Position (X,Y) of cropping window using randomWindow2d

Question

Kamil Krzywinski 2022-8-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1778985-position-x-y-of-cropping-window-using-randomwindow2d

回答： Image Analyst 2022-8-16

Hi,

I'm using randomWindow2d to crop my image multiple times. However, I need to know the position (X,Y) of the cropping window to use it in further analysis. Is there any possibility to find or get this information? I mean, for example the center position (X,Y) of the cropping window in relation to my orginal image?

The code looks almost the same as on the website:

I = imread("strawberries.jpg");

imshow(I)

inputSize = size(I);

scale = [0.2 0.2];

dimensionRatio = [1 1;1 1];

rect = randomWindow2d(inputSize,"Scale",scale,"DimensionRatio",dimensionRatio);

Icrop = imcrop(I,rect);

imshow(Icrop);

imwrite(Icrop,'strawb_crop.jpg');

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Kamil Krzywinski 2022-8-16

The two corners of the random rectangle are hiden in the formula and the position of them is visible in command window when you remove ";" after the formula. Just in case if some wants to find it.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2022-8-16

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1778985-position-x-y-of-cropping-window-using-randomwindow2d#answer_1027545

To get the coordinates in the original matrix you'd need to add the xLeft and yTop of the prior crops to those of the current crop. For example if you cropped at x=100 the first time, and now on the cropped image you crop at x=10, that is x=100+10 = 110 of the original image.