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what is mean? which header? which namesmace? please put the used namespaces when you use such non standard functions.

Mehdi
– Mehdi

2020-04-17 13:15:43 +00:00
Commented Apr 17, 2020 at 13:15
1

The problem is not that "the image is 2D" but that an image can have multiple color planes (B,G,R normally for color images in openCV) and the mean value is taken per color plane giving you one value per color plane hence the Scalar. Your solution gives you the average of the blue portion of the image (unless that is a grayscale image).

Bjørn van Dommelen
– Bjørn van Dommelen

2021-03-24 06:01:47 +00:00
Commented Mar 24, 2021 at 6:01

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Correct minor typos or mistakes
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Always respect the author’s intent
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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
to make links (use https whenever possible)

<https://example.com>

[example](https://example.com)

<a href="https://example.com">example</a>

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