![](/img/trans.png)
[英]Is there a way of storing Opencv/javacv Mat objects in a database?
[英]OpenCV Mat to JavaCV Mat conversion
在https://github.com/bytedeco/javacpp/issues/38#issuecomment-140728812中记录了一种更简单、更有效的方法,简而言之:
到 JavaCPP/JavaCV:
Mat mat2 = new Mat((Pointer)null) { { address = mat.getNativeObjAddr(); } };
OpenCV的官方Java API:
Mat mat = new Mat(mat2.address());
编辑: OpenCVFrameConverter现在提供了一种更简单、更安全的方法来执行此操作,例如:
OpenCVFrameConverter.ToMat converter1 = new OpenCVFrameConverter.ToMat();
OpenCVFrameConverter.ToOrgOpenCvCoreMat converter2 = new OpenCVFrameConverter.ToOrgOpenCvCoreMat();
Mat mat = ...;
org.opencv.core.Mat cvmat = converter2.convert(converter1.convert(mat));
Mat mat2 = converter2.convert(converter1.convert(cvmat));
您可以使用 java.awt.image.BufferedImage 作为接口。
只需将您的org.opencv.core.Mat对象转换为java.awt.image.BufferedImage ,然后将结果对象转换为org.bytedeco.javacpp.opencv_core.Mat 。
现在,这些是您需要的功能:
1) 将 org.opencv.core.Mat 转换为 java.awt.image.BufferedImage:
public BufferedImage matToBufferedImage(Mat frame) {
int type = 0;
if (frame.channels() == 1) {
type = BufferedImage.TYPE_BYTE_GRAY;
} else if (frame.channels() == 3) {
type = BufferedImage.TYPE_3BYTE_BGR;
}
BufferedImage image = new BufferedImage(frame.width() ,frame.height(), type);
WritableRaster raster = image.getRaster();
DataBufferByte dataBuffer = (DataBufferByte) raster.getDataBuffer();
byte[] data = dataBuffer.getData();
frame.get(0, 0, data);
return image;
}
2) 将 java.awt.image.BufferedImage 转换为 org.bytedeco.javacpp.opencv_core.Mat:
public Mat bufferedImageToMat(BufferedImage bi) {
OpenCVFrameConverter.ToMat cv = new OpenCVFrameConverter.ToMat();
return cv.convertToMat(new Java2DFrameConverter().convert(bi));
}
确保拥有所有必要的罐子和进口。
您可以更深入地研究 JNI 的内容,但对于测试用例,这应该足够了。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.