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[Solved] TypeError: Required argument ‘mat’ (pos 2) not found

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error TypeError: Required argument ‘mat’ (pos 2) not found in python. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How TypeError: Required argument ‘mat’ (pos 2) not found Error Occurs?

Today I get the following error TypeError: Required argument ‘mat’ (pos 2) not found in python.

How To Solve TypeError: Required argument ‘mat’ (pos 2) not found Error ?

  1. How To Solve TypeError: Required argument 'mat' (pos 2) not found Error ?

    To Solve TypeError: Required argument 'mat' (pos 2) not found Error cv2 didn't the find the “mat” (matrix), because you passed the image as the first argument, but the first argument is supposed to be the window name.

  2. TypeError: Required argument 'mat' (pos 2) not found

    To Solve TypeError: Required argument 'mat' (pos 2) not found Error cv2 didn't the find the “mat” (matrix), because you passed the image as the first argument, but the first argument is supposed to be the window name.

Solution 1

The first argument to cv2.imshow is the window name, so it’s considering the second input mat (the image) as missing. If you don’t want to name the window, you can just give an empty string as the first input parameter.

cv2.imshow('', frame) 

Solution 2

cv2 didn’t the find the “mat” (matrix), because you passed the image as the first argument, but the first argument is supposed to be the window name.

cv2.imshow(winname, mat)

In most cases, you don’t care about the window name, so use this:

cv2.imshow('', frame)
cv2.waitKey(0)

This is the result when you change the window name:

import numpy as np
import cv2

image = np.full((300, 300, 3), 255).astype(np.uint8)

cv2.putText(image, 'some picture', (20, 60),
            cv2.FONT_HERSHEY_SIMPLEX, 1, [0, 0, 0])

cv2.imshow('custom window name', image)
cv2.waitKey(0)
enter image description here

One of the reasons you might want to change window names is to plot many pictures at once, in different windows.

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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