Adobe photoshop elements 用户手册

ADOBE PHOTOSHOP ELEMENTS

When the Save GIF dialog box appears, set optimi-
zation options as described in “Optimizing 
images” on page 230. If necessary, select Animate. 
Then set the animation options as described 
in“Creating animated GIFs” on page 239. 

Click OK to save the file.

Joint Photographic Experts Group (JPEG) format 
is commonly used to save photographs and other 
continuous-tone images. JPEG format retains all 
color information in an image but compresses file 
size by selectively discarding data. You can choose 
what level of compression you want when you save 
a JPEG file. A higher level of compression results in 
lower image quality and a smaller file size; a lower 
level of compression results in better image quality 
and a larger file size. In most cases, the Maximum 
quality option produces a result indistinguishable 
from the original.

JPEG is one of the standard formats for displaying 
images over the World Wide Web and other online 
services. You can save an image as a JPEG file. (See 
“Optimizing images” on page 230.)

Choose File > Save As, and choose JPEG from 

the format list.

Specify a filename and location, select saving 

options (as described in “Saving images” on 
page 246), and click Save, which opens the JPEG 
Options dialog box.

If the image contains transparency, select a 

Matte color to simulate the appearance of 
background transparency. (See “Making trans-
parent and matted images” on page 233.)

Do one of the following to specify the 

image quality:

Choose an option from the Quality menu.

Drag the Quality pop-up slider.

Enter a value between 1 and 12 in the Quality 

text box.

Select a format option:

Baseline (“Standard”) to use a format that is 

recognizable to most Web browsers. 

Baseline Optimized to optimize the color quality 

of the image and produce a slightly smaller file 
size. This option is not supported by all Web 
browsers. 

Progressive to create an image that displays 

gradually as it is downloaded to a Web browser—
in a series of scans (you specify how many) 
showing increasingly detailed versions of the 
entire image. Progressive JPEG images files are 
slightly larger in size, require more RAM for 
viewing, and are not supported by all applications 
and Web browsers.

To view the estimated download time of the 

image, select a modem speed from the Size pop-up 
menu. (The Size preview is only available when 
Preview is selected.)

Click OK.