demosaicing artifact : 無料・フリー素材/写真
demosaicing artifact / theilr
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
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| 説明 | Virtually all digital cameras use some kind of filter array that puts different color filters on different pixels. The job of the demosaicing algorithm is to assign a color and intensity to every pixel. This invariably involves some kind of guessing, and sometimes the algorithms guess wrong.And it can get the intensity as well as the color wrong, as these BW images illustrate.UL: Nikon's ViewNX 1.5.0UR: Bibble Pro 4.10.1LL: Bibble Pro with "Demosaicing Artifact reduction" turned onLR: RGB composite of these three imagesThese four panels are all from the same 125x125 chip of the same raw Nikon D50 image. The difference is the software used to convert them to jpeg. NOTE: These are not jpeg artifacts, I see the same effect when saving to tiff. Though the images are 125x125, I've upsampled them to 500x500 to make the artifact easier to see. (Final comment: even though ViewNX is clearly superior to Bibble in this test, I still prefer to use Bibble, because it runs on Linux, it has more options, and it's easier to use.) |
| 撮影日 | 2009-10-25 08:17:12 |
| 撮影者 | theilr |
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