[phikin]

想請教下各位關於CROP相問題,我發覺一張相原本係10M,CROP相之後會變左幾百KB,咁有無問題呢?咁對張相的畫質有咩影響?
THANKS FOR REPLY!

[Ciwhy]

有。

[Gorgeous]

你用乜野格式同program?

[yung2]

一塊餅，你只係cut走部分，重量當然會輕咗，但品質係無影響。

不過亦不可cut淨好細塊，否則唔夠食用（像素過低）。

如果你壓細佢就會有影響，越壓得勁就越差~

[phikin]

THANKS FOR REPLY~~
格式係JPEG, PROGRAM 就貪方便用 WINDOWS XP 入面既 WINDOWS PHOTO GALLERY

[phikin]

Thanks Fung2
我用 WINDOW PHOTO GALLARY , 一張相無論CROP 左幾多,都會由10MB 變到幾百KB,會唔會係個SOFTWARE自動壓縮左好多?

[yung2]

應該係，留意save時有無個壓縮選擇，通常有12級揀，唔低過10啲相都ok~

[wesleyyau]

JPEG 每次save 都算只係crop... 佢都會重新壓縮...
所以一定會有data loss 影響畫質... 因為JPEG壓縮就係有data loss... 就算set 到最高品質都係...
不過個分別係唔係可察就睇每個人唔同...

[新手之手]

的確係，將jpeg檔copies咗一千幾百次之後，就會明顯睇到相片質素會跌得好勁……

[Gorgeous]

JPEG相你copy幾多次都係果個file, 點會因為copy多左而影響質素？

[Clarence Tsang]

Jpeg file is already compressed for the first time. You can't compress it again even when you re-save it or copy it. As long as you do not downgrade the quality of the file when you re-save it, there will be no negative effect to the picture. It's just a rumour that it will compress again and again.

[Ciwhy]

ching系咪講compact?

[roy05]

Window 果個就算你唔crop相, 只係開完相save as 一樣會令size細左好多, Jpeg 本身是已壓縮, 但window 內建果個既壓縮比就比相機果個大, 因此file會細~

[Ciwhy]

但之後copy & paste 都會細咗？

[phikin]

THANKS ALL
原來真係唔止CROP相個SIZE會變細,改小小野SAVE都會,但個畫質好似無變(肉眼睇唔倒?),咁咪會慳位左?有咩壞影響呢?
另外執相大家會用咩SOFTWARE 呢?