HDR-Imaging for Welding

For this project I exploited the idea, that a single color filter (here a red filter), will lead to different attenuation factors on the color channels of a Bayern pattern camera sensor. Given that we are only interested in the gray scale information of a scene, we can use this fact to capture impressiv high dynamic range (HDR) images.

Original Scene

Resulting HDR Image

The image on the left shows the scene captured by a standart camera. Here the scene comprimises both a bright light source and some text on the right. Using the suggested HDR technique, we can craft an image which contains both the detailed structure of filament of the light source and the text in readable form. Below you can see the four images channels of the raw bayer image:

For other details on the project, see the Visible Welding Homepage for details.