How to get original image's coordinates X,Y from zoomed image

[ausgo...@hotmail.com]

Hi Everyone,

I am not sure whether this is the correct group to post this topic, but I need your help if all possible:

I have an image file w = 2479, h = 3508, dipx = 300, dixy = 300


To display online, I use a software to make a smaller w = 800, h = 1052, dipx = dipy = 300


Once user uses mouse to draw a rectangle I get the coordinate x=175, y = 202, the retancalar w = 584, h = 52


I would like to know how can I get the original image's x, y, and the rectangle w, h?


Any ideas/suggestions would be highly appreciated


Rob