Core.flip
Imgproc.remap
Imgproc.warpAffine
图片镜像翻转、以图片中心为原点旋转、垂直及水平拉伸。
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import java.awt.Color; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.image.BufferedImage; import javax.swing.ButtonGroup; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JRadioButton; import javax.swing.JSlider; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; import org.opencv.core.Core; import org.opencv.core.CvType; import org.opencv.core.Mat; import org.opencv.core.MatOfPoint2f; import org.opencv.core.Point; import org.opencv.imgcodecs.Imgcodecs; import org.opencv.imgproc.Imgproc; /** * 图片翻转、旋转、拉伸 */ public class Rotate extends JFrame { private JLabel imageView; private double leftTopX = 0; private double leftTopY = 0; private double rightTopX = 1; private double rightTopY = 0; private double leftBottomX = 0; private double leftBottomY = 1; private Mat srcMat; public Rotate(String img) { JLabel resizeLabel = new JLabel("镜像："); resizeLabel.setBounds(15, 10, 40, 25); resizeLabel.setForeground(Color.BLUE); JRadioButton resetBtn = new JRadioButton("复位"); resetBtn.setBounds(80, 10, 65, 25); resetBtn.setForeground(Color.BLUE); resetBtn.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { setIcon(srcMat); } }); JRadioButton updownBtn = new JRadioButton("上下"); updownBtn.setBounds(150, 10, 65, 25); updownBtn.setForeground(Color.BLUE); updownBtn.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { remapPic(1); } }); JRadioButton leftrightBtn = new JRadioButton("左右"); leftrightBtn.setBounds(215, 10, 65, 25); leftrightBtn.setForeground(Color.BLUE); leftrightBtn.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { remapPic(2); } }); JRadioButton updownleftrightBtn = new JRadioButton("上下左右"); updownleftrightBtn.setBounds(285, 10, 130, 25); updownleftrightBtn.setForeground(Color.BLUE); updownleftrightBtn.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { remapPic(3); } }); ButtonGroup group = new ButtonGroup(); group.add(resetBtn); group.add(updownBtn); group.add(leftrightBtn); group.add(updownleftrightBtn); JLabel angleLabel = new JLabel("角度:" + 0); angleLabel.setBounds(15, 50, 60, 25); angleLabel.setForeground(Color.GREEN); JSlider angleBar = new JSlider(0, 360); angleBar.setValue(0); angleBar.setBounds(80, 50, 220, 25); angleBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { int value = angleBar.getValue(); angleLabel.setText("角度:" + value); anglePic(value); } }); JLabel leftTopXLabel = new JLabel("左上X:" + 0); leftTopXLabel.setBounds(15, 90, 65, 25); JSlider leftTopXBar = new JSlider(0, 10); leftTopXBar.setValue(0); leftTopXBar.setBounds(70, 90, 100, 25); leftTopXBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { leftTopX = leftTopXBar.getValue() / 10d; leftTopXLabel.setText("左上X:" + leftTopX); wrapPic(); } }); JLabel leftBottomXLabel = new JLabel("左下X:" + 0); leftBottomXLabel.setBounds(205, 90, 65, 25); JSlider leftBottomXBar = new JSlider(0, 10); leftBottomXBar.setValue(0); leftBottomXBar.setBounds(260, 90, 100, 25); leftBottomXBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { leftBottomX = leftBottomXBar.getValue() / 10d; leftBottomXLabel.setText("左下X:" + leftBottomX); wrapPic(); } }); JLabel rightTopXLabel = new JLabel("右上X:" + 0); rightTopXLabel.setBounds(400, 90, 65, 25); JSlider rightTopXBar = new JSlider(0, 10); rightTopXBar.setValue(10); rightTopXBar.setBounds(460, 90, 100, 25); rightTopXBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { rightTopX = rightTopXBar.getValue() / 10d; rightTopXLabel.setText("右上X:" + rightTopX); wrapPic(); } }); JLabel leftTopYLabel = new JLabel("左上Y:" + 0); leftTopYLabel.setBounds(15, 120, 65, 25); JSlider leftTopYBar = new JSlider(0, 10); leftTopYBar.setValue(0); leftTopYBar.setBounds(70, 120, 100, 25); leftTopYBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { leftTopY = leftTopYBar.getValue() / 10d; leftTopYLabel.setText("左上Y:" + leftTopY); wrapPic(); } }); JLabel leftBottomYLabel = new JLabel("左下Y:" + 0); leftBottomYLabel.setBounds(205, 120, 65, 25); JSlider leftBottomYBar = new JSlider(0, 10); leftBottomYBar.setValue(10); leftBottomYBar.setBounds(260, 120, 100, 25); leftBottomYBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { leftBottomY = leftBottomYBar.getValue() / 