viewer

cvview.py

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+import os
+import cv2
+import argparse
+
+# Set up the argument parser
+parser = argparse.ArgumentParser(description="Visualize image files and display pixel values on hover.")
+parser.add_argument('path', help='The path to an image file.')
+
+# Parse the arguments
+args = parser.parse_args()
+img_path = args.path
+
+
+# Function to display the image and pixel values along with the frame index
+def show_pixel_values(image_path):
+    def mouse_event(event, x, y, flags, param):
+        if event == cv2.EVENT_MOUSEMOVE:
+            pixel_value = img[y, x]
+            text = f'Value: {pixel_value}, Location: ({x},{y})'
+            img_text = img.copy()
+            # Overlay the frame index
+            frame_index = get_frame_index(image_path)
+            cv2.putText(img_text, f'Frame: {frame_index}', (10, img_text.shape[0] - 10), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (255, 255, 255), 1, cv2.LINE_AA)
+            cv2.putText(img_text, text, (50, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (255, 255, 255), 1, cv2.LINE_AA)
+            cv2.imshow('Image', img_text)
+
+    img = cv2.imread(image_path, cv2.IMREAD_UNCHANGED)
+    if img is None:
+        print(f"Failed to load image at {image_path}. Check the file path and integrity.")
+        return False
+    cv2.namedWindow('Image')
+    cv2.setMouseCallback('Image', mouse_event)
+    cv2.imshow('Image', img)
+    return True
+
+
+# Function to get the frame index from the filename
+def get_frame_index(filename):
+    return os.path.splitext(os.path.basename(filename))[0][-4:]
+
+
+# Function to modify the numeric part of the filename
+def modify_filename(filename, increment=True):
+    directory, basename = os.path.split(filename)
+    basename_no_ext, ext = os.path.splitext(basename)
+    print(f"Modifying filename {basename_no_ext} in directory {directory}.")
+    if len(basename_no_ext) < 4 or not basename_no_ext[-4:].isdigit():
+        raise ValueError("Filename does not end with five digits.")
+    num_part = basename_no_ext[-4:]
+    num = int(num_part) + (1 if increment else -1)
+    new_name = f"{basename_no_ext[:-4]}{num:04d}{ext}"
+    new_path = os.path.join(directory, new_name)
+    if not os.path.exists(new_path):
+        print(f"No file found at {new_path}.")
+        return filename  # Return the original filename if the new file does not exist
+    return new_path
+
+
+# Ensure the provided path is a valid file
+if not os.path.isfile(img_path):
+    print("The provided path is not a valid file.")
+    exit(1)
+
+# Initially display the image
+if not show_pixel_values(img_path):
+    exit(1)
+
+# Main loop to navigate through images
+while True:
+    key = cv2.waitKey(0)
+    if key == 27:  # ESC key to exit
+        break
+    elif key == 91:  # '[' key
+        img_path = modify_filename(img_path, increment=False)
+    elif key == 93:  # ']' key
+        img_path = modify_filename(img_path, increment=True)
+
+    # Show the new image
+    if not show_pixel_values(img_path):
+        break  # Exit the loop if the new image cannot be loaded
+
+cv2.destroyAllWindows()