Fix spelling, spacing, and unused variables (opencv#236)

* Fix spelling, spacing, and unused variables

* Fixed typo in 3 more models

* Added open back

* Remove setBackendAndTarget functions from C++ demos, which are unused functionality.

Author: ryan1288

models/face_detection_yunet/demo.cpp

@@ -31,13 +31,6 @@ class YuNet
         model = cv::FaceDetectorYN::create(model_path_, "", input_size_, conf_threshold_, nms_threshold_, top_k_, backend_id_, target_id_);
     }
 
-    void setBackendAndTarget(int backend_id, int target_id)
-    {
-        backend_id_ = backend_id;
-        target_id_ = target_id;
-        model = cv::FaceDetectorYN::create(model_path_, "", input_size_, conf_threshold_, nms_threshold_, top_k_, backend_id_, target_id_);
-    }
-
     /* Overwrite the input size when creating the model. Size format: [Width, Height].
     */
     void setInputSize(const cv::Size& input_size)

models/image_classification_mobilenet/demo.cpp

@@ -69,7 +69,7 @@ int main(int argc, char** argv)
     else
         cap.open(0);
     if (!cap.isOpened())
-        CV_Error(Error::StsError, "Cannot opend video or file");
+        CV_Error(Error::StsError, "Cannot open video or file");
     Mat frame, blob;
     static const std::string kWinName = model;
     int nbInference = 0;

models/object_detection_nanodet/demo.cpp

@@ -46,7 +46,8 @@ class NanoDet
     {
         this->strides = { 8, 16, 32, 64 };
         this->net = readNet(modelPath);
-        setBackendAndTarget(bId, tId);
+        this->net.setPreferableBackend(bId);
+        this->net.setPreferableTarget(tId);
         this->project = Mat::zeros(1, this->regMax + 1, CV_32F);
         for (size_t i = 0; i <= this->regMax; ++i) 
         {
@@ -57,12 +58,6 @@ class NanoDet
         this->generateAnchors();
     }
 
-    void setBackendAndTarget(Backend bId, Target tId)
-    {
-        this->net.setPreferableBackend(bId);
-        this->net.setPreferableTarget(tId);
-    }
-
     Mat preProcess(const Mat& inputImage)
     {
         Image2BlobParams paramNanodet;

models/object_detection_nanodet/demo.py

@@ -148,7 +148,7 @@ def vis(preds, res_img, letterbox_scale, fps=None):
         img = vis(preds, image, letterbox_scale)
 
         if args.save:
-            print('Resutls saved to result.jpg\n')
+            print('Results saved to result.jpg\n')
             cv.imwrite('result.jpg', img)
 
         if args.vis:

models/object_detection_yolox/demo.cpp

@@ -61,14 +61,6 @@ class YoloX {
         this->generateAnchors();
     }
 
-    void setBackendAndTarget(dnn::Backend bId, dnn::Target tId)
-    {
-        this->backendId = bId;
-        this->targetId = tId;
-        this->net.setPreferableBackend(this->backendId);
-        this->net.setPreferableTarget(this->targetId);
-    }
-
     Mat preprocess(Mat img)
     {
         Mat blob;
@@ -137,7 +129,7 @@ class YoloX {
             boxesXYXY[r].height = boxes_xyxy.at<float>(r, 3);
         }
 
-        vector< int > keep;
+        vector<int> keep;
         NMSBoxesBatched(boxesXYXY, maxScores, maxScoreIdx, this->confThreshold, this->nmsThreshold, keep);
         Mat candidates(int(keep.size()), 6, CV_32FC1);
         int row = 0;
@@ -282,7 +274,7 @@ int main(int argc, char** argv)
     else
         cap.open(0);
     if (!cap.isOpened())
-        CV_Error(Error::StsError, "Cannot opend video or file");
+        CV_Error(Error::StsError, "Cannot open video or file");
     Mat frame, inputBlob;
     double letterboxScale;
 

models/object_detection_yolox/demo.py

@@ -120,7 +120,7 @@ def vis(dets, srcimg, letterbox_scale, fps=None):
         img = vis(preds, image, letterbox_scale)
 
         if args.save:
-            print('Resutls saved to result.jpg\n')
+            print('Results saved to result.jpg\n')
             cv.imwrite('result.jpg', img)
 
         if args.vis:

models/person_detection_mediapipe/demo.cpp

@@ -43,14 +43,6 @@ class MPPersonDet {
         this->anchors = getMediapipeAnchor();
     }
 
