Java图像的裁剪，缩放

//图像的裁剪,缩放

CropImageFilter filter=new CropImageFilter(x,y,w,h);

ReplicateScaleFilter filter=new ReplicateScaleFilter(w/2,h/2);

AreaAveragingScaleFilter filter=new AreaAveragingScaleFilter(w/2,h/2);

FilteredImageSource fis=new FilteredImageSource(im.getSource(),filter);

im_des=createImage(fis);