Jpegsnoop Free Download ((HOT))
Quinten Moye
puzzled, tried a bunch of different programs for cleaning. but one fig in the end jpegsnoop gives an assessment: clas1 - Image is processed / edited but it was necessary to have ASSESSMENT: Class 4 - ...
Bingung, mencoba banyak program berbeda untuk pembersihan. tetapi satu gambar pada akhirnya jpegsnoop memberikan penilaian: clas1 - Gambar diproses / diedit tetapi itu diperlukan agar PENILAIAN: Kelas...
Saying that it is 5 bits per pixel vs 3 bits is basically counting file size instead of understanding the process of jpg compression. I highly recommend the jpegsnoop discussions and the wikipedia jpg article.
You can learn about both the subsampling and the quality value indicated by the quantization tables of various camera brands/models on the jpegsnoop site. Its site navigation is a bit tricky to figure out but the information is pretty well presented.
Canon's P&S cameras pretty much have 2x1 chroma subsampling and quality settings for Fine and Super Fine that are pretty similar throughout the lines. For models that are not listed, or for an interesting peek into your camera's jpg files you can download jpegsnoop.exe and snoop inside to get the actual quantization tables and subsampling data as well as lots of other stuff.
I am starting with an uncompressed raw image that I shot of my little still-life and tweaked slightly in DPP and converted to uncompressed tiff. For the SX50 HS (discovered using jpegsnoop to look at actual images out of the camera) and most of the Canon P&S cameras on the jpegsnoop site approximating the jpeg compression will involve setting the subsampling to 4:2:2 (2x1) and then applying a quality number of 97 for Super Fine and 93 for Fine. (It is less easy to apply different qualities for chrominance and luminances--I'm assuming that the luminance quality is more likely to be what your eye perceives since it is less sensitive to variations in color.)
perplesso, ho provato un sacco di programmi diversi per la pulizia. ma un fico alla fine jpegsnoop dà una valutazione: clas1 - L'immagine viene elaborata / modificata ma era necessaria in modo che fos...