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Update confidence connected components to use brain scan image by 9prady9 · Pull Request #2968 · arrayfire/arrayfire · GitHub

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Update confidence connected components to use brain scan image #2968

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9prady9 merged 1 commit into from
Jul 9, 2020
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Update confidence connected components to use brain scan image #2968

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2 changes: 1 addition & 1 deletion assets
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Submodule assets updated 2 files
+5 −3 examples/images/README.md
+ − examples/images/depression.jpg
72 changes: 42 additions & 30 deletions examples/image_processing/confidence_connected_components.cpp
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Expand Up @@ -15,40 +15,52 @@

using namespace af;

array normalize01(const array& in) {
float min = af::min<float>(in);
float max = af::max<float>(in);
return (in - min) / (max - min);
}

void markCrossHair(array& in, const unsigned x, const unsigned y,
const float val) {
const int draw_len = 5;
for (int i = -1; i < 2; i++) {
in(x + i, seq(y - draw_len, y + draw_len), 0) = val;
in(x + i, seq(y - draw_len, y + draw_len), 1) = 0.f;
in(x + i, seq(y - draw_len, y + draw_len), 2) = 0.f;

in(seq(x - draw_len, x + draw_len), y + i, 0) = val;
in(seq(x - draw_len, x + draw_len), y + i, 1) = 0.f;
in(seq(x - draw_len, x + draw_len), y + i, 2) = 0.f;
}
}

int main(int argc, char* argv[]) {
try {
unsigned radius = 3;
unsigned multiplier = 3;
int iter = 5;

array A = loadImage(ASSETS_DIR "/examples/images/donut.png", false);

unsigned seedx = 132;
unsigned seedy = 132;
array ring =
confidenceCC(A, 1, &seedx, &seedy, radius, multiplier, iter, 255);

seedx = 152;
seedy = 152;
array sxArr(dim4(1), &seedx);
array syArr(dim4(1), &seedy);
array core =
confidenceCC(A, sxArr, syArr, radius, multiplier, iter, 255);

seedx = 15;
seedy = 15;
unsigned seedcoords[] = {15, 15};
array seeds(dim4(1, 2), seedcoords);
array background =
confidenceCC(A, seeds, radius, multiplier, iter, 255);

af::Window wnd("Confidence Connected Components demo");
unsigned multiplier = 2;
int iter = 3;

array input =
loadImage(ASSETS_DIR "/examples/images/depression.jpg", false);
array normIn = normalize01(input);

unsigned seedx = 162;
unsigned seedy = 126;
array blob = confidenceCC(input, 1, &seedx, &seedy, radius, multiplier,
iter, 255);

array colorIn = colorSpace(normIn, AF_RGB, AF_GRAY);
array colorOut = colorSpace(blob, AF_RGB, AF_GRAY);

markCrossHair(colorIn, seedx, seedy, 1);
markCrossHair(colorOut, seedx, seedy, 255);

af::Window wnd("Confidence Connected Components Demo");
while (!wnd.close()) {
wnd.grid(2, 2);
wnd(0, 0).image(A, "Input");
wnd(0, 1).image(ring, "Ring Component - Seed(132, 132)");
wnd(1, 0).image(core, "Center Black Hole - Seed(152, 152)");
wnd(1, 1).image(background, "Background - Seed(15, 15)");
wnd.grid(1, 2);
wnd(0, 0).image(colorIn, "Input Brain Scan");
wnd(0, 1).image(colorOut, "Region connected to Seed(162, 126)");
wnd.show();
}
} catch (af::exception& e) {
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