Java opencv 疊加圖片，添加logo圖

轉自爛代碼網: Java opencv 疊加圖片，添加logo圖

https://trashcode.cn/post/d/88c23686-ceb6-4bad-b17e-3cd4640c2cd6

利用Java Opencv包，疊加圖片

比如，有兩張圖片，背景圖，待添加的logo圖

背景圖:

待添加的logo圖:

1.添加Java Opencv的package，在maven中設置

<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>opencv</artifactId>
<version>4.3.0-1.5.3</version>
</dependency>

2.將logo圖添加到背景圖左上角位置，代碼如下：

import static org.bytedeco.opencv.global.opencv_imgcodecs.imread;
import static org.bytedeco.opencv.global.opencv_imgcodecs.imwrite;
import static org.bytedeco.opencv.global.opencv_imgproc.resize;
import static org.bytedeco.opencv.helper.opencv_imgcodecs.cvLoadImage;
import org.bytedeco.opencv.global.opencv_core;
import org.bytedeco.opencv.opencv_core.Mat;
import org.bytedeco.opencv.opencv_core.Rect;
import org.bytedeco.opencv.opencv_core.Size;

public void overlapPhoto() {
//背景圖
String sourceImg = "background.jpg";
//待添加的背景圖logo
String addImg ="logo.jpg";
//疊加以后的圖片文件名
String mixImgPath="overlayPhoto.jpg";
try {
//讀取背景圖
Mat srcImageMat = imread(sourceImg);
//讀取logo圖片
Mat addImgMat = imread(addImg);
//獲取logo的寬
int addImgMatcols = addImgMat.cols();
//獲取logo的高
int addImgMatrows = addImgMat.rows();
//logger 輸出信息
LOGGER.info("addimg cols:{},rows:{},size:{}", addImgMatcols, addImgMatrows, addImgMat.size());

//設置mask
Mat mask = imread(addImg,0);

//設置在背景圖上需要疊加的區域，如下，x,y為10開始，長寬分別為logo的長寬
//設置的長寬比如滿足x+logo.width<=src.width,y+logo.height<=src.width...
//否則 throw exception
Mat srcRoi = new Mat(srcImageMat, new Rect(10, 10, addImgMat.cols(), addImgMat.rows()));
LOGGER.info("srcRoi cols:{},rows:{}", srcRoi.cols(), srcRoi.rows());
addImgMat.copyTo(srcRoi, mask);
//寫入圖片進行疊加
imwrite(mixImgPath, srcImageMat);
LOGGER.info(mixImgPath);
LOGGER.info("Overlap completed!");
} catch (Exception e) {
LOGGER.error("", e);
}
}

結果如下：

*若無logger設置，將實例中logger替換為System.out.println 即可