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David Michael Barr authored
Stop if less than half of the iterations give improvement. Minor metric changes for a 2.5x speed up of the alpha search. Results on subset1: PSNR | PSNR Cb | PSNR Cr | PSNR HVS | SSIM | MS SSIM | CIEDE 2000 -0.0038 | 0.0466 | 0.1388 | -0.0103 | -0.0312 | -0.0220 | 0.0330 Change-Id: Ic25a995eee500ffc4b80b73635baf0a710954dc0
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