg NegImg ComplementImg PowerImg LogImg ExpImg
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