Video and Vision Processing Suite Intel® FPGA IP User Guide

ID 683329
Date 7/08/2024
Public
Document Table of Contents
1. About the Video and Vision Processing Suite 2. Getting Started with the Video and Vision Processing IPs 3. Video and Vision Processing IPs Functional Description 4. Video and Vision Processing IP Interfaces 5. Video and Vision Processing IP Registers 6. Video and Vision Processing IPs Software Programming Model 7. Protocol Converter Intel® FPGA IP 8. 1D LUT Intel® FPGA IP 9. 3D LUT Intel® FPGA IP 10. Adaptive Noise Reduction Intel® FPGA IP 11. Advanced Test Pattern Generator Intel® FPGA IP 12. AXI-Stream Broadcaster Intel® FPGA IP 13. Bits per Color Sample Adapter Intel FPGA IP 14. Black Level Correction Intel® FPGA IP 15. Black Level Statistics Intel® FPGA IP 16. Chroma Key Intel® FPGA IP 17. Chroma Resampler Intel® FPGA IP 18. Clipper Intel® FPGA IP 19. Clocked Video Input Intel® FPGA IP 20. Clocked Video to Full-Raster Converter Intel® FPGA IP 21. Clocked Video Output Intel® FPGA IP 22. Color Plane Manager Intel® FPGA IP 23. Color Space Converter Intel® FPGA IP 24. Defective Pixel Correction Intel® FPGA IP 25. Deinterlacer Intel® FPGA IP 26. Demosaic Intel® FPGA IP 27. FIR Filter Intel® FPGA IP 28. Frame Cleaner Intel® FPGA IP 29. Full-Raster to Clocked Video Converter Intel® FPGA IP 30. Full-Raster to Streaming Converter Intel® FPGA IP 31. Genlock Controller Intel® FPGA IP 32. Generic Crosspoint Intel® FPGA IP 33. Genlock Signal Router Intel® FPGA IP 34. Guard Bands Intel® FPGA IP 35. Histogram Statistics Intel® FPGA IP 36. Interlacer Intel® FPGA IP 37. Mixer Intel® FPGA IP 38. Pixels in Parallel Converter Intel® FPGA IP 39. Scaler Intel® FPGA IP 40. Stream Cleaner Intel® FPGA IP 41. Switch Intel® FPGA IP 42. Tone Mapping Operator Intel® FPGA IP 43. Test Pattern Generator Intel® FPGA IP 44. Unsharp Mask Intel® FPGA IP 45. Video and Vision Monitor Intel FPGA IP 46. Video Frame Buffer Intel® FPGA IP 47. Video Frame Reader Intel FPGA IP 48. Video Frame Writer Intel FPGA IP 49. Video Streaming FIFO Intel® FPGA IP 50. Video Timing Generator Intel® FPGA IP 51. Vignette Correction Intel® FPGA IP 52. Warp Intel® FPGA IP 53. White Balance Correction Intel® FPGA IP 54. White Balance Statistics Intel® FPGA IP 55. Design Security 56. Document Revision History for Video and Vision Processing Suite User Guide

10.3. Adaptive Noise Reduction IP Functional Description

The Adaptive Noise Reduction IP is a spatial weighted averaging filter that analyzes the scene and correlates similar pixels dynamically while simultaneously generating the weights. The IP uses two look-up tables when correlating the pixels, one for correlating pixel intensities, and the other correlating the spatial distance between the pixels.
Figure 19. Adaptive Noise Reduction IP block diagram

You configure the number of vertical and horizontal taps of the filter independently. Configuring a shorter height reduces the number M20K resources for buffering lines while sacrificing denoising strength.

You calibrate the intensity range lookup table offline by the difference between two video frames with identical content but different temporal noise. You isolate the noise level from the difference and calculate the intensity range look-up table entries. This look-up table allows you to program different denoising strengths across the pixel intensities. For example, you may opt for denoising dark content stronger to reduce shadow noise more aggressively while preserving the details on the mid tones and highlights.

The second look-up table is the spatial distance look-up table that makes the IP more versatile. You program this look-up table to create a weight distribution from the center pixel to the neighboring pixels. You may program a traditional distribution like a Hamming or Hanning window to reduce ringing artifacts. You may also prefer assigning the same value to all entries for a rectangular distribution to maximize denoising capability.

The IP supports 2x2 color filter array images where every other pixel belongs to a different color channel. This parameter changes the spatial distance lookup table coefficient locations corresponding to the taps.

Figure 20. Spatial distance LUT entries overlayed on the spatial distance kernel