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Result of experiments and future work that can be done.

Lpr challenges

While our program works efficiently for a subset of license plates, there are still various challenges that we must overcome to obtain a more robust program. These include: differences between different states' license plates, trouble characters such as "B" and "8", and environmental adaptation for a real world application. In this module, we will suggest potential avenues to pursue in order to address these challenges.

The sift algorithm

The Scale Invariant Feature Transform is an important algorithm that could help improve the robustness of our program, and allow it to be expanded to new applications and environments. This algorithm can identify unique features on specific license plates, and thus be used to rescale and reorient images that are taken from a different angle. SIFT can also help the program identify different types of license plates through the different pictures and fonts between different states' license plates. Because this difference could reduce accuracy, by using SIFT a larger dictionary can be created that will be accessed when SIFT identifies a unique type of license plate.

With SIFT, our program would be able to locate and isolate a license plate from an image of an entire car and parking garage by locating target features indicative of the specific type of plate. Therefore, even if an image has many other features outside of the license plate and is captured at an abnormal angle or position, SIFT could return a license plate image that is normally aligned and identify which dictionary to access based on the type of plate.

Probabilistic model

The matched filter program returns very similar correlation results for characters such as 'B' '6' '8' and 'D' as shown in Figure 1, which could lead to a incorrect identification. To address this issue, we can explore other means of representing or identifying each letter. One option could be running the matched filter program on different parts of characters for those with close correlation values. For example, while the whole image of 6 and 8 may look similar, the top halves of the two characters are more distinct. This could offer a second level of comparison for finer detection. Further work can also be done to create a model that utilizes probability and machine learning to choose the correct match. Through experimentation with large data sets, this method could offer a more accurate approach beyond our current deterministic model that simply chooses the highest correlation value.

Bcorr
Similar correlation values found for template characters 6, 8, B, and D when testing position one (character B).

Environmental adaptation

Certain hardware and environmental adjustments can be made to maintain accuracy. Cameras should be positioned and angled for a straight, front shot of the license plate for cars of all different sizes. Lighting should be normalized by placing a light close to the location of where the license plate will be so that the plate can still be viewed clearly at night time.

Questions & Answers

Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, License plate recognition matched filter technique. OpenStax CNX. Dec 18, 2013 Download for free at http://cnx.org/content/col11601/1.1
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