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tracking a math bug in filters3x3

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tth
2021-02-23 03:49:24 +01:00
parent c6f10d642a
commit d867b905a8
4 changed files with 41 additions and 19 deletions
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33
funcs/tests.c
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@@ -323,7 +323,7 @@ FimgFilter3x3 filter_a = {
{ 1.0, 1.0, 1.0,
1.0, -3.0, 1.0,
1.0, 1.0, 1.0 },
8.0, 0.0
9.0, 0.0
};
@@ -332,10 +332,19 @@ FimgFilter3x3 filter_b = {
{ -2.0, -1.0, 0.0,
-1.0, 3.0, 1.0,
0.0, 1.0, 2.0 },
8.0, 0.0
8.0, 0.0
};
FimgFilter3x3 filter_c = {
{
2.0, 1.0, 0.0,
1.0, 0.0, -1.0,
0.0, -1.0, -2.0,
},
1.0, 8.0
};
if (NULL != infile) {
fprintf(stderr, "%s: loading %s\n", __func__, infile);
foo = fimg_create_from_dump(infile, &src);
@@ -351,6 +360,8 @@ else {
}
// fimg_save_as_png(&src, "test.png", 0);
foo = fimg_count_negativ(&src);
fprintf(stderr, "%s: source have %d negs\n", __func__, foo);
foo = fimg_clone(&src, &dst, 0);
if (foo) {
@@ -359,21 +370,27 @@ if (foo) {
}
fimg_filter_3x3(&src, &dst, &filter_a);
foo = fimg_clamp_negativ(&dst);
if (foo) {
fprintf(stderr, "clamped %d negative pixels\n", foo);
fprintf(stderr, "A clamped %d negative pixels\n", foo);
}
// foo = fimg_save_as_png(&dst, "f3x3a.png", 0);
foo = fimg_save_as_png(&dst, "f3x3a.png", 0);
// foo = fimg_save_as_pnm(&dst, "f3x3a.pnm", 0);
fimg_filter_3x3(&src, &dst, &filter_b);
foo = fimg_clamp_negativ(&dst);
if (foo) {
fprintf(stderr, "clamped %d negative pixels\n", foo);
fprintf(stderr, "B clamped %d negative pixels\n", foo);
}
// foo = fimg_save_as_png(&dst, "f3x3b.png", 0);
foo = fimg_save_as_png(&dst, "f3x3b.png", 0);
// foo = fimg_save_as_pnm(&dst, "f3x3a.pnm", 0);
fimg_filter_3x3(&src, &dst, &filter_c);
foo = fimg_clamp_negativ(&dst);
if (foo) {
fprintf(stderr, "C clamped %d negative pixels\n", foo);
}
foo = fimg_save_as_png(&dst, "f3x3b.png", 0);
// foo = fimg_save_as_pnm(&dst, "f3x3a.pnm", 0);
fimg_destroy(&src); fimg_destroy(&dst);