Resize image ,but xy axis not start with 0.

I'm trying to resize the image. Now I using this code to resize

img = imread('color3.jpg');
img2=rgb2gray(img)
resizedimage = imresize(img2,[40 60]);

From this I got image, x-axis from 0 to 60 and y-axis 0 to 40.

But I want x-axis from 30 to 60 and y-axis 10 to 40.

How can I do that?

Answer 1

[Image Analyst]

Not sure what you're talking about. The first row or column of a matrix is 1, not 0. Why/where are you seeing zero?

This works and you can see from the tick marks and counting over from column 10 to the first column that the first column is 1.

img = imread('peppers.png');
img2=rgb2gray(img);
resizedimage = imresize(img2,[40 60]);
imshow(resizedimage, 'InitialMagnification', 1000);
axis('on', 'image');

[Bheem Atipanan]

img = imread('color3.jpg');
img2=rgb2gray(img);
resizedimage = imresize(img2,[20 40]);
figure;
I2=flipud(resizedimage)
imshow(I2);axis on
set(gca,'YDir','normal')

And this is what I got

But I want to change X axis value to 10 - 30 and for Y axis to 10 - 20 .

[Image Analyst]

When you call imshow, pass in XData and YData.

img = imread('peppers.png');
img2=rgb2gray(img);
resizedimage = imresize(img2,[40 60]);
imshow(resizedimage, 'InitialMagnification', 1000, 'XData', [10, 30], 'YData', [10, 20]);
% Flip y axis
axis xy
axis('on', 'image');

[Bheem Atipanan]

How can I save this imshow into workspace using command?

[Image Analyst]

What does that mean? img is already in the workspace. To save the image to disk you can use imwrite(). To save the axes or figure (with title, tick labels, etc.) use saveas() or exportgraphics (R2020b or later).

Answer 2

[Jonas]

what about

img2(10:40,30:60)?

[Bheem Atipanan]

No, it's not working. Also I want to resize, but this command cut some parts out.