NAME

sobel_x sobel_y - sobel filter an image

PROTOTYPES

unitptr sobel_x( int dx, int dy, unitptr dest)

unitptr sobel_y( int dx, int dy, unitptr dest)

ARGUMENTS

int dx
width of image rectangle
int dy
height of image rectangle
unitptr dest
host unit

RETURN VALUE:

unitptr u pointer to newly created unit

INTERFACE OF CREATED UNIT:

X_in[dx*dy]:
(packed input field) pixel values of source image
X_out[dx*dy]:
(packed output field 0) result image

DESCRIPTION:

Creates unit that computes convolution of rectangular image region of dx*dy pixels given at input field X_in with a 3x3 sobel filter mask and returns result at packed output field X_out.

SEE ALSO:

pic_to_gabor, convolution, laplace

FILE

/amnt/loge/users/nistaff02/nistaff/rhaschke/nst7/man/../o.linux//../foldersrc/nst_filter.c