Relocating pixels after resizing the image

I am marking some pixels in a low-res version of an image, which is smaller than the original image. Now I want to extract info from the original image using those markers. But no idea how to locate those marker/pixels in the bigger image. Help!

Answer 1

[Image Analyst]

What is the "low res version"? Is it simply a small version of your huge image but just being displayed in a small axes on your figure? And how are you "marking some pixels"? If you're using ginput(), then the same (x,y) will work on your full sized image - there is nothing you need to do other than rounding x,y to the nearest integers so that you have integer rows and columns.

[ImageProcNaive]

I had used the resize function to generate a smaller version of the image, which I referred as the low res version. I used "get(axesHandle,'CurrentPoint')" to obtain the location of the mouse button clicks from the low res image. I have stored the locations of these clicks which I referred as markers. Please let me know if you still have any confusion. Thanks in advance.