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Photoshop Save For Web
The Save For Web dialog box doesn't provide as much flexibility in the ouput image file formats as the Save As dialog, but it does offer more flexibility with each supported option. Supported output file formats include:
- JPEG - Selection of Quality level (1-100). No transparency.
- GIF - Different palette sizes (2-256) and dithering options define quality. Supports single-bit transparency.
- PNG-8 - Reduced color depth (2-256 colors) and dithering options defines quality. Supports multi-bit transparency.
- PNG-24 - "Lossless" 24-bit quality. Supports multi-bit transparency.
- WBMP - Black & White dithered output.
（附圖見下面的中文版）
Main window for Save for Web
The focus on this page will be on the JPEG output format.
Photoshop另存為網(wǎng)頁格式
另存為網(wǎng)頁格式?jīng)]有像另存為那樣提供很多中保存圖像文件的格式選擇，但是它為每種支持的格式提供了更靈活的設(shè)置。支持的格式包括：
- Jpeg－可以設(shè)置圖像保存質(zhì)量（1－100％）。無透明度。
- Gif－通過設(shè)置調(diào)色盤大�。�2－256色）和顏色抖動(dòng)來確定保存圖片的質(zhì)量。支持單色透明度。
- Png-8－通過設(shè)置調(diào)色盤大�。�2－256色）和顏色抖動(dòng)來確定保存圖片的質(zhì)量。支持單色透明度。（原文中png-8透明度的說法貌似有誤？）
- Png－24－無損24位質(zhì)量。支持透明度。
- Wbmp－黑白抖動(dòng)輸出。
另存為網(wǎng)頁格式的主窗口
按上圖中的設(shè)置將輸出jpeg格式文件。
Save For Web JPEG output
Because the Save for Web command is intended to be used for images that are destined for display on the internet, one of the primary goals is in optimizing the file size as much as possible while still retaining acceptable image quality. To this end, two methods are used to achieve this: a) a live preview of changing JPEG compression quality sliders and b) the removal of all unnecessary metadata (JPEG markers) in the output file.
The main features in Save for Web include:
- Optimize to File Size: Ability to automatically select both the file format (JPEG or GIF) and JPEG compression level to achieve the selected file size.
- Removal of EXIF metadata. For many this is a useful feature, while others will completely avoid Save for Web because of it. For simple images on a web site or for privacy reasons, you may want to hide the time/date a photo was taken, or other parameters. But, if you plan to share your images on a photo hosting site and would like to indicate the focal length, aperture and other parameters to your viewers, Save for Web will not be the right method.
- Removal of Optional Markers. In most output JPEG files, special markers are used to indicate additional information or provide resiliency in the case of errors / corruption. The Save for Web method will remove these and still allow JPEG decoders to work.
另存為網(wǎng)頁格式之jpeg輸出
保存為網(wǎng)頁格式目的是輸出展示在網(wǎng)頁上的圖片，保存的主要的目的之一是在維持圖片質(zhì)量的同時(shí)盡可能地縮小文件體積。保存為網(wǎng)頁格式使用了兩種方法達(dá)到此目的：a) 在拖動(dòng)滑動(dòng)條更改jpeg質(zhì)量設(shè)置時(shí)提供即時(shí)預(yù)覽；b）移除輸出文件中所有不必要的信息（jpeg標(biāo)記）。
另存為網(wǎng)頁格式的主要特色有：
- 優(yōu)化文件大�。嚎梢宰詣�(dòng)選擇文件格式（jpeg或gif）和選擇jpeg的壓縮率，以實(shí)現(xiàn)選定的文件大小。
- 移除Exif信息。很多時(shí)候這是一個(gè)有用的功能，而另一些人則會(huì)因?yàn)榇斯δ芏皇褂昧泶鏋榫W(wǎng)頁格式。對(duì)于簡(jiǎn)單的網(wǎng)頁圖片來說，或者出于保護(hù)隱私，你也許希望隱藏照片拍攝的時(shí)間日期以及其它參數(shù)。但是，如果你想要在網(wǎng)絡(luò)相冊(cè)中分享你的照片，并且希望觀看者看到拍攝的焦距、光圈和其它參數(shù)，那么就不適合使用另存為網(wǎng)頁格式了。
- 移除可選的標(biāo)記。在大多數(shù)jpeg文件中，有一些記錄附加信息、或是在出錯(cuò)/崩潰時(shí)用以恢復(fù)的特殊標(biāo)記。另存為網(wǎng)頁格式會(huì)在jpeg文件依然能被解碼的前提下移除這些標(biāo)記。
出處：藍(lán)色理想
責(zé)任編輯：bluehearts
上一頁 PS中的"另存為"與"另存為網(wǎng)頁格式" [1] 下一頁 PS中的"另存為"與"另存為網(wǎng)頁格式" [3]
◎進(jìn)入論壇Photoshop、Fireworks版塊參加討論，我還想發(fā)表評(píng)論。
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第 1 頁 
第 2 頁 PS中的"另存為"與"另存為網(wǎng)頁格式" [2]
