python-pillow/Pillow
1
1
Fork 0
mirror of https://github.com/python-pillow/Pillow.git synced 2025-10-31 16:07:30 +03:00
Code Issues Packages Projects Releases Wiki Activity

3x3 kernel

Browse Source
This commit is contained in:
Alexander 2017-08-13 00:15:57 +03:00
parent b11bba108e
commit f3a33da9f3
1 changed files with 46 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
libImaging/Filter.c
View File

@ -27,6 +27,13 @@
#include "Imaging.h" #include "Imaging.h"
#ifdef WORDS_BIGENDIAN
#define MAKE_UINT32(u0, u1, u2, u3) (u3 | (u2<<8) | (u1<<16) | (u0<<24))
#else
#define MAKE_UINT32(u0, u1, u2, u3) (u0 | (u1<<8) | (u2<<16) | (u3<<24))
#endif
static inline UINT8 clip8(float in) static inline UINT8 clip8(float in)
{ {
if (in <= 0.0) if (in <= 0.0)
@ -89,7 +96,7 @@ void
ImagingFilter3x3(Imaging imOut, Imaging im, const float* kernel, ImagingFilter3x3(Imaging imOut, Imaging im, const float* kernel,
float offset) float offset)
{ {
#define KERNEL3x3(in_1, in, in1, kernel, d) ( \ #define KERNEL3x3(in_1, in, in1, x, kernel, d) ( \
(UINT8) in1[x-d] * kernel[0] + \ (UINT8) in1[x-d] * kernel[0] + \
(UINT8) in1[x] * kernel[1] + \ (UINT8) in1[x] * kernel[1] + \
(UINT8) in1[x+d] * kernel[2] + \ (UINT8) in1[x+d] * kernel[2] + \
@ -100,7 +107,7 @@ ImagingFilter3x3(Imaging imOut, Imaging im, const float* kernel,
(UINT8) in_1[x] * kernel[7] + \ (UINT8) in_1[x] * kernel[7] + \
(UINT8) in_1[x+d] * kernel[8]) (UINT8) in_1[x+d] * kernel[8])
int x, y = 0; int x = 0, y = 0;
memcpy(imOut->image[0], im->image[0], im->linesize); memcpy(imOut->image[0], im->image[0], im->linesize);
if (im->bands == 1) { if (im->bands == 1) {
@ -112,13 +119,47 @@ ImagingFilter3x3(Imaging imOut, Imaging im, const float* kernel,
out[0] = in0[0]; out[0] = in0[0];
for (x = 1; x < im->xsize-1; x++) { for (x = 1; x < im->xsize-1; x++) {
out[x] = clip8(KERNEL3x3(in_1, in, in1, kernel, 1) + offset); float ss = KERNEL3x3(in_1, in, in1, x, kernel, 1);
out[x] = clip8(ss + offset);
} }
out[x] = in0[x]; out[x] = in0[x];
} }
} else if (im->bands == 3) { } else {
printf("%s\n", "hi there");
for (y = 1; y < im->ysize-1; y++) { for (y = 1; y < im->ysize-1; y++) {
UINT8* in_1 = (UINT8*) im->image[y-1];
UINT8* in0 = (UINT8*) im->image[y];
UINT8* in1 = (UINT8*) im->image[y+1];
UINT32* out = (UINT32*) imOut->image[y];
out[0] = ((UINT32*) in0)[0];
if (im->bands == 2) {
for (x = 1; x < im->xsize-1; x++) {
float ss0 = KERNEL3x3(in_1, in, in1, x*4+0, kernel, 4);
float ss3 = KERNEL3x3(in_1, in, in1, x*4+3, kernel, 4);
out[x] = MAKE_UINT32(
clip8(ss0 + offset), 0, 0, clip8(ss3 + offset));
}
} else if (im->bands == 3) {
for (x = 1; x < im->xsize-1; x++) {
float ss0 = KERNEL3x3(in_1, in, in1, x*4+0, kernel, 4);
float ss1 = KERNEL3x3(in_1, in, in1, x*4+1, kernel, 4);
float ss2 = KERNEL3x3(in_1, in, in1, x*4+2, kernel, 4);
out[x] = MAKE_UINT32(
clip8(ss0 + offset), clip8(ss1 + offset),
clip8(ss2 + offset), 0);
}
} else if (im->bands == 4) {
for (x = 1; x < im->xsize-1; x++) {
float ss0 = KERNEL3x3(in_1, in, in1, x*4+0, kernel, 4);
float ss1 = KERNEL3x3(in_1, in, in1, x*4+1, kernel, 4);
float ss2 = KERNEL3x3(in_1, in, in1, x*4+2, kernel, 4);
float ss3 = KERNEL3x3(in_1, in, in1, x*4+3, kernel, 4);
out[x] = MAKE_UINT32(
clip8(ss0 + offset), clip8(ss1 + offset),
clip8(ss2 + offset), clip8(ss3 + offset));
}
}
out[x] = ((UINT32*) in0)[x];
} }
} }
memcpy(imOut->image[y], im->image[y], im->linesize); memcpy(imOut->image[y], im->image[y], im->linesize);