Debayer on CUDA

Main Points

• Converts 8/16-bit Raw Bayer images to 24/48-bit RGB
• Can do that really fast on NVIDIA GPU, much faster than on any CPU
• High quality image debayering
• Immediate time measurements for each algorithm
• Makes comparison with etalon images and calculates PSNR/MSE

What's unique in GPU Debayer software

• This is, probably, the fastest debayer
• Sofisticated algorithms with high PSNR and low artifacts
• Simple to use, fast to work and easy to check
• Free for personal and educational (including non-profit organization) use
• Testing tool to check quality, timing and performance of debayer algorithms prior to developing heavy loaded services for raw image processing
• Created by company with years of CUDA experience and world-class achievements in the field

GPU Debayer Software Features

• All Bayer mosaic patterns for input data supported (RGGB, BGGR, GBRG, GRBG)
• Mosaic algorithm to prepare CFA input image from any 24/48-bit PPM image
• Read 8-bit input CFA image data from HDD/SSD/RAID in PGM format
• Output format: 24/48-bit PPM
• Minimum image resolution 128 x 128 pixels
• Maximum image resolution up to 12k x 12k pixels
• Debayer quality for the following algorithms:
  • HQLI debayer (High Quality Linear Interpolation, window 5×5) – avr. PSNR ~ 36 dB (SSIM ~ 0.965) for Kodak data set
  • L7 debayer (High Quality Linear Interpolation, window 7×7) – avr. PSNR ~ 37.1 dB (SSIM ~ 0.971) for Kodak data set
  • DFPD debayer (Directional Filtering and a Posteriori Decision, window 11×11) – avr. PSNR ~ 39 dB (SSIM ~ 0.978) for Kodak data set
  • MG debayer (Multiple Gradients, window 23×23) – avr. PSNR ~ 40.5 dB for Kodak data set
• Peak performance (GPU computations only, for 62 MPix resolution, 16-bit image, no batch, no streaming) on NVIDIA GeForce RTX 4090:
  • HQLI debayer – up to 69 GPix/s
  • L7 debayer – up to 62 GPix/s
  • DFPD debayer – up to 48 GPix/s
  • MG debayer – up to 20 GPix/s
• Quality measurements: MSE and PSNR
• Timing and performance measurements for each algorithm
• Batch mode, pyramid images and tiling for multiple camera systems with realtime image debayer – option
• Command-line demo application for Windows-10/11 and Linux Ubuntu, L4T
• Compatibility with NVIDIA Jetson