Bilateral Filter for Contrast Reduction

HDR Imaging

This project is an implementation of a fast bilateral filter for contrast reduction (which can be used to display HDR images). The technique implemented is discussed in [1]. For a complete project desription refer [2]. Broadly the steps involved are:

1. Implementation of a bilateral filter
2. Downsampling in spatial and intensity domains
3. Tone mapping using the bilateral filter by using detail and base components of the image

Usage

To compute the response of the bilateral filter run using, python run_bf.py --imagepath PATH_TO_IMAGE

To perform contrast reduction on an image run, python run_bf_tonemap.py --imagepath PATH_TO_IMAGE

Results

Bilateral Filtering

                                 Fig.1 - (Left) Original Image (Right) Filtered Image 

Contrast Reduction

                                 Fig.2 - (Left) Original Image (Right) Filtered Image 

                                 Fig.3 - (Left) Original Image (Right) Filtered Image 

References

[1] Frédo Durand, Julie Dorsey - Fast Bilateral Filtering for the Display of High-Dynamic-Range
[2] Deepankar C. - Bilateral Filter for Contrast Reduction