Using OpenCV, how can I draw a similar interface and, caputure the ROI inside it ?
How this is called ? It's a opencv mask ? I would like, more than code, know the terms/steps I have to search to achieve this.
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try something like: framing, bounding box, contouring – Tommaso Di Noto Nov 28 '18 at 15:01
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Try [this](http://funvision.blogspot.com/2015/12/basic-opencv-3-mat-tutorial-part-2-roi.html), it is C++ but you can convert it to python easily. – Quang Hoang Nov 28 '18 at 17:22
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@QuangHoang it's not what I am searching for. Thanks anyway – lucians Nov 28 '18 at 17:57
1 Answers
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I take the image from this question.
Here is my steps:
(1) First crop and backup the roi;
(2) Then divide the image by 2;
(3) Then past the roi into the origin image.
This is my result:
The code:
# 2018/11/29 08:20 (CST)
import cv2
fname = "draw.jpg"
img = cv2.imread(fname)
sx, sy = (70, 120)
rw, rh = (410, 360)
roi = img[sy:sy+rh, sx:sx+rw].copy()
img //= 2
img[sy:sy+rh, sx:sx+rw] = roi
cv2.imwrite("dst.png", img)
