引用:
JPEG 2000 requires far greater decompression time than JPEG and allows more sophisticated progressive downloads, yet averages similar compression rates. JPEG 2000 becomes increasingly blurred with higher compression ratios rather than generating JPEG's "blocking and ringing" artifacts, complicating direct comparison of their respective compression rates.
貌似jpeg2k还不如jpg么...没看到哪儿有说是无损的啊...
引用:
The TIFF offers the option of using LZW compression, a lossless data compression technique for reducing a file's size.
还是tiff好～
引用:
试验一：某小型BMP图，大小564K，IV软件转换JPG100，转换后大小64K（竟然下去了500K，汗）再次转换为BMP，大小642K，差的不多。不过还是损失了22K，肉眼未见噪点。
第一段不是结论有错就是数据有错^3^
话说lz用的图太小啦，
偶用了6000+x8000+的图才稍微看出一点300dpi,350dpi和600dpi的区别...OTL...
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本帖最后由 Drache 于 2008-7-6 04:57 编辑 ]
