Changing brightness and contrast in Java

Drawer Code 128 Code Set B in Java Changing brightness and contrast

Changing a graphic s brightness makes the graphic appear lighter or darker Changing a graphic s contrast makes the graphic s individual pixels either stand out more or become more muted Usually, setting a graphic s contrast goes hand in hand with changing the graphic s brightness So, for example, the brighter a graphic becomes, the more contrast you need to avoid it becoming washed out To change an image s brightness and contrast, follow these steps:

1 In the Page view, click the image that you want to modify 2 Click any of the following four Contrast or Brightness options on the

Pictures toolbar: More Contrast: This option increases the color distinctions between pixels Less Contrast: This option makes the colors blend together More Brightness: This option washes out the image Less Brightness: This option darkens the image Every time that you click a button, the brightness or contrast either increases or decreases incrementally The more times that you click the brightness button, for example, the brighter the image gets

You can undo your work by pressing Ctrl+Z or clicking the Undo button on the Standard toolbar In fact, FrontPage supports multiple undos, so if you re fiddling with an image and you want to return it to its previous condition, open the Undo button drop-down list and choose how many actions you want to undo (To restore an undone action, press Ctrl+Y or click the Restore button)

GIF images support transparency, which means that you can choose to make a particular color on your image invisible This feature is helpful if you have a square graphic and you want to display only the logo in the middle of the image In FrontPage, setting the transparent color is a cinch! Here s what you do:

2 Click the Set Transparent Color button on the Pictures toolbar 3 Click the color on the image that you want to make transparent

All instances of that color in the image become invisible, and you can see the Web page background through it Only GIF images can be made transparent, but all is not lost if you re using other image types in your Web page a JPEG image, for example because FrontPage turns images into GIF files after you click the Set Transparent Color button on the Pictures toolbar In addition, you can set only one transparent color by using this tool If you select the tool again and click another color, that color becomes the transparent color, and the preceding transparent color is no longer transparent

Beveling adds both a border and three-dimensional depth to a graphic The most frequent reason to bevel an image is to create a button effect To bevel an image in FrontPage, follow these steps:

1 In Page view, click the image that you want to bevel 2 Click the Bevel button on the Pictures toolbar

A bevel appears on the graphic, as shown in Figure 7-2

3 If you want to make the bevel darker and add more emphasis to it,

click the Bevel button again Click the Undo button on the Standard toolbar if you regret clicking the Bevel button too many times (Click the Restore button to restore undone actions)

Cropping reduces an image in size by lopping off portions of an image Cropping images comes in handy if, for example, you have a picture of you and your mother-in-law and you want to eliminate your mother-in-law from the picture To be honest, the FrontPage cropping features are limited in that you can crop only rectangular areas To crop an image, follow these steps: