e678. 尖锐化图像

This example demonstrates a 3x3 kernel that sharpens an image.

    Kernel kernel = new Kernel(3, 3,
        new float[] {
            -1, -1, -1,
            -1, 9, -1,
            -1, -1, -1});
    BufferedImageOp op = new ConvolveOp(kernel);
    bufferedImage = op.filter(bufferedImage, null);

e678. 尖锐化图像

原文：https://www.cnblogs.com/borter/p/9575568.html