How to eliminate people's shadow or light noise in background subtraction? [closed]

asked 2017-01-04 20:37:46 -0600

hoang anh tuan
118 ●5 ●8 ●15

updated 2017-01-05 01:12:47 -0600

berak
32993 ●7 ●81 ●312

Hi everyone,

I am coding a program using background subtraction applying MoG2 method to detect moving objects. I have referred this program. However it cannot be applied if there is people's shadow or light noise. How can I remove them?

Thanks!

Closed for the following reason the question is answered, right answer was accepted by hoang anh tuan
close date 2018-05-09 03:37:55.229262

answered 2017-01-04 23:29:24 -0600

abhijith
136 ●1 ●6 http://sensoviz.com/

If you keep the shadow detection parameter as true, you'd get a gray area like this:

image description

Threshold this image to remove the gray areas and make it black. As for removing the noise, you'll have to try different morphological operations like dialation and erosion to get rid of it. This is the result for the image above:

image description

edit flag offensive delete link

Comments

Hi bro, Use threshold() to remove the gray areas?

hoang anh tuan ( 2017-01-05 01:24:35 -0600 )edit

Successfully. I know how to remove the gray areas. Set the correct value when use threshold

hoang anh tuan ( 2017-01-05 01:31:33 -0600 )edit

hey thanks dude.

vinodkumars ( 2017-01-05 01:37:28 -0600 )edit

Yup,threshold(). A value of around 200 for the thresh parameter and 255 for the maxVal parameter would work.

abhijith ( 2017-01-05 01:38:21 -0600 )edit

And if still small light fragments occur, apply some erosion and dilation to your problem!

StevenPuttemans ( 2017-01-05 06:31:29 -0600 )edit

It makes thinner or fat. But How does it support?

hoang anh tuan ( 2017-01-05 21:50:08 -0600 )edit

Because, if you have the first image, you see this ramdomn noise spots. Some of them might also have a very high value, and thus get through your threshold. Applying a erosion+dilation combination will remove those but keep your large blob!

StevenPuttemans ( 2017-01-06 02:30:40 -0600 )edit

I also think so @SetevenPuttemans

hosjiu ( 2017-10-23 03:44:23 -0600 )edit

add a comment

How to eliminate people's shadow or light noise in background subtraction? [closed]

Closed for the following reason the question is answered, right answer was accepted by hoang anh tuan
close date 2018-05-09 03:37:55.229262

1 answer

Comments

Links

Question Tools

Stats

Related questions

How to eliminate people's shadow or light noise in background subtraction? [closed] edit

Closed for the following reason the question is answered, right answer was accepted by hoang anh tuan close date 2018-05-09 03:37:55.229262

1 answer

Comments

Links

Question Tools

Stats

Related questions

How to eliminate people's shadow or light noise in background subtraction? [closed]

Closed for the following reason the question is answered, right answer was accepted by hoang anh tuan
close date 2018-05-09 03:37:55.229262