[英]CV2 Image Memory
I have a function to draw rectangles on an image.我有一个在图像上绘制矩形的函数。 The input image is always the same but after I run the function to draw and plot the image with contours if I run it again, it keeps the old contour.输入图像总是相同的,但是在我运行函数来绘制和绘制带有轮廓的图像后,如果我再次运行它,它会保留旧的轮廓。 The original image is read at the beginning of the function every time so I don't understand why it doesn't initialize it as if no contour were drawn previously.每次在函数开始时都会读取原始图像,所以我不明白为什么它不初始化它,就好像之前没有绘制轮廓一样。
I'm new to python and opencv
.我是 python 和opencv
新手。 Please let me know if you have any suggestion to clear the image before applying contours again如果您有任何建议在再次应用轮廓之前清除图像,请告诉我
def get_last_col(date_headers):
n_tables = len(date_headers)
print(n_tables)
image=date_headers[0][0]
for header in date_headers:
h_d = header[1]
page_h = image.shape[0]
last_col = h_d[h_d.bloc_x==max(h_d.bloc_x)]
last_col['width'] = last_col.bloc_xw - last_col.bloc_x
min_w = int(min(last_col.width))
# X of most bottom left corner date in header
bottom_left = min( int(min(last_col['bloc_x'])-50), int(min(last_col['bloc_x'])-min_w) )
# Y of of most bottom date element
bottom_top = int(last_col.Y_DATE)-20
#X of most bottom right corner date in header
bottom_right = int(max(h_d['bloc_xw'])+min_w)-10
cv2.rectangle(image, (bottom_left,bottom_top), (bottom_right,page_h), (36,255,12), 2)
plt.figure(figsize = (30,30))
plt.imshow(image)
Examples after running the function once and then once again with a different contour运行该函数一次后的示例,然后使用不同的轮廓再次运行
我通过使用图像的副本 (date_headers[0][0].copy()) 弄清楚了
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