import cv2
import numpy as np
import os

def viz_unwarp():
    img_path = "seal_cropped.png"
    img = cv2.imread(img_path)
    if img is None:
        print("Image not found")
        return
    
    h, w = img.shape[:2]
    cx, cy = w//2, h//2
    radius = min(cx, cy)
    
    # Try different factors
    for factor in [1.0, 2.0, 3.0, 4.0]:
        out_w = int(radius * 2 * np.pi * factor)
        out_h = radius
        unwarped = cv2.warpPolar(img, (out_w, out_h), (cx, cy), radius, cv2.WARP_POLAR_LINEAR)
        cv2.imwrite(f"debug_viz_f{factor}.png", unwarped)
        print(f"Saved debug_viz_f{factor}.png shape={unwarped.shape}")

if __name__ == "__main__":
    viz_unwarp()