This is a pretty straightforward task in qgis. Just load the image and treat the four corners as ground control points, using the corresponding corners of the polygon.
There's an tutorial here.

On 11/18/2014 11:29 AM, Simen Langseth wrote:
Dear GDAL Users:

I have a raster image which have to be aligned over the polygon.
Both the raster and polygon have the same coordinate system.

The figure shows the raster image which has to be fitted over the RED polygon.

https://drive.google.com/file/d/0B2RqG9tSAAIUc3J5ZDN6V01IcG8/view?usp=sharing

How can I do it guys?

Thanks.

Simen


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