/Python/Stackoverflow ocr,cropping letters

Stackoverflow ocr,cropping letters

import cv2
import numpy as np

#import image
image = cv2.imread('image.png')

#grayscale
gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY)
cv2.imshow('gray', gray)
cv2.waitKey(0)

#binary
ret,thresh = cv2.threshold(gray,127,255,cv2.THRESH_BINARY_INV)
cv2.imshow('second', thresh)
cv2.waitKey(0)

#dilation
kernel = np.ones((1,1), np.uint8)
img_dilation = cv2.dilate(thresh, kernel, iterations=1)
cv2.imshow('dilated', img_dilation)
cv2.waitKey(0)

#find contours
im2,ctrs, hier = cv2.findContours(img_dilation.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

#sort contours
sorted_ctrs = sorted(ctrs, key=lambda ctr: cv2.boundingRect(ctr)[0])

for i, ctr in enumerate(sorted_ctrs):
    # Get bounding box
    x, y, w, h = cv2.boundingRect(ctr)

    # Getting ROI
    roi = image[y:y+h, x:x+w]

    # show ROI
    #cv2.imshow('segment no:'+str(i),roi)
    cv2.rectangle(image,(x,y),( x + w, y + h ),(0,255,0),2)
    #cv2.waitKey(0)

    if w > 15 and h > 15:
        cv2.imwrite('roi{}.png'.format(i), roi)

cv2.imshow('marked areas',image)
cv2.waitKey(0)

Source: stackoverflow.com

Similar codes

4 votes242 views4 answers
Autocomplete in jupyter notebook
Python
1 vote278 views3 answers
Python if not null
Python
-1 vote270 views2 answers
Python dict remove duplicates where name are not the same
Python
81 votes243 views6 answers
Check python version
Python
51 votes255 views5 answers
Mr robot
Python
2 votes242 views3 answers
Nested dictionary Python
Python
0 vote242 views1 answer
Python send sms
Python
12 votes258 views5 answers
Merge two dataframes based on column
Python
0 vote255 views1 answer
Copy something character ubntil a specific character in python
Python
0 vote257 views1 answer
Python how to initialize wikipediaapi
Python