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25 Nov 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

hello misael,
Thanks.
If you don't have pure background then you will end up with more and false keypoints. MK-RoD is prone to false SIFT keypoint matches. So simply, the algorithm will not work if you use background.

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25 Nov 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

misael

misael (view profile)

Hi Caglar, you have done a great work, I have a question. Why is it recommendable to use a pure black background? I mean, what happens with the algorithm and the keypoints if you donĀ“t have that background?

5
27 Apr 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Dhruv Patel

Excellent work Mr. Arslan.

I had a question regarding to your source code? Does it work with any images i have in database? can it be face, feature or any object detection?

Thank you.
Dhruv Patel

5
03 Apr 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Deepak

Deepak (view profile)

Brilliant work done

5
20 Mar 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

DHARMRAJ PRASAD

this code is not working with other input image. when we take other input image, we get error massage like described by Bipul and after this, if we take right image from input database than it show error.
sorry for english.....

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15 Mar 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Danis

Danis (view profile)

Sir Caglar Arslan,
you've used siftwin32.exe, what is the purpose of it.
And this code is very time consuming.
So, i am unable to make it into the real-time code.
There is no other easy code for student learning for same purpose?
Can you upload simple matlab code for ASL?

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11 Feb 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

vipul,
you have to activate and deactivate commented lines in order to switch between the images. CTRL-R is one of the shortcut keys.

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05 Feb 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

vipul khandare

dear sir when i execHGR file run only "input='Images/Inputs/sample/b_sample_green.jpg';" b output generaete but c,h,i,o .........output is not generate.....how can other output generate???????

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02 Feb 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

karan patel

how can hand gesture recognition? please give me useful code for this topics.

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26 Jan 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

it looks like your current working directory is not set to the program's destination. you have to change your folder.

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25 Jan 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

vipul khandare

Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition

this file can exucute in matlab 13a ???????

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25 Jan 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

vipul khandare

this program is not execute execHGR.m
Hit F5
but shown following error

Error using imread (line 350)
File "Images/Inputs/sample/y_sample_green.jpg" does not exist.

Error in sift (line 25)
image = imread(imageFile);

Error in match (line 56)
[im2, des2, loc2] = sift(image2);

Error in formResults (line 18)
[match1,match2,cx1,cy1,cx2,cy2,num] = match(dataBase(Selecteds(i),:),
input, distRatio);

Error in hgr (line 64)
results=formResults(input,distRatio,threshold,Selecteds);

Error in execHGR (line 35)
results=hgr(input);

pleas help me & explain how execute this program step by step

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24 Jan 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

vipul khandare,
Just execute execHGR.m

Hit F5 to run it!

and please read the freaking manual!

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24 Jan 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

vipul khandare,
The code is working for years.

JUST FOLLOW THE INSTRUCTIONS GIVEN IN README.TXT.

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23 Jan 2014 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

vipul khandare

THIS CODE IS NOTE WORKING

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22 Aug 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

nausheen

how can i see keypoints in my matlab figure window

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29 Jun 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

sammy

sammy (view profile)

Good Documentation.

5
20 Jun 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

sammy

sammy (view profile)

Good Documentation.

5
03 May 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

kaushalya jayamini

5
18 Apr 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

siya

siya (view profile)

hi,i am workin on the same project.we r trying to do it in real time.the results of sift are not satisfactory.suggest some way to improve it

5
13 Apr 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Pavel M.

I recently found how the NFA computed in the ASIFT code:

float nfa = orsa((w1+w2)/2, (h1+h2)/2, match_coor, index, t_value_orsa, verb_value_orsa, n_flag_value_orsa, mode_value_orsa, stop_value_orsa);

Any feedback whether that computation is correct?
Thanks

5
13 Apr 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Hello Heba,
It seem that the link is not working.

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12 Apr 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Heba El Kholy

Hello Caglar, I uploaded my edits here: http://www.mathworks.com/matlabcentral/fileexchange/36154 sorry for the VERY late reply

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11 Apr 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Hey Bhavik,
If I create something useful by any chance I will directly put it here.

Best wishes and good luck

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11 Apr 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Bhavik Gandhi

Caglar Arslan

No problem.
For now I am going on with SIFT. Also, trying on ASIFT. Please let me know if you implement ASIFT would be greatly helpful.

Thanks & Regards.

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10 Apr 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Hello,
Sorry I couldn't write anything because of work.

@Bhavik > I do not have an ASIFT version currently. I started working on it a couple months ago but couldn't progress because of my professional duties. I hope I would find some spare time for this.

@kaushalya > It is not an NNS algorithm. But you can consider it as an Nearest Pattern Search. You can find the explanation inside the jpg files of the project and also inside the code comments.

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08 Apr 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

kaushalya jayamini

Does MKRoDAlgorithm has any relationship to NNS or is it your own invention? I need an explanation on this algorithm.

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10 Mar 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Bhavik Gandhi

Hi Caglar, I tried using demo_ASIFT.exe

It would be very helpful if you provide your implementation of this for Hand Gesture Recognition. Because in this .exe file all the parameters are calculated and matching is done withinin itself. There is no place where I can extract the features of the image and store it.
Also do we have to use Mk-Rod algorithm or ASIFT matching is enough ??

