OpenCV按照权重叠加合成图片

Myth丶恋晨 2023-06-24 01:30 11阅读 0赞

现在有两张图片，一张是大象图src.jpg：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3BoaWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70][]

另外一张是热点图heat.jpg：

![20191220124123327.jpg][]

要求把热点热力图叠加到大象图上：

import cv2 as cv
    
    if __name__ == '__main__':
        img1 = cv.imread('src.jpg')
        img2 = cv.imread('heat.jpg')
    
        # 热图变成和原图大小相同
        heatmap = cv.resize(src=img2, dsize=(img1.shape[1], img1.shape[0]))
    
        # 把热图处理成CV中的密度热力图样式
        heatmap = cv.applyColorMap(heatmap, cv.COLORMAP_JET)
    
        # 叠加
        # src1不透明。src2透明度0.9
        img_add = cv.addWeighted(src1=img1, alpha=1, src2=heatmap, beta=0.9, gamma=0)
    
        # 显示图
        cv.imshow('frame', img_add)
        cv.waitKey(0)
    
        # 保存图
        save_path = 'heatmap2.jpg'
        cv.imwrite(save_path, img_add)

最终合成新的图片：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3BoaWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3BoaWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191220124053439.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly96aGFuZ3BoaWwuYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70
[20191220124123327.jpg]: https://img-blog.csdnimg.cn/20191220124123327.jpg
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96aGFuZ3BoaWwuYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191220124149707.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly96aGFuZ3BoaWwuYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70