Zachary Wassall runer112
HybridDog
/ ssim_perceptual_downscaling.c
Last active
June 26, 2024 18:29
SSIM-based perceptual image downscaling for PNG images
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| // SPDX-License-Identifier: MIT | |
| // | |
| // This program contains an implementation of SSIM-based perceptual image | |
| // downscaling for PNG images. | |
| // The program can be twice as fast when compiled with -Ofast. | |
| // The program behaviour can be adjusted with predefined preprocessor macros: | |
| // * -DTILEABLE: Assume images wrap around at corners. This should be enabled | |
| // when downscaling tileable textures. | |
| // * -DGAMMA_INCORRECT: Downscale without applying the sRGB EOTF and OETF. | |
| // When downscaling images with symbolic meaning, e.g. screenshots of text or |