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Photoshop 图片处理基础
Photoshop图片处理基础
•   Photoshop基本工具介绍
•   常见图片格式及其使用
•   图片的简单调整
•   图片的剪切
•   图片的缩小
•   图片的输出
•   如何做Screenshot
•   图层的简单运用
Photoshop界面
常见图片格式及其使用
• JPG: 用于颜色较多的图片,如照片(人像,
  风景)
• GIF:颜色较少的图片,支持动画,如
  Screenshot,GIF动画
• PNG:带有透明效果的图片,用于网页制作
• BMP:位图,我们一般不用。
图片的简单调整
• 调整曲线:可使照片变量变暗,增加减少
  对比度等。
• 调整色相饱和度。可修正照片颜色。
图片剪切
图片的缩小
• 为什么要缩小图片?

图片太大会浪费资源,浪费时间,适合的
图片可增加工作效率,减少服务器资源消
耗,减少网络带宽消耗,可使网页显示速
度更快。
图片的输出
• 选择合适的格式:JPG?GIF?PNG?
• 选择合适的参数
• 选择合适的文件大小

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