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提取MSER检测区域(Python,OpenCV)

作者:互联网

我无法在此图像中通过MSER提取检测到的区域:

img

我想要做的是保存绿色边界区域.
我的实际代码是这样的:

import cv2
import numpy as np

mser = cv2.MSER_create()
img = cv2.imread('C:\\Users\\Link\\img.tif')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
vis = img.copy()
regions, _ = mser.detectRegions(gray)
hulls = [cv2.convexHull(p.reshape(-1, 1, 2)) for p in regions]
cv2.polylines(vis, hulls, 1, (0, 255, 0))

mask = np.zeros((img.shape[0], img.shape[1], 1), dtype=np.uint8)
mask = cv2.dilate(mask, np.ones((150, 150), np.uint8))
for contour in hulls:
    cv2.drawContours(mask, [contour], -1, (255, 255, 255), -1)

    text_only = cv2.bitwise_and(img, img, mask=mask)


cv2.imshow('img', vis)
cv2.waitKey(0)
cv2.imshow('mask', mask)
cv2.waitKey(0)
cv2.imshow('text', text_only)
cv2.waitKey(0)

预期结果应该是像图像的ROI.

out

来源图片:

src

解决方法:

只需获取每个轮廓的边界框,将其用作ROI以提取区域并将其保存:

for i, contour in enumerate(hulls):
    x,y,w,h = cv2.boundingRect(contour)
    cv2.imwrite('{}.png'.format(i), img[y:y+h,x:x+w])

标签:bounding-box,python,opencv,mser
来源: https://codeday.me/bug/20191007/1865894.html