irvinlim / cs3211-project-1 Goto Github PK

Develop a small set of original image processing functions, which run both on a GPU and CPU platform, in a browser. You will be doing this (only) in a subset of Javascript, using V0 GPU.js (the original GPU accelerated Javascript http://gpu.rocks/). In the assessment of your program, marks will be given for range (i.e. how much you completed), and for your use of any specific techniques that you use to improve the behaviour of your program (beyond the obvious one-pixel-per- thread in the demo program given to you). Your code(s) is likely to be no more than 150-1500 commented lines.

• Implementation of filters
  • Gaussian blur
  • Sobel edge detection
  • Thresholding (w/ different modes)
  • Light tunnel effect
• Pipelining of filters
• Parameterization of filters
• Explanation of QR code detection
• Explanation of speedup techniques
  • Omitting alpha channel
  • Using outputToTexture whenever possible
  • Parallelization of rowWise/colWise kernels.
  • Disabling of QR code output by default due to expensive GPU-CPU copying
• Accuracy improvements
  • Reduce false positives
• Benchmarking of GPU vs CPU
  • Using Chrome profiler
  • Against different input sizes
• Problems faced?
  • No bitwise operations in WebGL 1.0
  • Math.atan2 does not exist in WebGL 1.0

Write up laboratories 1 and 2 in a short-essay style. You will explain the results you got with respect to the hardware, the speedup, and accuracy results you achieved. This write-up should take no more than (say) 5 pages.

• Lab 1
  • Task 1
  • Task 2
  • Task 3
  • Task 4
  • Task 6
  • Task 8
• Lab 2
  • Task 1
  • Task 2
  • Task 3
  • Task 4
  • Task 5
  • Task 6
  • Task 7

Investigate the low framerate issue with the demo application provided, even when no processing is happening. Identify which code or functions are taking up time, showing how you established it (screenshots/data/graphs). If you can, fix it, again explaining how you fixed it.

• Explanation and graphs
• Fixed code

Issue with the Math.atan function in GLSL.

Fallback to other trigonometry methods if possible.