Fixed issue #11

Author: SWHL

label_convert/vis_coco.py

@@ -3,9 +3,9 @@
 # @Contact: [email protected]
 import argparse
 import json
-import platform
 import random
 from pathlib import Path
+from typing import List, Tuple
 
 import cv2
 import numpy as np
@@ -17,30 +17,25 @@ def __init__(
     ):
         self.font_size = 0.7
 
-    def __call__(self, img_id: int, json_path, img_path):
-        with open(json_path, "r", encoding="utf-8") as annos:
-            anno_dict = json.load(annos)
-
+    def __call__(self, img_id: int, json_path: str, img_path: str):
+        anno_dict = self.read_json(json_path)
         anno_imgs = anno_dict.get("images", None)
         if anno_imgs is None:
             raise ValueError(f"The images of {json_path} cannot be empty.")
 
-        print("The anno_dict num_key is:", len(anno_dict))
-        print("The anno_dict key is:", anno_dict.keys())
-        print("The anno_dict num_images is:", len(anno_imgs))
+        print(f"The anno_dict num_key is: {len(anno_dict)}")
+        print(f"The anno_dict key is: {anno_dict.keys()}")
+        print(f"The anno_dict num_images is: {len(anno_imgs)}")
 
         categories = anno_dict["categories"]
         categories_dict = {c["id"]: c["name"] for c in categories}
 
         class_nums = len(categories_dict.keys())
-        color = [
-            (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
-            for _ in range(class_nums)
-        ]
+        color = self.get_class_color(class_nums)
 
         img_info = anno_dict["images"][img_id - 1]
-        img_name = img_info.get("file_name")
 
+        img_name = img_info.get("file_name")
         img_full_path = Path(img_path) / img_name
         image = cv2.imread(str(img_full_path))
 
@@ -57,50 +52,83 @@ def __call__(self, img_id: int, json_path, img_path):
             class_name = categories_dict[class_id]
             class_color = color[class_id - 1]
 
-            # plot sgmentations
             segs = anno.get("segmentation", None)
             if segs is not None:
-                segs = np.array(segs).reshape(-1, 2)
-                cv2.polylines(image, np.int32([segs]), 2, class_color)
-
-            # plot rectangle
-            x, y, w, h = [round(v) for v in anno["bbox"]]
-            cv2.rectangle(
-                image, (int(x), int(y)), (int(x + w), int(y + h)), class_color, 2
-            )
-
-            txt_size = cv2.getTextSize(
-                class_name, cv2.FONT_HERSHEY_SIMPLEX, self.font_size, 1
-            )[0]
-            cv2.rectangle(
-                image,
-                (x, y + 1),
-                (x + txt_size[0] + 5, y - int(1.5 * txt_size[1])),
-                class_color,
-                -1,
-            )
-            cv2.putText(
-                image,
-                class_name,
-                (x + 5, y - 5),
-                cv2.FONT_HERSHEY_SIMPLEX,
-                self.font_size,
-                (255, 255, 255),
-                1,
-            )
-
-        print("The unm_bbox of the display image is:", num_bbox)
-
-        cur_os = platform.system()
-        if cur_os == "Windows":
-            cv2.namedWindow(img_name, 0)
-            cv2.resizeWindow(img_name, 1000, 1000)
-            cv2.imshow(img_name, image)
-            cv2.waitKey(0)
-        else:
-            save_path = f"vis_{Path(img_name).stem}.jpg"
-            cv2.imwrite(save_path, image)
-            print(f"The {save_path} has been saved the current director.")
+                self.plot_segmentations(image, segs, class_color)
+                self.plot_text(image, segs[0][:2], class_color, class_name)
+
+            bbox = anno.get("bbox", None)
+            if bbox is None:
+                continue
+
+            self.plot_rectangle(image, bbox, class_color)
+            self.plot_text(image, bbox, class_color, class_name)
+
+        print(f"The unm_bbox of the display image is: {num_bbox}")
+        save_path = f"vis_{Path(img_name).stem}.jpg"
+        cv2.imwrite(save_path, image)
+        print(f"The {save_path} has been saved the current director.")
+
+    @staticmethod
+    def read_json(json_path):
+        with open(json_path, "r", encoding="utf-8") as f:
+            data = json.load(f)
+        return data
+
+    @staticmethod
+    def get_class_color(class_nums: int) -> List[Tuple[int]]:
+        def random_color():
+            return random.randint(0, 255)
+
+        color = [
+            (random_color(), random_color(), random_color()) for _ in range(class_nums)
+        ]
+        return color
+
+    @staticmethod
+    def plot_segmentations(
+        image: np.ndarray, segs: List[List[float]], class_color: Tuple[int]
+    ):
+        segs = np.array(segs).reshape(-1, 2)
+        cv2.polylines(image, np.int32([segs]), 2, class_color)
+
+    @staticmethod
+    def plot_rectangle(
+        image: np.ndarray,
+        bbox: List[float],
+        class_color: Tuple[int],
+        thickness: int = 1,
+    ):
+        x, y, w, h = [round(v) for v in bbox]
+        start_point = (int(x), int(y))
+        end_point = (int(x + w), int(y + h))
+        cv2.rectangle(image, start_point, end_point, class_color, thickness)
+
+    def plot_text(
+        self,
+        image: np.ndarray,
+        bbox: Tuple[float],
+        class_color: str,
+        class_name: str,
+    ):
+        txt_size = cv2.getTextSize(
+            class_name, cv2.FONT_HERSHEY_SIMPLEX, self.font_size, 1
+        )[0]
+
+        x, y = [round(v) for v in bbox[:2]]
+        start_point = (x, y + 1)
+        end_point = (x + txt_size[0] + 5, y - int(1.5 * txt_size[1]))
+        cv2.rectangle(image, start_point, end_point, class_color, -1)
+
+        cv2.putText(
+            image,
+            class_name,
+            (x + 5, y - 5),
+            cv2.FONT_HERSHEY_SIMPLEX,
+            self.font_size,
+            (255, 255, 255),
+            1,
+        )
 
 
 def main():