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how to use crop using coordinate?

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reza hamzeh
reza hamzeh el 24 de En. de 2020
Editada: Walter Roberson el 24 de En. de 2020
hi. i want to crop the red square from this pic using coordinate. lets suppose coordinate of the top-left point of the red square is w/2 and h/2
where w and h are width and hight of the pic respectively. and width and hight of the red square are 20 pixel. this is my code but it dosent work. plz help me.
pic=imread('b.jpg');
[w, h, numberOfColorChannels] = size(pic);
I=imcrop(pic,[w*0.5 h*0.5 20 20]);
imshow(I)
black.jpg
  2 comentarios
Spencer Chen
Spencer Chen el 24 de En. de 2020
Would be great if you describe what did not work.
Rik
Rik el 24 de En. de 2020
Also, it is probably a good idea to round your coordinates to integers.

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Respuesta aceptada

Walter Roberson
Walter Roberson el 24 de En. de 2020
Editada: Walter Roberson el 24 de En. de 2020
You need
[h, w, numberOfColorChannels] = size(pic);
not
[w, h, numberOfColorChannels] = size(pic);

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