Clone an image in cv2 python

Question

I m new to opencv  here is a question  what is the python function which act the same as cv  clone   in cpp  I just try to get a rect by       rectImg   img 10 20  10 20    but when I draw a line on it  I find the line appear both on img and the rectImage so   how can I get this done

User · Answer

You can simply use Python standard library  Make a shallow copy of the original image as follows    import copy  original img   cv2 imread  foo jpg   clone img   copy copy original img

User · Answer

Using python 3 and opencv-python version 4 4 0  the following code should work  img src   cv2 imread  image png   img clone   img src copy

User · Answer

The first answer is correct but you say that you are using cv2 which inherently uses numpy arrays  So  to make a complete different copy of say  myImage    newImage   myImage copy     The above is enough  No need to import numpy

User · Answer

My favorite method uses cv2 copyMakeBorder with no border  like so   copy   cv2 copyMakeBorder original 0 0 0 0 cv2 BORDER REPLICATE

User · Answer

If you use cv2  correct method is to use  copy   method in Numpy  It will create a copy of the array you need  Otherwise it will produce only a view of that object   eg   In  1   import numpy as np  In  2   x   np arange 10 10  reshape  10 10    In  4   y   x 3 7 3 7  copy    In  6   y 2 2    1000  In  8   1000 in x Out 8   False       see  1000 in y doesn t change values in x  parent array

[python] Clone an image in cv2 python

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