I am trying to break the C++ code and use it for storing the features of database images.

If you provide your implementation, I can take some ideas from it and make it work faster.

Thanks & Regards.

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09 Mar 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Bhavik Gandhi

Thanks a lot Caglar for useful guidance.
We are trying to implement it on realtime so time is a great concern for us.

Yes we are pre-calculating all the SIFT parameters for all database images and storing it in a .mat file and fetching the same data at runtime.

Thanks for the ASIFT link. I'll try it and let you know the progress.

Thanks a lot
Regards.

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09 Mar 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

If execution time is not your concern, you can increase the amount of database images. For example for each sign you can have 3 or 5 dataset images.(i.e. 3 "a" signs, 3 "b" signs and so on..) This will have a huge impact over the execution time but the accuracy will improve.
You have to modify the code in order to handle multiple dataset images per char.
You may calculate the mean of the validityRatio for every character set and base your decision on that.

I do not guarantee that this would work but in a logically sense you can eliminate the wrong detections.

Also pre-calculate the SIFT keypoints of the dataset images instead of calling at every recognition request.

In addition pre-calculate the SIFT of input image in order to reduce the execution.

Also Bhavik note that, false matches could occur in SIFT level matching(That is the main cause of having wrong detections). Instead of SIFT, try to embed a SIFT variant, ASIFT. I tested ASIFT with hand gesture images about a month ago and observed that it provides better matching accuracy and lesser amount of false matching. I highly recommend you to replace SIFT with ASIFT. Try it on http://www.cmap.polytechnique.fr/~yu/research/ASIFT/demo.html

They also provide the source codes on the website. The sources are in C++ but the application executable has MATLAB based wrapper( a .m file that calls an executable, like I did in my algorithm(siftWin32.exe)

Download it from http://www.ipol.im/pub/algo/my_affine_sift/demo_ASIFT_Win.zip

Bhavik I strongly advise you to embed the ASIFT. Please let me know about the progress.

Best wishes,

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09 Mar 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Bhavik Gandhi

Thanks Caglar for the guidance.

I am facing another problem, it would be great help if you guide me on this.

I am trying to compare all the 26 alphabets and also 10 digits 0-9
Sometimes the alphabet is correctly recognized but many times wrong or similar sign language is decoded giving wrong output result. Please guide me as what all changes are needed. I tried changing the Mk-Rod threshold and distratio of sift, but still I get erroneous result.
Please guide me , what parameters to change or any additional check required.

Thanks & Regards
Bhavik

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07 Mar 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Hello Bhavik,
No it is not necessary, the point pattern for each image pair is independent of each other thus you do not need to parametrize the image sizes.
But note that having a pure background is not the only necessity. Details of the hand is also important. Higher resolution would return better results.

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07 Mar 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Bhavik Gandhi

Hi caglar,
Just another doubt.
Is it necessary to have all the images of same size in database ?
like for example in your database all the images are of size 400x300
also in the inputs the size is same.

In our database, we are having all images of different size only having it's region of interest with black background.
Will this cause any problem in matching ?

Thanks and Regards,
Bhavik

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01 Mar 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Himadri, thank you very much.
You can do whatever you want to this project under the BSD license.
At the top of the page you can find the BSD License
content.
Best wishes,

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28 Feb 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Himadri Mohan

Hi.. I just went through your project and i think you have done a great job..
i need to know if you can please let me use the code of this project and modify it as well..

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24 Feb 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

@Bhavik I strongly recommend you to investigate David Lowe's SIFT paper. You will find your answers there.

@sachin no problem. the siftwin32 is the Lowe's C implementation of SIFT. That executable generates the SIFT keypoints for input images. btw sorry all of the documentation is embedded as programming comments inside the project. And also there are a bunch of explanatory images about the algorithm. Good luck.

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23 Feb 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

sachin

sachin (view profile)

@caglar sorry to disturb you sir,
can you please explain about siftwwin32?
and if you have any documents related to your project please send it sachin.naik055@gmail.com.

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12 Feb 2012 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Bhavik Gandhi

Heyy Caglar

Was going through your code, in that in Match function you have called an .exe file for des, locs and img
I cannot get as what data does des and locs store?

also, i think for matching purpose you have used the following code, I cannot get it, as how the matching is done?

for i = 1 : size(des1,1)
dotprods = des1(i,:) * des2t; % Computes vector of dot products
[vals,indx] = sort(acos(dotprods)); % Take inverse cosine and sort results

% Check if nearest neighbor has angle less than distRatio times 2nd.
if (vals(1) < distRatio * vals(2))
myMatch(i) = indx(1);
else
myMatch(i) = 0;
end
end

j=1;
for i = 1: size(des1,1)
if (myMatch(i) > 0)
%plot(loc1(i,2),loc1(i,1),'ro');
match1(j,1)=loc1(i,1);
match1(j,2)=loc1(i,2);
match2(j,1)=loc2(myMatch(i),1);
match2(j,2)=loc2(myMatch(i),2);
j=j+1;
end
end

num = sum(myMatch > 0);

please let us know as to how the matching is done by having the data in des, locs and img... it will be very helpful for us developing our own method.

