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

44.3. Unsharp Mask IP Functional Description

The IP creates an unsharp mask by first calculating an approximation to the input image luminance using the input luminance equation:

Equation 11. Input Luminance

The IP then performs a low-pass Gaussian blur (low-pass filter) of .

The IP subtracts this filtered luminance from the original luminance to get the high-frequency components of the luminance.

The IP multiplies this value by the strength to obtain the sharpened luminance. The following equation shows this process.

Equation 12. Sharpened LuminanceThe equation shows that a strength of 0 gives Luma OUT equal to Luma IN .

The IP creates the final output image by calculating a ratio of , which scales the RGB components of the original image. A strength of 0 results in unity ratio.

Equation 13. Final Output Image RGB Scaling

The unsharp mask has an Avalon® memory-mapped agent interface to allow run-time control of the strength of the unsharp mask operation. Set the strength to zero for the IP to pass through the video unchanged.

You need not start the IP via the run-time interface as it starts processing video on its input as soon as it comes out of reset

Changes to the strength run-time control register take effect on the next video line.

Register Behavior

Write values to the control and debugging registers to set video field dimensions. Turn on Debug Features in the GUI so you can read back these values.

Latency

The IP latency under ideal conditions is three video lines plus an additional 34 clock cycles. This latency increases if the streaming video output experiences backpressure via its axi4s_vid_out_tready input. Backpressure increases the latency by the same amount of cycles.

The sharpening strength register setting does not change the latency.