Optical asymmetrical median filtering using gray-scale convolution kernels.
Morphological transformations such as erosion and dilation can be performed optically by convolving the binary input image with a binary kernel and then passing the result through an ideal thresholder-hardlimiter. Generalizations result from using gray-scale convolution kernels. It is shown that gray-scale kernels can be used to perform transformations similar to openings and closing with just one convolution instead of the ususal cascade of erosion and dilation normally required for these operations. Optical experimental results are presented.
Hereford
J M
JM
Rhodes
W T
WT