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Chapter 19. Extras > Slicing Images into Pieces

Slicing Images into Pieces

In your travels around the Web, you've probably noticed how the top section of many professional-looking sites appear in bits and pieces. There are several good reasons for slicing an image into smaller chunks. By separating out the blocks that appear in multiple places on your site, you can take advantage of the fact that once an image has been viewed on one page, it is viewed much more quickly on the next. Next, if you divide the computer-generated sections of the image with lots of the same color from the photographic elements, the former can be compressed more efficiently with GIF while the latter will take up less space when saved as JPEG. Finally, you can designate particular pieces of the image to hold frequently updated material. That way you don't have to change the entire image every time you want to add something to it.

Many image editing programs have special slicing features that automate both the division of the image and the creation of the table afterwards. If you don't have such a program, you can use these steps outlined below.


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