Example:Hough transform/C: Difference between revisions
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=={{Programming-example-page|Hough transform|language=C}}== |
==={{Programming-example-page|Hough transform|language=C}}=== |
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{{trans|Tcl}} |
{{trans|Tcl}} |
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(Tested only with the pentagon image given) |
(Tested only with the pentagon image given) |
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< |
<syntaxhighlight lang="c">#include <stdio.h> |
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#include <stdlib.h> |
#include <stdlib.h> |
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#include <stdint.h> |
#include <stdint.h> |
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return EXIT_SUCCESS; |
return EXIT_SUCCESS; |
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}</ |
}</syntaxhighlight> |
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Output image (but with white background): |
Output image (but with white background): |
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<br style="clear:both" /> |
<br style="clear:both" /> |
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=== |
===Alternative version=== |
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[[file:penta-hugh.png|thumb]][[file:hugh-lines-in.png|thumb]][[file:hugh-lines-out.png|thumb]] |
[[file:penta-hugh.png|thumb]][[file:hugh-lines-in.png|thumb]][[file:hugh-lines-out.png|thumb]] |
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This code is a little to long to my liking, because I had to put some ad hoc stuff that should be better served by libraries. But you don't want to see libpng code here, trust me. |
This code is a little to long to my liking, because I had to put some ad hoc stuff that should be better served by libraries. But you don't want to see libpng code here, trust me. |
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< |
<syntaxhighlight lang="c">#include <stdio.h> |
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#include <stdlib.h> |
#include <stdlib.h> |
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#include <unistd.h> |
#include <unistd.h> |
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/* not going to free memory we used: OS can deal with it */ |
/* not going to free memory we used: OS can deal with it */ |
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return 0; |
return 0; |
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}</ |
}</syntaxhighlight> |
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This program takes a pnm file (binary, either P5 or P6) and does the transformation, then dump output onto stdout. Sample images below are output from the pentagram; sample lines with added noise; output of processing that. Both output were with 1.5 gamma. |
This program takes a pnm file (binary, either P5 or P6) and does the transformation, then dump output onto stdout. Sample images below are output from the pentagram; sample lines with added noise; output of processing that. Both output were with 1.5 gamma. |
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