162 lines
4.6 KiB
Objective-C
162 lines
4.6 KiB
Objective-C
#! /usr/bin/env octave
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printf("OpenCV Octave version of drawing\n");
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## import the necessary things for OpenCV
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cv;
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highgui;
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function ret=random_color ()
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ret = CV_RGB(int32(rand()*255), int32(rand()*255), int32(rand()*255));
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endfunction
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## some "constants"
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width = 1000;
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height = 700;
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window_name = "Drawing Demo";
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number = 100;
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delay = 5;
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line_type = cv.CV_AA; # change it to 8 to see non-antialiased graphics
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## create the source image
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image = cv.cvCreateImage (cv.cvSize (width, height), 8, 3);
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## create window and display the original picture in it
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highgui.cvNamedWindow (window_name, 1);
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cv.cvSetZero (image);
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highgui.cvShowImage (window_name, image);
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## draw some lines
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for i=0:number-1,
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pt1 = cv.cvPoint (int32(rand() * 2 * width - width),
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int32(rand() * 2 * height - height));
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pt2 = cv.cvPoint (int32(rand() * 2 * width - width),
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int32(rand() * 2 * height - height));
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cv.cvLine (image, pt1, pt2,
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random_color (),
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int32(rand() * 10),
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line_type, 0);
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highgui.cvShowImage (window_name, image);
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highgui.cvWaitKey (delay);
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endfor
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## draw some rectangles
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for i=0:number-1,
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pt1 = cv.cvPoint (int32(rand() * 2 * width - width),
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int32(rand() * 2 * height - height));
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pt2 = cv.cvPoint (int32(rand() * 2 * width - width),
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int32(rand() * 2 * height - height));
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cv.cvRectangle (image, pt1, pt2,
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random_color (),
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int32(rand() * 10 - 1),
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line_type, 0);
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highgui.cvShowImage (window_name, image);
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highgui.cvWaitKey (delay);
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endfor
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## draw some ellipes
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for i=0:number-1,
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pt1 = cv.cvPoint (int32(rand() * 2 * width - width),
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int32(rand() * 2 * height - height));
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sz = cv.cvSize (int32(rand() * 200),
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int32(rand() * 200));
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angle = rand() * 1000 * 0.180;
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cv.cvEllipse (image, pt1, sz, angle, angle - 100, angle + 200,
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random_color (),
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int32(rand() * 10 - 1),
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line_type, 0);
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highgui.cvShowImage (window_name, image);
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highgui.cvWaitKey (delay);
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endfor
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## init the list of polylines
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nb_polylines = 2;
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polylines_size = 3;
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pt = cell(1, nb_polylines);
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for a=1:nb_polylines,
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pt{a} = cell(1,polylines_size);
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endfor
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## draw some polylines
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for i=0:number-1,
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for a=1:nb_polylines,
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for b=1:polylines_size,
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pt {a}{b} = cv.cvPoint (int32(rand() * 2 * width - width), \
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int32(rand() * 2 * height - height));
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endfor
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endfor
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cv.cvPolyLine (image, pt, 1, random_color(), int32(rand() * 8 + 1), line_type, 0);
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highgui.cvShowImage (window_name, image);
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highgui.cvWaitKey (delay);
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endfor
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## draw some filled polylines
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for i=0:number-1,
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for a=1:nb_polylines,
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for b=1:polylines_size,
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pt {a}{b} = cv.cvPoint (int32(rand() * 2 * width - width),
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int32(rand() * 2 * height - height));
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endfor
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endfor
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cv.cvFillPoly (image, pt, random_color (), line_type, 0);
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highgui.cvShowImage (window_name, image);
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highgui.cvWaitKey (delay);
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endfor
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## draw some circles
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for i=0:number-1,
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pt1 = cv.cvPoint (int32(rand() * 2 * width - width),
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int32(rand() * 2 * height - height));
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cv.cvCircle (image, pt1, int32(rand() * 300), random_color (), \
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int32(rand() * 10 - 1), line_type, 0);
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highgui.cvShowImage (window_name, image);
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highgui.cvWaitKey (delay);
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endfor
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## draw some text
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for i=0:number-1,
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pt1 = cv.cvPoint (int32(rand() * 2 * width - width), \
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int32(rand() * 2 * height - height));
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font = cv.cvInitFont (int32(rand() * 8), \
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rand() * 100 * 0.05 + 0.01, \
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rand() * 100 * 0.05 + 0.01, \
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rand() * 5 * 0.1, \
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int32(rand() * 10), \
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line_type);
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cv.cvPutText (image, "Testing text rendering!", \
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pt1, font, \
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random_color ());
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highgui.cvShowImage (window_name, image);
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highgui.cvWaitKey (delay);
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endfor
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## prepare a text, and get it's properties
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font = cv.cvInitFont (cv.CV_FONT_HERSHEY_COMPLEX, \
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3, 3, 0.0, 5, line_type);
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[text_size, ymin] = cv.cvGetTextSize ("OpenCV forever!", font);
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pt1.x = int32((width - text_size.width) / 2);
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pt1.y = int32((height + text_size.height) / 2);
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image2 = cv.cvCloneImage(image);
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## now, draw some OpenCV pub ;-)
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for i=0:255-1,
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cv.cvSubS (image2, cv.cvScalarAll (i), image, []);
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cv.cvPutText (image, "OpenCV forever!",
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pt1, font, cv.cvScalar (255, i, i));
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highgui.cvShowImage (window_name, image);
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highgui.cvWaitKey (delay);
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endfor
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## wait some key to end
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highgui.cvWaitKey (0);
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