MMACH (lmmach) functions


LIBRARY ROUTINE

lvopen - Do the opening of an image by a set structuring element, with an operation gating mask.

LIBRARY CALL

int
lvkopen(xvimage *img1, mat_str *b_mat, xvimage *img2, int mflg, unsigned long border, xvimage *img3)

INPUT

none

OUTPUT

none

RETURN VALUE

TRUE (1) on success, FALSE (0) on failure

DESCRIPTION

lvopen will do the opening of an image by a set structuring element.. img1 and b are, respectively, the input image and the structuring element; img2 is the gating image, and mflg should be set to 1 if the gating image is to be used. img3 is the output image. A non-zero mask pixel in img2 enables the output pixel to contain the opening. A zero mask pixel in img2 just transfers the value of the corresponding pixel in img1 to the output pixel.

The input, output and mask images must be of the same size, data type, and have the same number of data bands.

ADDITIONAL INFORMATION

none

EXAMPLES

none

SIDE EFFECTS

none

RESTRICTIONS

lvopen can be defined for all data types supported by Khoros, but at the moment it has been implemented just for the bit and unsigned char types. The structuring elements are subsets of the 3x3 matrix and the origin is always at the center of this matrix.

Due to the simultaneous processing of 32 pixels in BIT images, input images of the BIT data type must be converted to a special data structure before the library is called. This can be accomplished by using the format routine. After the library call, the unformat routine can convert the image back to the BIT data type.

MODIFICATION

none

FILES

$MMACH/objects/library/lmmach/src/lvopen.c

SEE ALSO

lmmach(3)

COPYRIGHT

Copyright (C) 1993-1997 Junior Barrera, Roberto Lotufo. All rights reserved.