How to identify free parking slots of a car park using image processing in java

[Chulaka Gunasekara]

Hi all,

       I'm doing a project in java which uses image processing, to
identify free parking slots of a car park. I'm new to image processing
and for the moment confused about the algorithm I should use to
identify the parking slots. Can somebody please help me... I don't
have any idea..


--
Chulaka Gunasekara
Dept. of Computer Science & Engineering
University of Moratuwa.
Sri Lanka.

[dscho]

Hi,

On Wed, 20 Jun 2007, Chulaka Gunasekara wrote:

>       I'm doing a project in java which uses image processing, to
> identify free parking slots of a car park. I'm new to image processing
> and for the moment confused about the algorithm I should use to
> identify the parking slots. Can somebody please help me... I don't
> have any idea..

That is a cool project! For starters, it would be good to provide example
images, so that people who have experience with image processing can
assess what kind of algorithm will give the best results...

Ciao,
Dscho

[Rotella, Anthony M. (GRC)[]]

Chulaka,

        One idea I can think of right now, is that if the cement/parking
lot is black, you might be able to draw lines across the rows of parked
cars, and try to pick out the drops in the plot profile arrays to count
the number of spots that don't have cars. Of course this won't work
perfectly, since some cars are black, and you'd have to figure out how
to deal with the spaces in between the cars that are also black, but it
may be an idea. Another idea is to convert the image to 8-bit greyscale
and threshold to count the number of cars, then subtract that from the
number of the available spots. Again though, black cars would be a
problem. Interesting project! I hope this might get you started.

Tony

>-----Original Message-----
>From: ImageJ Interest Group [mailto:[hidden email]] On
>Behalf Of Chulaka Gunasekara
>Sent: Wednesday, June 20, 2007 8:23 AM
>To: [hidden email]
>Subject: How to identify free parking slots of a car park
>using image processing in java
>
>Hi all,
>
>       I'm doing a project in java which uses image
>processing, to identify free parking slots of a car park. I'm
>new to image processing and for the moment confused about the
>algorithm I should use to identify the parking slots. Can
>somebody please help me... I don't have any idea..
>
>
>--
>Chulaka Gunasekara
>Dept. of Computer Science & Engineering
>University of Moratuwa.
>Sri Lanka.
>

[ctrueden]

Hi Chulaka,

Could you get a picture of the car park when it is empty, and do a
background comparison against that? You could try ImageJ's particle
analyzer on the subtracted image, setting the minimum size above a
certain threshold, with identified particles corresponding to cars or
other large objects.

-Curtis

On 6/20/07, Chulaka Gunasekara <[hidden email]> wrote:

> Hi all,
>
>        I'm doing a project in java which uses image processing, to
> identify free parking slots of a car park. I'm new to image processing
> and for the moment confused about the algorithm I should use to
> identify the parking slots. Can somebody please help me... I don't
> have any idea..
>
>
> --
> Chulaka Gunasekara
> Dept. of Computer Science & Engineering
> University of Moratuwa.
> Sri Lanka.
>

[Adam Hacking]

Chulaka

Are there any marks or numbers in the parking spots that may be covered by a parked car ? An idea like Curtis's except you look for that instead of the car. No visible mark, then the spot is filled.

Adam

Curtis Rueden <[hidden email]> wrote: Hi Chulaka,

Could you get a picture of the car park when it is empty, and do a
background comparison against that? You could try ImageJ's particle
analyzer on the subtracted image, setting the minimum size above a
certain threshold, with identified particles corresponding to cars or
other large objects.

-Curtis

On 6/20/07, Chulaka Gunasekara  wrote:

> Hi all,
>
>        I'm doing a project in java which uses image processing, to
> identify free parking slots of a car park. I'm new to image processing
> and for the moment confused about the algorithm I should use to
> identify the parking slots. Can somebody please help me... I don't
> have any idea..
>
>
> --
> Chulaka Gunasekara
> Dept. of Computer Science & Engineering
> University of Moratuwa.
> Sri Lanka.
>