Dimensions of arrays being concatenated are not consistent. trying to zeropad the image

Question

Sadoon Alwaz 2020-5-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/524384-dimensions-of-arrays-being-concatenated-are-not-consistent-trying-to-zeropad-the-image

评论： Ameer Hamza 2020-5-11

My aim is to crop the portion of image i desire using Drawrectangle and then zeropad the croped image in such a way that every time i crop the image of varaible sizes (no matter what size of image i crop) and the final image comes out to be the croped portion surrounded by zeropaded image to make the final image of size 480x640. eg my if my croped image is

4 5 6

6 5 8

7 8 9

then final image should be 0 0 0 0 0 0 0 0 0 having the size 480x640.

0 0 0 4 5 6 0 0 0

0 0 0 6 5 8 0 0 0

0 0 0 7 8 9 0 0 0

I = imread('pic.PNG');
imshow(I);
g=drawrectangle;
P=g.Position;
x=P(1,1);
y=P(1,2);
w=P(1,3);
h=P(1,4);
II = I(y:y+h,x:x+w);
S=size(II);
LengthII=S(1);
WidthII=S(2);
imshow(II);
zero_matrix = zeros(480-LengthII,640-WidthII);
III = [zero_matrix,II];
imshow(III)

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Answer 1

Ameer Hamza 2020-5-10

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/524384-dimensions-of-arrays-being-concatenated-are-not-consistent-trying-to-zeropad-the-image#answer_431583

在 MATLAB Online 中打开

Use imcrop() and padarray()

I = imread('pears.png');
imshow(I);
g = drawrectangle;
II = imcrop(I, g.Position);
pad_size = [480 640]-size(II, [1 2]);
III = padarray(II, floor(pad_size/2), 'pre');
III = padarray(III, ceil(pad_size/2), 'post');
imshow(III)