MMACH (lmmach) functions
LIBRARY ROUTINE
lvintersec - Do the inf of two images pixel by pixel with an operation gating mask.
LIBRARY CALL
int
lvinf(xvimage *img1, xvimage *img2, int img2_flg, int c, xvimage *img3, int mflg, xvimage *img4)
INPUT
none
OUTPUT
none
RETURN VALUE
TRUE (1) on success, FALSE (0) on failure
DESCRIPTION
vinf
will do the inf of two images pixel by pixel.
img1 and img2 are the input images; img3 is the gating image, and mflg should be set to 1 if the gating image is to be used. img4 is the output image. An optional parameter (that will represent a constant image) can be entered instead of img2. Note that img1 or img2 can be used for both the input and the resulting output xvimage structure, in order to save space.
A non-zero mask pixel in img3 enables the output pixel to contain
the inf. A zero mask pixel in img3 just transfers the value
of the corresponding pixel in img1 to the output pixel.
The two input images must be of the same size, data type, and have
the same number of data bands, as must the optional mask and output images.
ADDITIONAL INFORMATION
none
EXAMPLES
none
SIDE EFFECTS
none
RESTRICTIONS
lvinf
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.
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
Port to new toolbox version and constant image option added by Adriano Nagelschmidt Rodrigues and Luiz Fernando Vieira
FILES
$MMACH/objects/library/lmmach/src/lvintersec.c
SEE ALSO
lmmach(3)
COPYRIGHT
Copyright (C) 1993-1997 Junior Barrera, Roberto Lotufo. All rights reserved.