有对图象处理熟悉的吗？

[rypan]

现有一gif图片，要求缩小尺寸，保存成4阶灰色png格式。应该如何做？请给个思路。能写出例程的再加100分。

[wqhhust]

You can try to use JAI package(Java Adavanced Image).resize a picture is easy:use scale() function of affinetransform.
AffineTransform af=new AffineTransform();
af.scale(0.5,0.5);
Save it as png,you should use JAI.create("filesave",....);