!c99Shell v. 1.0 pre-release build #16!

Software: Apache/2.2.3 (CentOS). PHP/5.1.6 

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5.5. 阈值工具

5.5. 阈值工具

阈值工具可以通过像素的亮度值决定活动图层或选区上的像素是否可见。

5.5.1. 启动工具

按如下步骤启动阈值工具,在图像菜单中:工具/颜色工具/阈值

5.5.2. 选项

图 8.45.  Threshold tool options

Threshold tool options
阈值范围

阈值工具提供一个反映活动图层或选区上亮度值的可试化图表。您可以通过输入栏或在图表上拖动左键来设定阈值范围。它允许您从不同亮度的背景中选取部分图像。在范围内的像素都为白色,其它则是黑色。《Grokking the Gimp》中很好地介绍如何从中提取选区。

预览

预览勾选框动态更新在当前图层或选区上对亮度范围的更改。


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--[ c999shell v. 1.0 pre-release build #16 Modded by Shadow & Preddy | RootShell Security Group | r57 c99 shell | Generation time: 0.0117 ]--