Hi,
I would like to create a HDR patch.
A patch that starting from a sequence of images in JPG makes a combined HDR and allows the user to measure the luminance and plot falsecolor.

The patch should be structured like this:

open images as a sequence
read exif and scale exposure / compensate gamma
add images together

use colour scale to show values
save falsecolor image to file

extra:
drag line from two points and read values / create graph.

Any pointer about:
-1- read exif file?
-2- use values in a matrix to create a falsecolor image?

ANy help much appreciated.
Thanks
G