10d; leftBottomYLabel.setText("左下Y:" + leftBottomY); wrapPic(); } }); JLabel rightTopYLabel = new JLabel("右上Y:" + 0); rightTopYLabel.setBounds(400, 120, 65, 25); JSlider rightTopYBar = new JSlider(0, 10); rightTopYBar.setValue(0); rightTopYBar.setBounds(460, 120, 100, 25); rightTopYBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { rightTopY = rightTopYBar.getValue() / 10d; rightTopYLabel.setText("右上Y:" + rightTopY); wrapPic(); } }); srcMat = Imgcodecs.imread(img); int width = srcMat.width(); int height = srcMat.height(); imageView = new JLabel(""); imageView.setBounds(40, 150, width, height); this.setTitle("图片翻转、旋转、拉伸"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setSize(width + 100, height + 180); this.getContentPane().setLayout(null); this.getContentPane().add(resizeLabel); this.getContentPane().add(resetBtn); this.getContentPane().add(updownBtn); this.getContentPane().add(leftrightBtn); this.getContentPane().add(updownleftrightBtn); this.getContentPane().add(angleLabel); this.getContentPane().add(angleBar); this.getContentPane().add(leftTopXLabel); this.getContentPane().add(leftTopXBar); this.getContentPane().add(leftBottomXLabel); this.getContentPane().add(leftBottomXBar); this.getContentPane().add(rightTopXLabel); this.getContentPane().add(rightTopXBar); this.getContentPane().add(leftTopYLabel); this.getContentPane().add(leftTopYBar); this.getContentPane().add(leftBottomYLabel); this.getContentPane().add(leftBottomYBar); this.getContentPane().add(rightTopYLabel); this.getContentPane().add(rightTopYBar); this.getContentPane().add(imageView); setIcon(srcMat); } private void remapPic(int direction) { int rows = srcMat.rows(); int cols = srcMat.cols(); int type = srcMat.type(); if (1 == 1) { // 方法1 Mat destMat = new Mat(rows, cols, type); if (1 == direction) { Core.flip(srcMat, destMat, 0); // 垂直镜像 } else if (2 == direction) { Core.flip(srcMat, destMat, 1); // 水平镜像 } else { Core.flip(srcMat, destMat, -1); // 上下左右镜像 } setIcon(destMat); return; } // 方法2 Mat xMat = new Mat(rows, cols, CvType.CV_32FC1); // 可选：CV_16SC2、CV_32FC1、CV_32FC2 。 Mat yMat = new Mat(rows, cols, CvType.CV_32FC1); // 可选：CV_16UC1、CV_32FC1 。 for (int i = 0; i < rows; i++) { // 行 for (int j = 0; j < cols; j++) { // 列 if (1 == direction) { // 上下镜像 // int row, int col, double... data xMat.put(i, j, j); // 行还是原来的行 yMat.put(i, j, rows - i); // 列所在的行进行了翻转 } else if (2 == direction) { // 左右镜像 xMat.put(i, j, cols - j); // 行所在的列进行了翻转 yMat.put(i, j, i); // 列还是原来的列 } else { // 上下左右镜像 xMat.put(i, j, cols - j); yMat.put(i, j, rows - i); } } } Mat destMat = new Mat(rows, cols, type); Imgproc.remap(srcMat, destMat, xMat, yMat, 0); // 重映射。根据xMat和yMat将src拷贝到dest。插值方式Imgproc.INTER_NEAREST-0。 setIcon(destMat); } private void anglePic(int angle) { int rows = srcMat.rows(); int cols = srcMat.cols(); int type = srcMat.type(); int scale = 1; // 缩放值 Mat destMat = new Mat(rows, cols, type); Point center = new Point(cols / 2, rows / 2); Mat matrix = Imgproc.getRotationMatrix2D(center, angle, scale); Imgproc.warpAffine(srcMat, destMat, matrix, destMat.size()); setIcon(destMat); } private void wrapPic() { int cols = srcMat.cols(); int rows = srcMat.rows(); Point[] srcPoints = new Point[3]; srcPoints[0] = new Point(0, 0); // 左上角 srcPoints[1] = new Point(cols - 1, 0); // 右上角 srcPoints[2] = new Point(0, rows - 1); // 左下角 MatOfPoint2f srcTri = new MatOfPoint2f(); srcTri.fromArray(srcPoints); Point[] dstPoints = new Point[3]; dstPoints[0] = new Point(cols * leftTopX, rows * leftTopY); dstPoints[1] = new Point(cols * rightTopX, rows * rightTopY); dstPoints[2] = new Point(cols * leftBottomX, rows * leftBottomY); MatOfPoint2f dstTri = new MatOfPoint2f(); dstTri.fromArray(dstPoints); Mat wrapMat = Imgproc.getAffineTransform(srcTri, dstTri); // 根据输入图像的三点坐标计算输出图形的仿射变换矩阵 Mat dstMat = new Mat(rows, cols, srcMat.type()); Imgproc.warpAffine(srcMat, dstMat, wrapMat, dstMat.size()); // 根据仿射变换矩阵，从src计算得到dst setIcon(dstMat); } private void setIcon(Mat mat) { BufferedImage image = CVUtil.matToBufferedImage(mat); // CVUtil 见 http://www.gaohaiyan.com/3229.html imageView.setIcon(new ImageIcon(image)); } } |
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声明
本文由崔维友 威格灵 cuiweiyou vigiles cuiweiyou 原创，转载请注明出处：http://www.gaohaiyan.com/3285.html
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