extract regions and save by MSER

mser.py

import sys
import numpy as np
import cv2

def extract_region(img, region):
    top_left = np.min(region, axis=0)
    bottom_right = np.max(region, axis=0)

    margin = 2
    region_of_image = img.copy()[top_left[1]-margin:bottom_right[1]+margin, top_left[0]-margin:bottom_right[0]+margin]
    return region_of_image

mser = cv2.MSER(_min_area=10, _max_area=500)
img = cv2.imread(sys.argv[1])
blue, green, red = cv2.split(img)
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
vis = img.copy()

regions = mser.detect(gray)

i = 0
for region in regions:
    roi = extract_region(img, region)
    cv2.imwrite('tmp/%d.png' % (i), roi)
    i += 1