Robotic Vision: Rozdiel medzi revíziami
Z SensorWiki
(→Matlab code) |
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| Riadok 67: | Riadok 67: | ||
im = testpattern('squares', 200, 50, 25); | im = testpattern('squares', 200, 50, 25); | ||
| + | |||
| + | im = iread('monalisa.png', 'grey'); | ||
| + | about im | ||
| + | idisp(im) | ||
| + | |||
| + | im(194,276) | ||
| + | ans = 26 | ||
| + | |||
| + | im2 = im(180:210,260:290); | ||
| + | idisp(im2) | ||
| + | |||
| + | lin = im(190,260:290); | ||
| + | plot(lin) | ||
| + | |||
| + | im3 = im(1:4:end,1:4:end); | ||
| + | idisp(im3) | ||
| + | |||
| + | im4 = im(end:-1:1,1:end); | ||
| + | idisp(im4) | ||
</source> | </source> | ||
Verzia zo dňa a času 22:43, 21. november 2015
Support page to the MOOC Course by Peter Corke
Matlab code
im = iread('/path/to/image.jpg');
idisp(im); // special display for the course from the vision package
Compare this
a = 100;
b = 200;
a+b
a-b
a/b
a = uint8(100);
b = uint8(200);
a+b
a-b
a/b
Getting an image from videocamera. Grab and display a image from the camera.
cam = VideoCamera(0);
im = cam.grab();
clear cam // In order to turn the camera off, use the clear function.
Getting an image from movie.
cam = Movie('traffic_sequence.mpg');
cam.grab(); // next sequence image
Creating an image from code
Create a 200x200 matrix of zeros (representing black) and set the first (top, left) element to 1 (representing white). Display the image.
im = zeros(200, 200);
im(1,1) = 1;
idisp(im)
im(150:160,60:70) = 0.5;
idisp(im)
circle = kcircle(30);
idisp(circle)
im = ipaste(im, circle*0.7, [100 30]);
idisp(im)
im = iline(im, [30 40], [150 190], 0.9);
idisp(im)
im = testpattern('rampx', 200);
idisp(im)
im = testpattern('squares', 200, 50, 25);
im = iread('monalisa.png', 'grey');
about im
idisp(im)
im(194,276)
ans = 26
im2 = im(180:210,260:290);
idisp(im2)
lin = im(190,260:290);
plot(lin)
im3 = im(1:4:end,1:4:end);
idisp(im3)
im4 = im(end:-1:1,1:end);
idisp(im4)