How to find the average pixel value for a rectangular region

opencv

asked 2017-08-03 02:46:07 -0600

arqam
36 ●1 ●2 ●6

I have a rectangular region in an image and have to calculate the average value.

One way I can do is parsing through each pixel value to calculate the average, but that is not an efficient way. Is there any better approach to do in openCV, preferably JAVA.

edit retag flag offensive close merge delete

add a comment

1

answered 2017-08-03 03:29:02 -0600

StevenPuttemans

20029 ●16 ●82 ●207 http://stevenputtemans...

MeanStdDev function is all you need: http://docs.opencv.org/master/d2/de8/...

But I am unsure if it is in Java available, since the java docs stop at 3.0.0 and I cannot find it there.

edit flag offensive delete link

add a comment

-1

answered 2017-08-03 03:53:21 -0600

Kharoud
1 ●1

Firstly store rectangular region in another matrix and then you can use meanStdDev to calculate mean value of matrix.

edit flag offensive delete link

Comments

? How is this different to my response ?

StevenPuttemans ( 2017-08-03 04:07:57 -0600 )edit

As only mean of rectangular region in image is required, so rectangular region should be cropped before applying meanStdDev.

Kharoud ( 2017-08-03 23:04:54 -0600 )edit

He said he already has that region ...

StevenPuttemans ( 2017-08-04 06:05:32 -0600 )edit

add a comment

How to find the average pixel value for a rectangular region

2 answers

Comments

Links

Question Tools

Stats

Related questions

How to find the average pixel value for a rectangular region edit

2 answers

Comments

Links

Question Tools

Stats

Related questions

How to find the average pixel value for a rectangular region