-    void setBackendAndTarget(dnn::Backend bId, dnn::Target tId)
-    {
-        this->backendId = bId;
-        this->targetId = tId;
-        this->net.setPreferableBackend(this->backendId);
-        this->net.setPreferableTarget(this->targetId);
-    }
-
     pair<Mat, Size> preprocess(Mat img)
     {
         Mat blob;
@@ -237,10 +229,9 @@ int main(int argc, char** argv)
         backendTargetPairs[backendTargetid].first, backendTargetPairs[backendTargetid].second);
     //! [Open a video file or an image file or a camera stream]
     if (!cap.isOpened())
-        CV_Error(Error::StsError, "Cannot opend video or file");
+        CV_Error(Error::StsError, "Cannot open video or file");
 
     static const std::string kWinName = "MPPersonDet Demo";
-    int nbInference = 0;
     while (waitKey(1) < 0)
     {
         cap >> frame;

models/pose_estimation_mediapipe/demo.cpp

@@ -45,14 +45,6 @@ class MPPersonDet {
         this->anchors = getMediapipeAnchor();
     }
 
-    void setBackendAndTarget(dnn::Backend bId, dnn::Target tId)
-    {
-        this->backendId = bId;
-        this->targetId = tId;
-        this->net.setPreferableBackend(this->backendId);
-        this->net.setPreferableTarget(this->targetId);
-    }
-
     pair<Mat, Size> preprocess(Mat img)
     {
         Mat blob;
@@ -124,7 +116,7 @@ class MPPersonDet {
         {
             rotBoxes[i] = Rect2d(Point2d(boxes.at<float>(i, 0), boxes.at<float>(i, 1)), Point2d(boxes.at<float>(i, 2), boxes.at<float>(i, 3)));
         }
-        vector< int > keep;
+        vector<int> keep;
         NMSBoxes(rotBoxes, score, this->scoreThreshold, this->nmsThreshold, keep, 1.0f, this->topK);
         if (keep.size() == 0)
             return Mat();
@@ -179,14 +171,6 @@ class MPPose {
         this->personBoxEnlargeFactor = 1.25;
     }
 
-    void setBackendAndTarget(dnn::Backend bId, dnn::Target tId)
-    {
-        this->backendId = bId;
-        this->targetId = tId;
-        this->net.setPreferableBackend(this->backendId);
-        this->net.setPreferableTarget(this->targetId);
-    }
-
     tuple<Mat, Mat, float, Mat, Size> preprocess(Mat image, Mat person)
     {
         /***
@@ -567,7 +551,7 @@ int main(int argc, char** argv)
     MPPose poseEstimator(model, confThreshold, backendTargetPairs[backendTargetid].first, backendTargetPairs[backendTargetid].second);
     //! [Open a video file or an image file or a camera stream]
     if (!cap.isOpened())
-        CV_Error(Error::StsError, "Cannot opend video or file");
+        CV_Error(Error::StsError, "Cannot open video or file");
 
     static const std::string kWinName = "MPPose Demo";
     while (waitKey(1) < 0)

models/text_detection_ppocr/demo.cpp

@@ -124,7 +124,7 @@ int main(int argc, char** argv)
     else
         cap.open(0);
     if (!cap.isOpened())
-        CV_Error(Error::StsError, "Cannot opend video or file");
+        CV_Error(Error::StsError, "Cannot open video or file");
     Mat originalImage;
     static const std::string kWinName = modelName;
     while (waitKey(1) < 0)

models/text_recognition_crnn/demo.cpp

@@ -224,7 +224,7 @@ int main(int argc, char** argv)
     else
         cap.open(0);
     if (!cap.isOpened())
-        CV_Error(Error::StsError, "Cannot opend video or file");
+        CV_Error(Error::StsError, "Cannot open video or file");
     Mat originalImage;
     static const std::string kWinName = modelPath;
     while (waitKey(1) < 0)

models/text_recognition_crnn/demo.py

@@ -106,7 +106,7 @@ def visualize(image, boxes, texts, color=(0, 255, 0), isClosed=True, thickness=2
 
         # Save results if save is true
         if args.save:
-            print('Resutls saved to result.jpg\n')
+            print('Results saved to result.jpg\n')
             cv.imwrite('result.jpg', original_image)
 
         # Visualize results in a new window