本文整理汇总了Java中org.opencv.core.MatOfPoint2f.fromList方法的典型用法代码示例。如果您正苦于以下问题:Java MatOfPoint2f.fromList方法的具体用法?Java MatOfPoint2f.fromList怎么用?Java MatOfPoint2f.fromList使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.opencv.core.MatOfPoint2f
的用法示例。
在下文中一共展示了MatOfPoint2f.fromList方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: detectContoursByShape
import org.opencv.core.MatOfPoint2f; //导入方法依赖的package包/类
/**
* Filters contours by shape. Iterates through the list of contours and approximates their shape.
* Compares the vertices of the shape to the desired vertices and removes the contour if they do not match.
*
* @param contours list of contours
* @param vertices vertices of the desired shape
* @param accuracy the accuracy of approximation
* @see Imgproc#approxPolyDP(MatOfPoint2f, MatOfPoint2f, double, boolean)
*/
public static void detectContoursByShape(List<MatOfPoint> contours, int vertices, double accuracy){
MatOfPoint2f matOfPoint2f = new MatOfPoint2f();
MatOfPoint2f approxCurve = new MatOfPoint2f();
for(int idx = contours.size() - 1; idx >= 0; idx--){
MatOfPoint contour = contours.get(idx);
matOfPoint2f.fromList(contour.toList());
Imgproc.approxPolyDP(matOfPoint2f, approxCurve, Imgproc.arcLength(matOfPoint2f, true) * accuracy, true);
long total = approxCurve.total();
if (total != vertices)
contours.remove(idx);
}
}
示例2: drawObjectLocation
import org.opencv.core.MatOfPoint2f; //导入方法依赖的package包/类
/**
* Draw the object's location
*
* @param output Image to draw on
* @param objectAnalysis Object analysis information
* @param sceneAnalysis Scene analysis information
*/
public static void drawObjectLocation(Mat output, ObjectAnalysis objectAnalysis, SceneAnalysis sceneAnalysis) {
List<Point> ptsObject = new ArrayList<>();
List<Point> ptsScene = new ArrayList<>();
KeyPoint[] keypointsObject = objectAnalysis.keypoints.toArray();
KeyPoint[] keypointsScene = sceneAnalysis.keypoints.toArray();
DMatch[] matches = sceneAnalysis.matches.toArray();
for (DMatch matche : matches) {
//Get the keypoints from these matches
ptsObject.add(keypointsObject[matche.queryIdx].pt);
ptsScene.add(keypointsScene[matche.trainIdx].pt);
}
MatOfPoint2f matObject = new MatOfPoint2f();
matObject.fromList(ptsObject);
MatOfPoint2f matScene = new MatOfPoint2f();
matScene.fromList(ptsScene);
//Calculate homography of object in scene
Mat homography = Calib3d.findHomography(matObject, matScene, Calib3d.RANSAC, 5.0f);
//Create the unscaled array of corners, representing the object size
Point cornersObject[] = new Point[4];
cornersObject[0] = new Point(0, 0);
cornersObject[1] = new Point(objectAnalysis.object.cols(), 0);
cornersObject[2] = new Point(objectAnalysis.object.cols(), objectAnalysis.object.rows());
cornersObject[3] = new Point(0, objectAnalysis.object.rows());
Point[] cornersSceneTemp = new Point[0];
MatOfPoint2f cornersSceneMatrix = new MatOfPoint2f(cornersSceneTemp);
MatOfPoint2f cornersObjectMatrix = new MatOfPoint2f(cornersObject);
//Transform the object coordinates to the scene coordinates by the homography matrix
Core.perspectiveTransform(cornersObjectMatrix, cornersSceneMatrix, homography);
//Mat transform = Imgproc.getAffineTransform(cornersObjectMatrix, cornersSceneMatrix);
//Draw the lines of the object on the scene
Point[] cornersScene = cornersSceneMatrix.toArray();
final ColorRGBA lineColor = new ColorRGBA("#00ff00");
Drawing.drawLine(output, new Point(cornersScene[0].x + objectAnalysis.object.cols(), cornersScene[0].y),
new Point(cornersScene[1].x + objectAnalysis.object.cols(), cornersScene[1].y), lineColor, 5);
Drawing.drawLine(output, new Point(cornersScene[1].x + objectAnalysis.object.cols(), cornersScene[1].y),
new Point(cornersScene[2].x + objectAnalysis.object.cols(), cornersScene[2].y), lineColor, 5);
Drawing.drawLine(output, new Point(cornersScene[2].x + objectAnalysis.object.cols(), cornersScene[2].y),
new Point(cornersScene[3].x + objectAnalysis.object.cols(), cornersScene[3].y), lineColor, 5);
Drawing.drawLine(output, new Point(cornersScene[3].x + objectAnalysis.object.cols(), cornersScene[3].y),
new Point(cornersScene[0].x + objectAnalysis.object.cols(), cornersScene[0].y), lineColor, 5);
}