{"id":1966,"date":"2015-02-13T14:50:37","date_gmt":"2015-02-13T13:50:37","guid":{"rendered":"https:\/\/ridgesolutions.ie\/?p=1966"},"modified":"2015-02-13T15:52:18","modified_gmt":"2015-02-13T14:52:18","slug":"a-machine-vision-engineers-take-on-fifty-shades-of-grey-by-james-mahon","status":"publish","type":"post","link":"https:\/\/www.ridgesolutions.ie\/index.php\/2015\/02\/13\/a-machine-vision-engineers-take-on-fifty-shades-of-grey-by-james-mahon\/","title":{"rendered":"A Machine Vision Engineer’s take on Fifty Shades of Grey by James Mahon"},"content":{"rendered":"

A Machine Vision Engineer’s take on Fifty Shades of Grey by James Mahon (generated by pure C source code):<\/p>\n

\"50_shades_of_grey_machine_vision\"<\/a><\/p>\n

And the source code:<\/p>\n

\r\n\/\/\r\n\/\/\r\n\/\/ 50Shades.cpp : Something for the weekend - JM\r\n\/\/  I am sure that you could to this in abaout 6 lines of Python, but here it is in olde C\r\n\/\/\r\n\r\n#include \r\n#include \r\n#include \r\n\r\n#define IMAGE unsigned char\r\n\r\nvoid draw_grey_box ( IMAGE *vram, int x_size, int ix, int iy, int dx, int dy, IMAGE grey )\r\n{\r\n\tunsigned char *ptr;\r\n\tint   y;\r\n\tfor ( y = iy; y < iy+dy; ++y ) {\r\n\t\tptr = vram + ix + y * x_size;\r\n\t\tmemset ( ptr, grey, dx );\r\n\t}\r\n}\r\n\r\n\r\nint save_any_pgm_image2 ( IMAGE *ram, char *file, char *com, int x1, int y_1, int x2, int y2, int X_SIZE )\r\n{\r\n\tint    dx, y;\r\n\tIMAGE  *ptr;\r\n\tFILE   *fd;\r\n\tdx = x2-x1;\r\n\r\n\tif ( (fd = fopen ( file, \"wb\" )) == NULL ) {  \/*  1.29  *\/\r\n\t\tprintf   ( \"save_any_image File <%s> open failed to write\\n\", file );\r\n\t\tperror   ( \"pgm write\" );\r\n\t\treturn -1;\r\n\t}\r\n\tfprintf ( fd, \"P5 #%s\\n%d\\n%d\\n255\\n\", com, dx, y2-y_1 );\r\n\r\n\tfor ( y = y_1; y < y2; y++ ) {             \/*  Write it all out from gram *\/\r\n\t\tptr = ram + x1 + y * X_SIZE;\r\n\t\tif ( fwrite ( ptr, dx, sizeof( IMAGE ), fd ) != sizeof( IMAGE ) ) {\r\n\t\t\tfclose  ( fd );\r\n\t\t\treturn -2;\r\n\t\t}\r\n\t}\r\n\tfclose ( fd );\r\n\r\n\treturn y;\r\n}\r\n\r\n\r\nint main(int argc, char* argv[])\r\n{\r\n\tint x_size = 1024, y_size = 768, i, x, y, dx, dy, nx = 10, ny = 5, ix, iy, grey = 1;\r\n\r\n\tprintf ( \"Image fILE in c:\\\\temp\\n\" );\r\n\tIMAGE *vram;\r\n\tdx = x_size \/ ( nx+1 );\r\n\tdy = y_size \/ ( ny+1 );\r\n\r\n\tvram = (unsigned char *)malloc ( x_size * y_size );\r\n\tmemset ( vram, 0, x_size * y_size );\r\n\r\n\tfor ( y = 0; y < ny; ++y ) {\r\n\t\tfor ( x = 0; x < nx; ++x ) {\r\n\r\n\t\t\tix = x * dx + dx \/ 2;\r\n\t\t\tiy = y * dy + dy \/ 2;\r\n\t\t\tdraw_grey_box ( vram, x_size, ix, iy, dx*9\/10, dy*9\/10, grey*5+3 );\r\n\t\t\t++grey;\r\n\t\t}\r\n\t}\r\n\tsave_any_pgm_image2 ( vram, \"c:\\\\Temp\\\\50_shades.pgm\", \"for Valentines day\", 0, 0, x_size, y_size, x_size );\r\n\r\n\treturn 0;\r\n}\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
A Machine Vision Engineer’s take on Fifty Shades of Grey by James Mahon (generated by pure C source code): And the source code: \/\/ \/\/ \/\/ 50Shades.cpp : Something for the weekend – JM \/\/ I am sure that you could to this in abaout 6 lines of Python, but here it is in olde […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[67,346,78],"class_list":["post-1966","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c","tag-james-mahon","tag-machine-vision"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t