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Ingy döt Net 2013-10-27 22:24:23 +00:00
parent 6f050a029e
commit 776bba907c
3887 changed files with 59894 additions and 7280 deletions
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9
Task/Hough-transform/D/hough-transform.d
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@ -2,7 +2,7 @@ import std.math, grayscale_image;
Image!Gray houghTransform(in Image!Gray im,
in size_t hx=460, in size_t hy=360)
/*pure nothrow*/ in {
pure nothrow in {
assert(im !is null);
assert(hx > 0 && hy > 0);
assert((hy & 1) == 0, "hy argument must be even.");
@ -16,8 +16,7 @@ Image!Gray houghTransform(in Image!Gray im,
foreach (immutable y; 0 .. im.ny) {
foreach (immutable x; 0 .. im.nx) {
// if (im[x, y] == Gray.max) // Not pure.
if (im[x, y] == Gray(255))
if (im[x, y] == Gray.white)
continue;
foreach (immutable iTh; 0 .. hx) {
immutable double th = dTh * iTh;
@ -32,8 +31,8 @@ Image!Gray houghTransform(in Image!Gray im,
}
void main() {
auto im = new Image!RGB;
loadPPM6(im, "Pentagon.ppm")
(new Image!RGB)
.loadPPM6("Pentagon.ppm")
.rgb2grayImage()
.houghTransform()
.savePGM("Pentagon_hough.pgm");