使用 python (openCV) 删除背景图像

Question

I am new to computer version, I am trying to remove the background of the image given and make it white background. I have tried most of the codes shared here but non is working on my image.

• code_1
• code_2
• code_3
• code_4

input:

desired output:

Answer 1

If you remove background you not have your desider output.

The object in the image have a different processing, similar negative, but isn't negative.

If it was negative you got this result:

From output image it's very difficult understand what operations have been carried out.

Answer 2

Here is a simple way to do that in Python/OpenCV/Numpy.

Convert to gray. Copy the input and use Numpy to change the background to white where gray is close to black.

Input:

import cv2
import numpy as np

# read image
img = cv2.imread("a_blob.jpg")

# convert img to grayscale
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

# change black to white
result = img.copy()
result[gray<=2] = (255,255,255)

# write results to disk
cv2.imwrite("a_blob_white.jpg", result)

# show results
cv2.imshow("RESULT", result)
cv2.waitKey(0)

Result: