php 读取图片bgr OpenCV读取图像为BGR

OpenCV读取图像为BGR

以下程序演示了如何将彩色图像作为BGR类型图像读取并使用JavaFX窗口显示。 在这里通过将IMREAD_COLOR标志传递给imread()方法以及保存彩色图像路径的String来读取图像。

package ;

import java.awt.image.BufferedImage;

import org.opencv.core.Core;

import org.opencv.core.Mat;

import org.opencv.imgcodecs.Imgcodecs;

import javafx.application.Application;

import javafx.embed.swing.SwingFXUtils;

import javafx.scene.Group;

import javafx.scene.Scene;

import javafx.scene.image.ImageView;

import javafx.scene.image.WritableImage;

import javafx.stage.Stage;

public class ReadingAsColored extends Application {

@Override

public void start(Stage stage) throws Exception {

WritableImage writableImage = loadAndConvert();

// Setting the image view

ImageView imageView = new ImageView(writableImage);

// Setting the position of the image

imageView.setX(10);

imageView.setY(10);

// setting the fit height and width of the image view

imageView.setFitHeight(400);

imageView.setFitWidth(600);

// Setting the preserve ratio of the image view

imageView.setPreserveRatio(true);

// Creating a Group object

Group root = new Group(imageView);

// Creating a scene object

Scene scene = new Scene(root, 600, 400);

// Setting title to the Stage

stage.setTitle("Reading as colored image");

// Adding scene to the stage

stage.setScene(scene);

// Displaying the contents of the stage

stage.show();

}

public WritableImage loadAndConvert() throws Exception {

// Loading the OpenCV core library

System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

String input = "F:/worksp/opencv/images/sample.jpg";

Mat dst = new Mat();

// Reading the image

Mat src = Imgcodecs.imread(input, Imgcodecs.IMREAD_COLOR);

byte[] data1 = new byte[src.rows() * src.cols() * (int) (src.elemSize())];

src.get(0, 0, data1);

// Creating the buffered image

BufferedImage bufImage = new BufferedImage(src.cols(), src.rows(), BufferedImage.TYPE_3BYTE_BGR);

// Setting the data elements to the image

bufImage.getRaster().setDataElements(0, 0, src.cols(), src.rows(), data1);

// Creating a WritableImage

WritableImage writableImage = SwingFXUtils.toFXImage(bufImage, null);

System.out.println("Image read");

return writableImage;

}

public static void main(String args[]) throws Exception {

launch(args);

}

}

假定以下是上述程序中指定的输入图像sample.jpg。

读取图片转为BGR如下所示 -