How to save an m by n array as an m by n resolution image?

Hellos,

I am trying to plot a 2D image of resolution 4096 x 4096 using imshow(data). Due to screen resolution limitation (my laptop screen is 3200x1800 pixels), imshow says it can only display the image at 33% of its original size. When I save the plotted image with save, print or export_fig (third party) commands; the image ends up being of a lower size than 4096 x 4096 because the figure window is 33% of the size of the original image. I urge you to try this.

What I wish is to create an image such that: pixel(1,1) in the image represents the RGB colors corresponding to the value in data(1,1). pixel(4096,1) in the image represents the RGB colors corresponding to the value in data(4096,1). pixel(1,4096) in the image represents the RGB colors corresponding to the value in data(1,4096). pixel(4096,4096) in the image represents the RGB colors corresponding to the value in data(4096,4096).

No borders, no axes. Just the plain conversion of the values in a matrix to its corresponding .png/.jpg/.tiff/.bitmap image maintaining one to one correspondence between the pixels of the image and the elements in variable data.

Your help is appreciated!

Answer 1

[Image Analyst]

Use imwrite(). It can save images even if they're bigger than your screen.

[W.Khan]

Hello Image Analyst, Can you look into this question too? please https://ch.mathworks.com/matlabcentral/answers/411915-how-can-i-extract-a-patch-from-rgb-image-w-r-t-its-binary-image

Thank you