【发布时间】:2017-09-13 17:16:07
【问题描述】:
使用下一个代码,我可以拍摄图像并将其分成包含感兴趣区域的多个较小图像。
import cv2
import sys
sys.path.insert(0, 'C:\\Users\\Bob\\Desktop\\Project')
sys.path.insert(0, 'C:\\Users\\Bob\\Desktop\\Project\\FOLDER')
sys.path.insert(0, 'C:\\Users\\Bob\\Desktop\\Project\\READER')
import FOLDER.folders
import READER.extractor
timestr = FOLDER.folders.timestr
################## AREA 1 ##################
# Load the image
img = cv2.imread('C:\\Users\\Bob\\Desktop\\Destination\\' + str(timestr) + '\\EXTRACTED\\' + 'area1.png')
# convert to grayscale
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
# smooth the image to avoid noises
gray = cv2.medianBlur(gray,5)
# Apply adaptive threshold
thresh = cv2.adaptiveThreshold(gray,255,1,1,11,2)
thresh_color = cv2.cvtColor(thresh,cv2.COLOR_GRAY2BGR)
# apply some dilation and erosion to join the gaps - change iterations value to detect more or less area's
thresh = cv2.dilate(thresh,None,iterations = 15)
thresh = cv2.erode(thresh,None,iterations = 15)
# Find the contours
image,contours,hierarchy = cv2.findContours(thresh,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
# For each contour, find the bounding rectangle and draw it
idx =0
for cnt in contours:
idx += 1
x,y,w,h = cv2.boundingRect(cnt)
roi = gray[y:y + h, x:x + w]
cv2.rectangle(img,(x,y),(x+w,y+h),(0,255,0),2)
cv2.rectangle(thresh_color,(x,y),(x+w,y+h),(0,255,0),2)
cv2.imwrite('C:\\Users\\Bob\\Desktop\\Destination\\' + str(timestr) + '\\EXTRACTED\\ex_area1' + str(idx) + '.png',roi)
这是一个例子:
图片已加载
输出
代码还给出了一些我不想要的次要图像(比如说人工制品)。所有这些图片都低于某些特定尺寸。
我的问题是:我必须在上面的代码中添加什么来删除这些图像?要删除以下尺寸的图像,例如:250(宽度)X 60(高度)像素?
谢谢
提示:使用此代码检测区域:Improve text area detection (OpenCV, Python)
【问题讨论】:
标签: python opencv image-processing