剪出文字形状的图片 [英] Cut out image in shape of text

问题描述

我需要以另一张图像中的文字形状剪下一张图像.我认为最好用图片展示.

I need to cut out an image in the shape of the text in another image. I think it's best shown in images.

这是一张猫的照片:

这是我想剪掉的文字:

生成的图像是这样的:

文本图像将始终是带有透明背景的黑色，并且生成的剪切图也应具有透明背景.两个输入图像的大小也相同.

The text image will always be black with a transparent background, and the resulting cut-out should too have a transparent background. Both input images will also be the same size.

推荐答案

创建一个新的 BufferedImage 并遍历单词 cat 的所有像素，如果它们是黑色的，则将 cat-image 像素复制到新图像中.

Create a new BufferedImage and iterate over all the pixels of word cat and if they are black, copy the cat-image pixels to the new image.

这是一些代码:(最终工作代码，支持抗锯齿)

public static BufferedImage textEffect(BufferedImage image, BufferedImage text) {
    if (image.getWidth() != text.getWidth() ||
        image.getHeight() != text.getHeight())
    {
        throw new IllegalArgumentException("Dimensions are not the same!");
    }
    BufferedImage img = new BufferedImage(image.getWidth(),
                                          image.getHeight(),
                                          BufferedImage.TYPE_INT_ARGB_PRE);

    for (int y = 0; y < image.getHeight(); ++y) {
        for (int x = 0; x < image.getWidth(); ++x) {
           int textPixel = text.getRGB(x, y);
           int textAlpha = (textPixel & 0xFF000000);
           int sourceRGB = image.getRGB(x, y);
           int newAlpha = (int) (((textAlpha >> 24) * (sourceRGB >> 24)) / 255d);
           int imgPixel = (newAlpha << 24) |  (sourceRGB & 0x00FFFFFF);
           int rgb = imgPixel | textAlpha;
           img.setRGB(x, y, rgb);

        }
    }
    return img;
}

这篇关于剪出文字形状的图片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！