cs129 / hdr

CS129 / Project 5 / HDR

The Algorithm

Generating the HDR Radiance Map

First, I iterate over each exposure. For each exposure, I iterate over all pixels and sum up those values' results from the following equation: (weights(curr_pixel) * (g_red(curr_pixel) - exposure_matrix(curr_pixel,i))). I process the color channels separately. Meanwhile I am also computing the sums of the weights, which after iterating over the exposures are used. Lastly, let us not forgot: e^(hdr_radiance_map).

Global Simple Operator

With decent results, I decided to use the following operator: L/(1+L). After computing this, I use the global scale operator.

Bilateral Filter

I used a brute force method, employing the psuedocode from page 13 of this paper