I'm trying to apply a flood_fill method to a certain image. Unfortunately, even though it works on an exemplary image, it doesn't work on mine, which is already binarized.
The code that works:
from skimage import data, filters
from skimage.segmentation import flood, flood_fill
import cv2 as cv
cameraman = data.camera()
flooded = flood_fill(cameraman, (200, 100), 255, tolerance=10)
cv.imshow("aaa",flooded)
cv.waitKey()
And the code that does not:
from skimage import data, filters
from skimage.segmentation import flood, flood_fill
import cv2 as cv
import numpy as np
img = cv.imread("Tubka_binar.png")
flooded = flood_fill(img, (200, 100), 100, tolerance = 10)
cv.imshow("aaa",flooded)
cv.waitKey()
And the errors I get:
Traceback (most recent call last):
File "C:/Users/User/Documents/PW/MAGISTERSKIE/__PRACA/Python/Grubość Tuby.py", line 8, in <module>
flooded = flood_fill(img, (200, 100), 100, tolerance = 10)
File "C:\Users\User\Desktop\PROJEKT_PYTHONOWY\venv\lib\site-packages\skimage\morphology\_flood_fill.py", line 104, in flood_fill
tolerance=tolerance)
File "C:\Users\User\Desktop\PROJEKT_PYTHONOWY\venv\lib\site-packages\skimage\morphology\_flood_fill.py", line 235, in flood
working_image.shape, order=order)
File "<__array_function__ internals>", line 6, in ravel_multi_index
ValueError: parameter multi_index must be a sequence of length 3
Process finished with exit code 1
The image variables in both cases seem to be the same type. The image that I read in the second case is a binarized photo, that takes only two values: 0 and 255.
What is causing this? Best regards
It looks to me like your second image is not actually grayscale but rather saved (or loaded) as a 3-channel RGB image. If you print img.shape, I bet it’ll be something like (512, 512, 3). You can fix this by changing your reading code to:
img = cv.imread("Tubka_binar.png")[..., 0]