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Diffstat (limited to 'DOCS/tech/swscaler_methods.txt')
| -rw-r--r-- | DOCS/tech/swscaler_methods.txt | 64 |
1 files changed, 32 insertions, 32 deletions
diff --git a/DOCS/tech/swscaler_methods.txt b/DOCS/tech/swscaler_methods.txt index b2c7077652..24d2b11835 100644 --- a/DOCS/tech/swscaler_methods.txt +++ b/DOCS/tech/swscaler_methods.txt @@ -2,29 +2,29 @@ artifact types: --------------------------------------------------------------------- ringing - wave or noise like patterns around sharp edges - bad: sinc, lanczos (with high filter length) - acceptable: lanczos (with low filter length), cubic, spline - ok: area, (fast)blinear, gauss, point + wave or noise like patterns around sharp edges + bad: sinc, lanczos (with high filter length) + acceptable: lanczos (with low filter length), cubic, spline + ok: area, (fast)blinear, gauss, point blur - loss of detail / high frequency - bad: gauss with high variance - acceptable: (fast)bilinear, area - ok: others + loss of detail / high frequency + bad: gauss with high variance + acceptable: (fast)bilinear, area + ok: others aliasing (only downscale) - straight lines look like staircases - areas of high detail look worse - regular patterns turn into a funny looking mess (moire patterns) - bad: fast bilinear, point, gauss with low variance - acceptable: area - ok: others + straight lines look like staircases + areas of high detail look worse + regular patterns turn into a funny looking mess (moire patterns) + bad: fast bilinear, point, gauss with low variance + acceptable: area + ok: others blocky (upscale only) - looks like the image is made of rectangular blocks like a mosaic - bad: point - ok: others + looks like the image is made of rectangular blocks like a mosaic + bad: point + ok: others recommendations: (based upon my personal opinion many ppl might disagree ...) --------------------------------------------------------------------- @@ -49,20 +49,20 @@ b blurry a aliasing (downscale only) m mosaic (blocky) (upscale only) --sws 0 fast bilinear bA --sws 1 bilinear b --sws 2 bicubic high sharpness r - low sharpness b --sws 3 experimental ???? --sws 4 nearest neighbour AM --sws 5 area ba --sws 6 luma bicubic / chroma bilinear r --sws 7 gauss low sharpness B - high sharpness AM --sws 8 sinc R --sws 9 lanczos long filter R - short filter b --sws 10 bicubic spline r +-sws 0 fast bilinear bA +-sws 1 bilinear b +-sws 2 bicubic high sharpness r + low sharpness b +-sws 3 experimental ???? +-sws 4 nearest neighbour AM +-sws 5 area ba +-sws 6 luma bicubic / chroma bilinear r +-sws 7 gauss low sharpness B + high sharpness AM +-sws 8 sinc R +-sws 9 lanczos long filter R + short filter b +-sws 10 bicubic spline r Notes: - area upscale is identical to bilinear + area upscale is identical to bilinear |