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clip8 function

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This commit is contained in:
Alexander 2017-08-12 22:12:59 +03:00
parent b6638d8155
commit f71b3a8ed7
1 changed files with 14 additions and 14 deletions
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28
libImaging/Filter.c
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@ -26,6 +26,16 @@
#include "Imaging.h" #include "Imaging.h"
static inline UINT8 clip8(float in)
{
if (in <= 0.0)
return 0;
if (in >= 255.0)
return 255;
return (UINT8) in;
}
Imaging Imaging
ImagingExpand(Imaging imIn, int xmargin, int ymargin, int mode) ImagingExpand(Imaging imIn, int xmargin, int ymargin, int mode)
{ {
@ -134,17 +144,12 @@ ImagingFilter(Imaging im, int xsize, int ysize, const FLOAT32* kernel,
if (xsize == 3) { if (xsize == 3) {
/* 3x3 kernel. */ /* 3x3 kernel. */
for (x = 0; x < im->xsize; x++) for (x = 0; x < im->xsize; x++)
imOut->image[0][x] = im->image8[0][x]; imOut->image8[0][x] = im->image8[0][x];
for (y = 1; y < im->ysize-1; y++) { for (y = 1; y < im->ysize-1; y++) {
imOut->image[y][0] = im->image8[y][0]; imOut->image8[y][0] = im->image8[y][0];
for (x = 1; x < im->xsize-1; x++) { for (x = 1; x < im->xsize-1; x++) {
sum = KERNEL3x3(im->image8, kernel, 1) + offset; sum = KERNEL3x3(im->image8, kernel, 1) + offset;
if (sum <= 0) imOut->image8[y][x] = clip8(sum);
imOut->image8[y][x] = 0;
else if (sum >= 255)
imOut->image8[y][x] = 255;
else
imOut->image8[y][x] = (UINT8) sum;
} }
imOut->image8[y][x] = im->image8[y][x]; imOut->image8[y][x] = im->image8[y][x];
} }
@ -160,12 +165,7 @@ ImagingFilter(Imaging im, int xsize, int ysize, const FLOAT32* kernel,
imOut->image8[y][x] = im->image8[y][x]; imOut->image8[y][x] = im->image8[y][x];
for (; x < im->xsize-2; x++) { for (; x < im->xsize-2; x++) {
sum = KERNEL5x5(im->image8, kernel, 1) + offset; sum = KERNEL5x5(im->image8, kernel, 1) + offset;
if (sum <= 0) imOut->image8[y][x] = clip8(sum);
imOut->image8[y][x] = 0;
else if (sum >= 255)
imOut->image8[y][x] = 255;
else
imOut->image8[y][x] = (UINT8) sum;
} }
for (; x < im->xsize; x++) for (; x < im->xsize; x++)
imOut->image8[y][x] = im->image8[y][x]; imOut->image8[y][x] = im->image8[y][x];