[Python] I have to remove raindrops from a scene , and I am using python with opencv. But I am...

I did try to remove rain drops and wrote the code , but not able to maintain the quality. I am seeking help to do so . I need to improve my code and I need help with my code

import cv2 as cv
import numpy as np

# Load the image
image_path = "C:/Users/kavit/Downloads/RAIN.png" # Update this path to your image file
image = cv.imread(image_path)

# Check if the image is loaded correctly
if image is None:
raise Exception("Error: Could not load the image.")

# Convert the image to grayscale
gray = cv.cvtColor(image, cv.COLOR_BGR2GRAY)

# Apply a Gaussian blur to reduce noise and minor raindrop streaks
blurred = cv.GaussianBlur(gray, (5, 5), 0)

# Use adaptive thresholding to detect raindrops with more sensitivity
mask = cv.adaptiveThreshold(blurred, 255, cv.ADAPTIVE_THRESH_MEAN_C,
cv.THRESH_BINARY_INV, 11, 2)

# Combine with Canny edge detection to capture more details of raindrops
edges = cv.Canny(blurred, threshold1=20, threshold2=60)
combined_mask = cv.bitwise_or(mask, edges)

# Apply stronger morphological operations to clean the mask more thoroughly
kernel = np.ones((5, 5), np.uint8) # Increase kernel size
mask_cleaned = cv.dilate(combined_mask, kernel, iterations=5) # More dilation
mask_cleaned = cv.erode(mask_cleaned, kernel, iterations=4) # More erosion

# Use inpainting with a larger radius to cover remaining rain streaks
inpainted_image_ns = cv.inpaint(image, mask_cleaned, 10, cv.INPAINT_NS)
inpainted_image_telea = cv.inpaint(image, mask_cleaned, 15, cv.INPAINT_TELEA)

# Blend the two inpainted results for more comprehensive raindrop removal
inpainted_image = cv.addWeighted(inpainted_image_ns, 0.5, inpainted_image_telea, 0.5, 0)

# Apply selective sharpening to restore some of the lost quality
sharpen_kernel = np.array([[-1, -1, -1], [-1, 9, -1], [-1, -1, -1]])
sharpened_image = cv.filter2D(inpainted_image, -1, sharpen_kernel)

# Display the results
cv.imshow('Original Image with Raindrops', image)
cv.imshow('Refined Raindrop Mask', mask_cleaned)
cv.imshow('Final Image without Raindrops', sharpened_image)

# Wait until a key is pressed to close the windows
cv.waitKey(0)
cv.destroyAllWindows()

# Save the result to your desired path
cv.imwrite("C:/Users/kavit/Downloads/raindrop_removed_final_improved_v2.png", sharpened_image)

Continue reading...