如何在matlab中从图像中获取部分？

我有一张512x256的图像。 我想从这个图像i中得到一些像切片的部分。

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就像我想要大小为512x50的I1一样。

要获取包含前50列和所有行的切片，请执行以下操作

sliceOfImage = originalImage(:,1:50)

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要获取包含列100到149的切片，请调用

sliceOfImage = originalImage(:,100:149)

等等

x = [1:50]; % define the scope of x-axis (the "columns") for the portion of the image
y = [1:512]; %define the scope of y-axis (the "rows") for the portion of the image

I1 = I(x,y,:); % Create I1, the desired portion of the image. Assuming the original image is of RGB and you need to access all 3 colors.