# 2.5 Conclusion and future work

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## Scale-invariant feature transform

After performing SIFT on a number of images and finding the location of the key points on those images, we realized that although SIFT recognizes the sharp corners and curvatures very well, it would not recognize key point along straight lines. Looking back at the SIFT algorithm, we found out that this is because straight lines are not scale and rotational invariant as compared to corners. Since SIFT focuses on the robustness of key points and on the features of an image, straight lines do not qualify as features.

Since, our goal is to identify squares in an image mainly comprised of geometric figures we are mostly dealing with straight lines. Hence, SIFT would not be a suitable algorithm for us to locate the edges in the image. We would need to resort to other methods. Due to time constraints we turned to Matlab edge Functions.

## Hough transform

The Hough Transform correctly identified the squares in an image but was computationally expensive. Every single pixel in the image had to be looked at. Also if enough noise was added that an edge was lost the Hough transform ceased to work at all. Overall the Hough Transform is a more robust approach because it can be generalized to even more complex situations where the Moment of Inertia method cannot.

## Moment of inertia

The Moment of Inertia method proved to be extremely rudimentary. It worked on simple images where the shapes had very different Moments of Inertia and the shapes did not overlap. But if the shapes overlapped the boundaries were lost and the shapes were not identified correctly. Also, if two shapes had similar Moments of Inertia the system would give a false positive. Obviously Moment of Inertia is not a method that can stand on its own. However, it only gives false positives. It won't accidentally mask out an actual result. Due to that and the fact that it is computationally very cheap, it could be used as a preprocessor for a more computationally expensive algorithm.

## Future works

Continuing on from here, we want to optimize our implementations. After successfully improving the speed of our code we would want to solve the issue our Moment of Inertia method has with overlapping images. This could be solved by starting from the smallest shape and moving outward. Finally, we would reorganize our system to match the following design:

Implementing this design would save computation time in the Hough transform. The Moment of Inertia would mask out shapes that were clearly not correct which would reduce the number of Hough Peaks and reduce the number of calculations. After implementing this improved system we would want to create our own way of obtaining the edges of our images besides Matlab.

I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
what does nano mean?
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?
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
it is a goid question and i want to know the answer as well
Maciej
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
how did you get the value of 2000N.What calculations are needed to arrive at it
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