[tleung11]

我記得有人問過, 不過已經搵唔到啦, 唔好意思, 一係唔該話我知邊度有講..

我其實只係想問晒相係用 200 定 300 dpi?
同埋 3R 係幾大(幾寸乘幾寸)? 4R 又幾大... 等等
呢 D 尺寸又係幾樣得出黎既呢?

[Griffin2000]

Tleung11,

Photo Size Min Image Size Min Resolution (pixel)
2R 150-200K 640 x 480
3R 500-550K 1280 x 960
4R 600-650K 1280 x 1024
5R 800-900K 1600 x 1200
8R 1.0-1.2MB 1900 x 1280
12R 1.3-1.5MB 2048 x 1536

The above information come from a photo laboratory. The photo develop device of the photo laboratory should be used the laser to develop the image on the photo paper, the calculation formula is different with the inkjet printer and the other home user's printer.

^_^

P.S. I don't know how to calculate the above figures.

[tleung11]

好似有少少問題?
4R 唔係要 4 百萬像素先夠咩?
如果 4R 1280x1024 就得, 都係 130 萬像素咋窩
重有我記得晒相唔係 4:3...
但實際係幾多真係唔知, 因為咁耐都未試過晒 digital 相

有錯請指教

[Griffin2000]

Tleung11,

It is the minimum requirement only, but the quality should not good. I have tried to develop such "Low" resolution photo (took by handycam), the photo is not have enough detail. Therefore, you should use 2 million mega pixel image size for develop the photo in 4R size.

*_*

[tleung11]

請問我可以去邊度搵到有關資料?
自己都搵緊, 但係都唔知 search 咩 keyword 好

[Philippe]

街外晒相係300dpi.

3R
5.5" x 3.5"要1650 x1050

4R
6" x 4"要1800 x 1200

[HWC]

Yes, I agree with Brother Philipe.


The photo shop will use 300 dpi
If you use the minimum resolution, the photo will not be good.

[EGI]

如果用600DPI OR 1200DPI，傚果會如何？技術上可行嗎？

[Griffin2000]

EGI,

If you just develop the photo by inkjet printer or photo laboratory, it is not necessary and meaningless (maximum 300dpi is enough). The high "dpi" image is use for printing (印刷-my occupation) only.

^_^!