/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

0 vote103 views1 answer
How to subtract up everything in a list python
Python
6 votes164 views3 answers
Concatenate lists
Python
0 vote144 views1 answer
Matplotlib subplots share x axis
Python
1 vote142 views3 answers
How to sort values in python
Python
6 votes139 views1 answer
Get all combinations from two lists python
Python
0 vote134 views1 answer
Bgr to gray opencv
Python
2 votes106 views3 answers
Creating a dictionary
Python
0 vote129 views1 answer
Add text to axis
Python
0 vote137 views1 answer
Anvil get last row of data table
Python
114 votes127 views5 answers
How to use inputs in python
Python