Exercise on High Dynamic Range (HDR) imaging

Load a sequence of images of the same subject with different time of exposure and combine them it in a single gray level image.

The images have been taken from http://en.wikipedia.org/wiki/High-dynamic-range_imaging

1. Download the images:
   • 1280px-StLouisArchMultExpEV-4.72.JPG
   • 1280px-StLouisArchMultExpEV-1.82.JPG
   • 1280px-StLouisArchMultExpEV+1.51.JPG
   • 1280px-StLouisArchMultExpEV+4.09.JPG
   and save them in the working directory.
2. Load and convert them in gray levels representation.
3. Display the images and observe their appearance.
4. Combine them in a single gray-level image, using a method of your own invention.
5. Save the image on a file.

A possible solution.

Note: in order to minimize the developing time, a low resolution version of the images can be used:

• 240px-StLouisArchMultExpEV-4.72.JPG
• 240px-StLouisArchMultExpEV-1.82.JPG
• 240px-StLouisArchMultExpEV+1.51.JPG
• 240px-StLouisArchMultExpEV+4.09.JPG