Java openCV KNN findNearest错误
我试图实现KNN findNearest函数。我的程序将识别图片中的数字,但如果程序使用findNearest,我会出错。代码如下:Java openCV KNN findNearest错误,java,opencv,ocr,knn,Java,Opencv,Ocr,Knn,我试图实现KNN findNearest函数。我的程序将识别图片中的数字,但如果程序使用findNearest,我会出错。代码如下: `private void searchingData() { img_gray = new Mat(); img_blur = new Mat(); img_thres = new Mat(); Imgproc.cvtColor(img, img_gray, Imgproc.COLOR_BGR2GRAY); Imgpr
`private void searchingData() {
img_gray = new Mat();
img_blur = new Mat();
img_thres = new Mat();
Imgproc.cvtColor(img, img_gray, Imgproc.COLOR_BGR2GRAY);
Imgproc.GaussianBlur(img_gray, img_blur, new Size(5,5), 0);
//Imgproc.adaptiveThreshold(img_blur, img_thres, 255, Imgproc.ADAPTIVE_THRESH_MEAN_C, Imgproc.THRESH_BINARY, 7, 5);
Imgproc.Canny(img_blur, img_thres, 10, 100);
Imgproc.findContours(img_thres, contours, new Mat(), Imgproc.RETR_LIST,Imgproc.CHAIN_APPROX_SIMPLE);
for(int i=0; i< contours.size();i++){
Rect rect = Imgproc.boundingRect(contours.get(i));
if (rect.height < 50 && rect.height > 20){
System.out.println(rect.x +","+rect.y+","+rect.height+","+rect.width);
Mat subImg = new Mat();
Imgproc.resize(img.submat(rect), subImg, new Size(10,10));
//Found numbers then try to recognize it
recognize(subImg);
}
}
}
public void learn() { //get the training data and train the KNN
Mat sample, training_img = new Mat(), res = new Mat();
for (int i = 1; i < 10; i++) {
String path = String.format(".../Documents/numbers/%03d.png", i);
sample = Imgcodecs.imread(path, Imgcodecs.CV_LOAD_IMAGE_GRAYSCALE);
Mat m = new Mat(new Size(1,1), CvType.CV_32FC1);
m.setTo(new Scalar(i));
res.push_back(m);
training_img.push_back(prepareImg(sample));
}
model = KNearest.create();
model.train(training_img, Ml.ROW_SAMPLE, res);
}
private Mat prepareImg(Mat img) { //change image in the right format
Mat sample = new Mat(), sized = new Mat();
Imgproc.resize(img, sized, new Size(10,10));
sized.reshape(1,1).convertTo(sample, CvType.CV_32FC1);
return sample;
}
public void recognize(Mat getImg) {
Mat results = new Mat();
Mat dists = new Mat();
float result = model.findNearest(prepareImg(getImg), 2, results, new Mat(), dists);
//result should be the number in getImg
System.out.println(result);
}`
`private void searchingData(){
img_gray=新垫();
img_blur=新垫();
img_thres=新垫();
Imgproc.cvt颜色(img,img_灰,Imgproc.COLOR_bgr2灰);
高斯模糊(img_灰度,img_模糊,新尺寸(5,5),0);
//Imgproc.adaptiveThreshold(img_blur,img_thres,255,Imgproc.ADAPTIVE_THRESH_MEAN_C,Imgproc.THRESH_BINARY,7,5);
img_blur,img_thres,10100;
Imgproc.findContours(img_thres,等高线,new Mat(),Imgproc.RETR_列表,Imgproc.CHAIN_近似简单);
对于(int i=0;i20){
System.out.println(矩形x+”、“+矩形y+”、“+矩形高度+”、“+矩形宽度);
Mat subImg=新Mat();
Imgproc.resize(img.submat(rect),subImg,新大小(10,10));
//找到数字,然后尝试识别它
识别(subImg);
}
}
}
public void learn(){//获取训练数据并训练KNN
Mat样本,培训=新Mat(),res=新Mat();
对于(int i=1;i<10;i++){
字符串路径=String.format(“…/Documents/numbers/%03d.png”,i);
sample=Imgcodecs.imread(路径、Imgcodecs.CV\u加载\u图像\u灰度);
材料m=新材料(新尺寸(1,1),CvType.CV_32FC1);
m、 setTo(新标量(i));
res.推回(m);
培训模拟推回(准备(样本));
}
model=KNearest.create();
模型训练(训练img,Ml.ROW样本,res);
}
私有Mat prepareImg(Mat img){//以正确的格式更改图像
材料样品=新材料(),尺寸=新材料();
Imgproc.resize(img,sized,new Size(10,10));
调整尺寸。重塑(1,1)。转换为(样品,CvType.CV_32FC1);
返回样品;
}
公共无效识别(Mat getImg){
Mat结果=新Mat();
Mat dists=新Mat();
float result=model.findNearest(prepareImg(getImg),2,results,new Mat(),dists);
//结果应该是getImg中的数字
系统输出打印项次(结果);
}`
OpenCV错误:断言失败(test_samples.type()==CV_32F&&
测试_samples.cols==samples.cols)中的
cv::ml::BruteForceImpl::findNearest,文件
C:\builds\master\u PackSlaveAddon-win64-vc12-static\opencv\modules\ml\src\knearest.cpp,
线程“main”CvException中的第325行异常
[org.opencv.core.CvException:cv::Exception:
C:\builds\master\u PackSlaveAddon-win64-vc12-static\opencv\modules\ml\src\knearest.cpp:325:
错误:(-215)test_samples.type()==CV_32F&&test_samples.cols==
函数cv::ml::BruteForceImpl::findNearest中的samples.cols]
非常感谢