如何使用 OpenCV 在 Java 中调整图像大小？
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How to resize an image in Java with OpenCV?
提问by midhun0003
After cropping an image how can I resize it?
裁剪图像后如何调整其大小？
Mat croppedimage = cropImage( image, rect );
Mat resizeimage = croppedimage.resize( any dimension ); //need to change this line
采纳答案by berak
回答by Alexander Mckey
Please read manual for c++ method Resizeit's the same to java.
You can choose a type of interpolation. In some cases it's important for a best result.
Mat croppedImage = cropImage(image,rect); Mat resizeImage = new Mat(anyHeight, anyWidth, croppedImage.type()); int interpolation = Imgproc.INTER_CUBIC; Imgproc.resize(croppedImage, resizeImage, resizeImage.size(), 0, 0, interpolation );
请阅读 c++ 方法的手册Resize它与 java 相同。
您可以选择一种插值类型。在某些情况下，获得最佳结果很重要。
Mat croppedImage = cropImage(image,rect); Mat resizeImage = new Mat(anyHeight, anyWidth, croppedImage.type()); int interpolation = Imgproc.INTER_CUBIC; Imgproc.resize(croppedImage, resizeImage, resizeImage.size(), 0, 0, interpolation );
回答by asmmahmud
If you want to scalean image using OpenCV java then do the following:
如果要使用 OpenCV java缩放图像，请执行以下操作：
import static org.opencv.imgproc.Imgproc.*;
import static org.opencv.imgcodecs.Imgcodecs.imread;
Main code:
主要代码：
Mat src = imread("imageName.jpg");
Mat resizeimage = new Mat();
Size scaleSize = new Size(300,200);
resize(src, resizeimage, scaleSize , 0, 0, INTER_AREA);
For downscaling it is recommended to use: INTER_AREA and for upscaling use INTER_CUBIC
对于缩小，建议使用：INTER_AREA，对于放大使用 INTER_CUBIC
For more details: OpenCV Ref for Resize
有关更多详细信息：用于调整大小的 OpenCV 参考
