Highlight the closest target with a different color in predictions

detect.py

@@ -35,6 +35,7 @@
 import sys
 from pathlib import Path
 
+import numpy as np
 import torch
 
 FILE = Path(__file__).resolve()
@@ -130,30 +131,20 @@ def run(
 
     # Run inference
     model.warmup(imgsz=(1 if pt or model.triton else bs, 3, *imgsz))  # warmup
-    seen, windows, dt = 0, [], (Profile(device=device), Profile(device=device), Profile(device=device))
+    seen, windows, dt = 0, [], (Profile(), Profile(), Profile())
     for path, im, im0s, vid_cap, s in dataset:
         with dt[0]:
             im = torch.from_numpy(im).to(model.device)
             im = im.half() if model.fp16 else im.float()  # uint8 to fp16/32
             im /= 255  # 0 - 255 to 0.0 - 1.0
             if len(im.shape) == 3:
                 im = im[None]  # expand for batch dim
-            if model.xml and im.shape[0] > 1:
-                ims = torch.chunk(im, im.shape[0], 0)
 
         # Inference
         with dt[1]:
             visualize = increment_path(save_dir / Path(path).stem, mkdir=True) if visualize else False
-            if model.xml and im.shape[0] > 1:
-                pred = None
-                for image in ims:
-                    if pred is None:
-                        pred = model(image, augment=augment, visualize=visualize).unsqueeze(0)
-                    else:
-                        pred = torch.cat((pred, model(image, augment=augment, visualize=visualize).unsqueeze(0)), dim=0)
-                pred = [pred, None]
-            else:
-                pred = model(im, augment=augment, visualize=visualize)
+            pred = model(im, augment=augment, visualize=visualize)
+
         # NMS
         with dt[2]:
             pred = non_max_suppression(pred, conf_thres, iou_thres, classes, agnostic_nms, max_det=max_det)
@@ -166,7 +157,6 @@ def run(
 
         # Create or append to the CSV file
         def write_to_csv(image_name, prediction, confidence):
-            """Writes prediction data for an image to a CSV file, appending if the file exists."""
             data = {"Image Name": image_name, "Prediction": prediction, "Confidence": confidence}
             with open(csv_path, mode="a", newline="") as f:
                 writer = csv.DictWriter(f, fieldnames=data.keys())
@@ -190,10 +180,37 @@ def write_to_csv(image_name, prediction, confidence):
             gn = torch.tensor(im0.shape)[[1, 0, 1, 0]]  # normalization gain whwh
             imc = im0.copy() if save_crop else im0  # for save_crop
             annotator = Annotator(im0, line_width=line_thickness, example=str(names))
+
+            # Calculate the center of the image
+            img_center = np.array([im0.shape[1] // 2, im0.shape[0] // 2])
+            min_distance = None
+            closest_box = None
+
             if len(det):
                 # Rescale boxes from img_size to im0 size
                 det[:, :4] = scale_boxes(im.shape[2:], det[:, :4], im0.shape).round()
 
+                # Calculate the center of the image
+                img_center = np.array([im0.shape[1] // 2, im0.shape[0] // 2])
+
+                # Calculate centers of all detection boxes and find the closest one to the image center
+                centers = np.array(
+                    [
+                        [(xyxy[0].cpu() + xyxy[2].cpu()) / 2, (xyxy[1].cpu() + xyxy[3].cpu()) / 2]
+                        for *xyxy, _, _ in reversed(det)
+                    ]
+                )
+                distances = np.linalg.norm(centers - img_center, axis=1)
+                closest_idx = np.argmin(distances)
+
+                # Draw boxes, marking the closest one in green
+                for j, (*xyxy, conf, cls) in enumerate(reversed(det)):
+                    color = (0, 255, 0) if j == closest_idx else colors(int(cls), True)
+                    annotator.box_label(xyxy, f"{names[int(cls)]} {conf:.2f}", color=color)
+
+                # Rescale boxes from img_size to im0 size
+                det[:, :4] = scale_boxes(im.shape[2:], det[:, :4], im0.shape).round()
+
                 # Print results
                 for c in det[:, 5].unique():
                     n = (det[:, 5] == c).sum()  # detections per class
@@ -265,7 +282,6 @@ def write_to_csv(image_name, prediction, confidence):
 
 
 def parse_opt():
-    """Parses command-line arguments for YOLOv5 detection, setting inference options and model configurations."""
     parser = argparse.ArgumentParser()
     parser.add_argument("--weights", nargs="+", type=str, default=ROOT / "yolov5s.pt", help="model path or triton URL")
     parser.add_argument("--source", type=str, default=ROOT / "data/images", help="file/dir/URL/glob/screen/0(webcam)")
@@ -302,11 +318,13 @@ def parse_opt():
 
 
 def main(opt):
-    """Executes YOLOv5 model inference with given options, checking requirements before running the model."""
     check_requirements(ROOT / "requirements.txt", exclude=("tensorboard", "thop"))
     run(**vars(opt))
 
 
+# python detect.py --weights runs/train/exp10/weights/best.pt --source project/test
+# python detect.py --weights runs/train/exp10/weights/best.pt --source project/test
+
 if __name__ == "__main__":
     opt = parse_opt()
     main(opt)