Thanks a lot.

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20 Nov 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Hello Bhavik,
Are you talking about what to do after step 6?
Note that, the tutorial site is all about the implementaton of the SIFT algorithm.
As I said earlier, SIFT is the main keypoint generator for my algorithm. Without having a properly working SIFT, you can't match any images.
Please investigate the documentation(the program comments, explanatory algorithm images) of my code(which I believe it is pretty good documented) if you would like to implement a variant of my algorithm.

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20 Nov 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Bhavik Gandhi

Hi Caglar,

we are following the same blog:
http://www.aishack.in/2010/05/sift-scale-invariant-feature-transform/

for tutorial and algorithm flow. We are writing the code in MATLAB using it's Image processing toolbox functions.

we are reached till step 5 for assigning orientation fr pixels around the keypoints to all the database images. We are stuck up in next step, as in what to do after tat ? and how to compare the database images with the input images. Please help us understand the last step.

or can you please mail any documents if you have on gandhibhavik.89@gmail.com

Thanks

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16 Nov 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Hello Milind,
Thanks for your compliments.
It is so nice to hear from you again.
It is also so great to hear about your progress.
I really wondered what kind of modifications you did to the algorithm.
Also note that, I was planning to publish this algorithm as a conference paper. I would appreciate if you can contribute and share your findings. So that you can be one a co-author for this algorithm.
If you are interested send me a private message.
I am waiting for your reply.
Best,

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16 Nov 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Milind Furia

Hey Caglar, you are welcome. It's nice to see you helping out others here.
Last summer when I commented on this thread I had actually made some changes with some of your algorithms and managed to increase the pattern matching efficiency to more than 95%.
If you would like then I would like to post the same here. Also I changed the method of input for the images; as in you can have different methods for inputs.

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15 Nov 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Hello Kok Hong again,
I would suggest you to investigate the match function.
%[match1,match2,cx1,cy1,cx2,cy2,num] = match(image1, image2, distRatio)

The returning value "num" keeps the matched number of keypoints.
"num" would resolve this issue.
If it doesn't please inform me. So that I can correct it in the next revision.

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07 Nov 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Kok Hong

thx caglar.
i have another question.
i used ur code for real time sign language algorithm. i made the background of every image with black colour. and if there is nothing on the image captured(only black colour background) there is an error like below:
??? Attempted to access vals(1); index out of bounds because numel(vals)=0.

Error in ==> match at 85
if (vals(1) < distRatio * vals(2)) %?????????????

Error in ==> formResults at 18
[match1,match2,cx1,cy1,cx2,cy2,num] = match(dataBase(Selecteds(i),:), input,
distRatio);

Error in ==> hgr at 77
results=formResults(input,distRatio,threshold,Selecteds);

do u know how to solve it?? thx in advanced. im appreciate of ur help.

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28 Oct 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

Hello Bhavik,
Nice to hear from you again.
It is also unclear to me about the .pgm related implementation.
This .exe is downloaded from http://www.cs.ubc.ca/~lowe/keypoints/ .
For your SIFT related questions, I would definitely recommend the following site:
http://www.aishack.in/2010/05/sift-scale-invariant-feature-transform/
I hope everything is going well for you.
Take care,

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24 Oct 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Bhavik Gandhi

Hi Caglar, this is me again

Got some doubt about the siftwin32 .exe file. In your program you have called this file to give sift key-points if am not wrong. Just want to know, what this .exe file actually does? How it calculates the key points and it's algorithm and also what data is been stored in tmp.pgm file ?

Thanks

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24 Oct 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

hello Kok Hong,
As far as I can remember, the pgm file is a process file generated by SIFT. Since the SIFT function is called outside MATLAB, you can't have appropriate updates onto core SIFT function unless you change it with a MATLAB implementation.

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23 Oct 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Kok Hong

hi caglar, im the beginner. can i ask how to open pgm image file that is using in this code?

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20 Oct 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

Caglar Arslan

Caglar Arslan (view profile)

hello divya, thanks for your compliments.
What I would suggest you is to find the palm of the hand. Since you can track the fingertips, you can create a database of possible hand orientations (palm, fingertips). Also it would be great to detect each fingertip separately. (i.e. index finger, middle finger, thumb, ....). If you can accomplish this, it would become easier to match the orientations of the hand with the dataset.
Sorry, I have no experience with feature extraction using PCA for the sign language. But I would suggest you to read some papers regarding PCA based feature extraction for face recognition.
Good luck with your thesis.

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19 Oct 2011 Point Pattern Matching Algorithm for Hand Gesture / American Sign Language (ASL) Recognition A demonstration of American Sign Language recognition by using a Point Pattern Matching Algorithm. Author: Caglar Arslan

Caglar Arslan (view profile)

divya

divya (view profile)

hello Caglar Arslan. Thannx for d project.you have done a great job.i am also doing my thesis on sign language recognition. i have segmented the hand and done with fingertips detection and tracking.i want to do feature extraction using PCA(principal component analysis). please suggest me which features should i take to match signs.

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