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JerryLee 發表於 2006-10-4 01:32 PM

下載時選擇點陣圖影像同JPEG影像質素方面有無分別?

JPEG(*.jpg)

點陣圖(*.bmp)

響網上下載圖片時會有JPEG(*.jpg)同點陣圖(*.bmp)兩者選擇

點陣圖影像檔案大小 除了比 JPEG影像檔案大小 大好多之外

質素方面有無分別?

希望各位高手可以幫幫我

唔該

[[i] Last edited by JerryLee on 2006-10-4 at 01:35 PM [/i]]

d228216 發表於 2006-10-4 01:53 PM

bmp - Windows bitmap, 點對點冇壓縮.  睇到乜就save乜, 100%冇失真, 但容量非常大.
jpeg[蕳稱 jpg] - Joint Photographic Experts Group, 有壓縮, 容量小, 壓縮率可調整令容量更細, 失真率小於1%起.
詳見: [url]http://www.jpeg.org/committee.html[/url]

[[i] Last edited by d228216 on 2006-10-4 at 01:56 PM [/i]]

yukason 發表於 2006-12-5 10:22 AM

oh, i originally think jpeg is the best between quality and size

hold_find 發表於 2006-12-5 11:36 AM

其實如果放上網的是jpeg,再下載jpeg會不會進一步壓縮?
還是只要下jpeg就足夠,再下bmp都只會是jpeg質素(冇進一步壓縮)?

hold_find 發表於 2006-12-5 06:44 PM

同埋我想問,如果我bmp壓jpg時,我選"Image Quality"是100%的話,圖片仍會失真嗎?用png又會有失真嗎?

ylc301403 發表於 2006-12-7 08:37 AM

[quote]Originally posted by [i]d228216[/i] at 2006-10-4 01:53 PM:
bmp - Windows bitmap, 點對點冇壓縮.... [/quote]

Thank for your information
I also want to know any different for print out between BMP & JPG ?

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