轉(zhuǎn)載自:http://blog.yikuyiku.com/?p=2280
翻譯自:http://forum.doom9.org/showthread.php?t=160593
譯者按:此文檔時(shí)間為2008。
個(gè)人建議
放大:
重視速度:fast_bilinear, point
重視質(zhì)量:cubic, spline, lanczos
縮小:
重視速度:fast_bilinear, point
重視質(zhì)量:gauss, bilinear
重視銳度:cubic, spline, lanczos
注意:使用定bit(而不是定量化器)編碼時(shí),稍模糊的輸入可能反而比較為銳的輸入在縮放后獲得較好的結(jié)果,尤其在低碼率時(shí)更是如此。
錯(cuò)誤類型
ringing
在銳利的邊緣有塊狀的波或噪點(diǎn)
糟糕的:sinc, lanczos (with high filter length)
可接受:lanczos (with low filter length), cubic, spline
優(yōu)秀的:area, (fast)blinear, gauss, point
blur
細(xì)節(jié)丟失
糟糕的:gauss with high variance
可接受:(fast)bilinear, area
優(yōu)秀的:others
aliasing (only downscale)
梯狀的線條
細(xì)節(jié)豐富的區(qū)域看上去很糟
塊狀區(qū)域顯示錯(cuò)誤
糟糕的:fast bilinear, point, gauss with low variance
可接受:area
優(yōu)秀的:others
blocky (upscale only)
圖像產(chǎn)生了很多塊效應(yīng)
糟糕的:point
優(yōu)秀的:others
sws 編號(hào) / 名稱 / 錯(cuò)誤類型
r ringing
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