What chroma subsampling rate (e.g., 4:2:0 or 4:2:2) does imwrite use when saving a JPEG image?

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Tyler Bell
Tyler Bell 2016 年 11 月 7 日
コメント済み: Diego Ayala 2022 年 2 月 8 日
What chroma subsampling rate (e.g., 4:2:0 or 4:2:0) does imwrite use when saving a JPEG image, by default?

回答 (1 件)

DGM
DGM 2021 年 4 月 10 日
I know this is an old question, but I just had to figure it out myself. Imwrite uses 4:2:0 chroma subsampling, and the default quality setting is 75%. Somebody must really love crispy jpeg artifacts.
  1 件のコメント
Diego Ayala
Diego Ayala 2022 年 2 月 8 日
Thanks for clarifying this, currently working on a new image compression format and comparing to JPG generated by Matlab, this informmation is useful.

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