Wavelets/notes at master · oshkosher/Wavelets · GitHub

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extract a rectangular region of data file
tail -n +2 squirrel_v2_inv.data  | cut -d ' ' -f 1-1024 | head -1024

Fastvideo
http://www.fastcompression.com/solutions/dwt/cuda-dwt.htm
  .15ms to do a foward/inverse 2D Haar transform (13 GBytes/s)
    13 GB/s in for .15ms = 2093796 bytes
    2093796 bytes as:
      1 byte pixels: 1447x1447
      4 byte pixels: 723x723
      8 byte pixels: 512x512

host -> device data bandwidth: 6.1 GB/sec
  8192x8192 array of floats in 40.6 ms


Best time so far:
Reading collage.data...8192 x 8192
CPU: 3893.958740 ms
Time elapsed creating GPU tasks: 0.450717 ms
Times:
  Copy data to GPU:      40.741 ms
  Transform time:        63.451 ms (2 calls)
  Transpose time:        57.782 ms (2 calls)
  Copy data from GPU:    40.169 ms
CUDA: 202.155518 ms

           Time in ms for different image sizes
BlockSize  256    512    1024   2048    4096    8192
32         0.167  0.551  2.175  10.509  44.392  178.839
64         0.128  0.373  1.425   6.894  28.775  115.359
128        0.112  0.346  1.322   6.354  26.934  110.321
256        0.137  0.365  1.290   5.256  25.154  107.386
512        0.214  0.464  1.369   5.076  20.807  100.070
1024       0.382  0.869  1.977   5.528  20.410  82.583

OpenCV / JavaCV
  Download OpenCV from http://opencv.org/
  Download JavaCV from https://github.com/bytedeco/javacv