15. 이미지 변환(열림 & 닫힘)

In [1]:

from Custom.mediahelper import show_image_with_pil # 개발자 정의 모듈

15. 이미지 변환(열림 & 닫힘)¶

열림 (Opening): 침식 후 팽창. 깍아서 노이즈 제거 후 살 찌움¶

dilate(erode(image))

In [2]:

import cv2
import numpy as np

kernel = np.ones((3, 3), dtype=np.uint8)

img = cv2.imread('../Media/images/erode.png', cv2.IMREAD_GRAYSCALE)
img_color_reverse = cv2.bitwise_not(img) # 흑백전환

erode = cv2.erode(img_color_reverse, kernel, iterations = 3)
dilate = cv2.dilate(erode, kernel, iterations = 3) 

cv2.imshow('img_color_reverse',img_color_reverse)
cv2.imshow('erode',erode)
cv2.imshow('dilate',dilate)

cv2.waitKey(0)
cv2.destroyAllWindows()

show_image_with_pil(img_color_reverse, 'img_color_reverse')
show_image_with_pil(erode, 'erode')
show_image_with_pil(dilate, 'dilate')

'img_color_reverse'

'erode'

'dilate'

닫힘 (Closing): 팽창 후 침식. 구멍을 메운 후 다시 깍음¶

erode(dilate(image))

In [3]:

import cv2
import numpy as np

kernel = np.ones((3, 3), dtype=np.uint8)

img = cv2.imread('../Media/images/dilate.png', cv2.IMREAD_GRAYSCALE)
img_color_reverse = cv2.bitwise_not(img) # 흑백전환

dilate = cv2.dilate(img_color_reverse, kernel, iterations = 3) 
erode = cv2.erode(dilate, kernel, iterations = 3)

cv2.imshow('img_color_reverse',img_color_reverse)
cv2.imshow('dilate',dilate)
cv2.imshow('erode',erode)

cv2.waitKey(0)
cv2.destroyAllWindows()

show_image_with_pil(img_color_reverse, 'img_color_reverse')
show_image_with_pil(dilate, 'dilate')
show_image_with_pil(erode, 'erode')

'img_color_reverse'

'dilate'

'erode'