Is there a device like barcode reader which detect physical objects with webcam or something like that? I am using a barcode reader for a supermarket and my barcode reader can't read some of the barcodes. My barcode reader is fine, the problem is with my stuffs' barcodes. Is there a hardware or even software to detect the whole objects for me?
thanx in advance
Take a look at SnapTell. You can take a picture of an object, and they can find a match in a database. It's pretty amazing. It's all proprietary, but maybe they'll license their service.
Object recognition is a very complex field. Although what youa re looking this is possible i doubt if they are commercially available. If even if it were available it would be really expensive..
There is a commercial product available that is built to look underneath shopping carts and identify the merchandise by sight. It's called LaneHawk and is made by Evolution Robotics.
Related
I'm working on a sound installation for a college project in which a selection of objects can be placed in a basin with each one triggering a sound on entry, so the sounds accumulate with more objects allowing users to make their own 'mix'
I figured RFID tagging would probably be the best way to go for this, so a reader at the bottom of the basin senses nearby objects. The main problem I have is that I don't know how to trigger multiple tags at the same time with one reader.
I planned to use a raspberry pi to power an NFC reader, connected to a midi shield that would separate the value of each tag into different midi channels?
Was just wondering whether this was an appropriate route to go down, and if anyone has any other ideas? I don't Any suggestions would be hugely appreciated, the technical aspects of this project are really very new to me, and I'm not sure where to begin.
Thank you very much
Hy guys. At school we use badge for mark who is present, for my exam i want to upgrade that system.
I would like to create a face recognition system, basically i would like to set a raspberry with camera over the doors, like that, when students pass the door will be automatically marked as present.
I know OpenBR but i didn't understand if i can use it for my project, and i have some issues with it, i can't install it, it return me an error when i test it.
I ask you if you know if OpenBR can do the trick for me (you have to know that we are a lot at school), or if there are some other technologies that i can use.
You could look at using opencv to train an object detector to look for the badge:
http://docs.opencv.org/2.4/doc/user_guide/ug_traincascade.html
https://www.youtube.com/watch?v=WEzm7L5zoZE
If each of the badges have some unique identifier for the students, you could then analyse the identifier to take attendance.
Identifying the badge / face would be the "easy" part. Identifying the student would be the hard part!
Identifying people from photos is tricky, and I would estimate that Facebook has spent millions on this problem.
Here are a couple of links that may be useful
http://scikit-learn.sourceforge.net/0.6/auto_examples/applications/plot_face_recognition.html
OpenCV identify person with face detection
You use Raspberry Pi for your project, so
Software:
1.OpenCV-Python is a very good choice.
2. SimpleCV is more simple to use but less power than OpenCV. It's still ok for your purpose.
Hardware:
You also need to be aware of hardware, using USB Webcam is not a good choice because of slow speed.
Module camera is better because it uses serial interface to transfer data.
Do you know if there are unchangeable EXIF datas ?
In my case i want to know the real date of creation of a jpeg image. So I thought the EXIF's datas was the best way but I realized that with a software like XnView you can change it. So there is any way i can now the real date of the creation of an image ?
In another hand, is it possible to know if a EXIF datas has been modified ?
Thx fo all,
And sorry for my bad english
Have a good day !
:)
In principle, it is not possible to be sure the data hasn't been edited, although it may take a great deal of skill to do so indetectably. Some of the major camera makers (Canon and Nikon, possibly others) offer an "image authentication" feature in their pro model cameras which is designed to make it impossible to modify the image after it has been taken. They do this for the benefit of people doing legal work - evidence shots and the like. To use this, you have to switch it on (via the camera settings) before you take the picture. Even with these though, it is still possible to alter the data: both the Canon and Nikon authentication systems have been cracked (presumably with considerable difficulty).
As for normal pictures, yes, these are very easy to alter. However many (most?) programs which can edit EXIF data leave their own signs. For example, Adobe Photoshop always adds its own name somewhere in the EXIF, apparently whether you want it to or not. You can see this with many different EXIF viewers, especially with the more advanced ones like PhotoME. (Which, sadly, is no longer maintained.)
Short answer: yes, it is always possible to exit EXIF, and almost always possible to do it indetectably, but it may requite the right tools and quite a lot of skill. You can't ever be certain it has not been done.
I am working on a project where biometric system is used to secure the system. We are planning to use human voice to secure the system.
Idea is to allow the person to say some words or sentences and system will store that voice in digital format. Next time person wants to enter the system, he/she has to speak some words which may or may not be different from the words used earlier.
We don't want to match words but want to match voice frequency.
I have read some research papers regarding this system but those papers don't have any implementation details.
So just want to know whether there is any software/API which can convert analog voice into digital format and will also tell us the frequency of voice.
Until now I was working on normal web based applications so I know normal APIs and platforms like Java EE, C#, etc but I don't have any experience about this kind of application.
Please enlighten !!!
http://www.loquendo.com/en/products/speaker-verification/
http://www.nuance.com/for-business/by-solution/contact-center-customer-care/cccc-solutions-services/verifier/index.htm
(two links removed due to reported virus content)
http://www.persay.com/products.asp
This is as good a starting point as any : http://marsyas.info/
It's a open source software framework for audio processing. They've listed a bunch of projects that have used their framework in various ways so you could probably draw inspiration from it.
http://marsyas.info/about/projects. The Telligence project in particular seems the closest to your needs as it it was used to gender classify audio : http://marsyas.info/about/projects#5Teligence
There are two steps on a project like this one I believe:
First step would be to record the voice from an analog input into digital format (let's assume wav-pcm). For this you can use DirectShow API in C#, or standard Wav-In as in this project: http://www.codeproject.com/KB/audio-video/cswavrec.aspx. You may consider compressing your audio files later on, there are many options for this, in Windows you may consider Windows Media Format SDK to avoid licensing issues with other formats.
Second step is to build or use a voice recognition framework, if you want to build a recognition framework you will probably need to define a set of "features" for your sound fragments and select+implement a recognition algorithm. There are many aproaches available for this, IEEE amd ACM.org websties are usually good sources. If you want to use an existing framework you may want to consider Nuance Recognizer (commercial) or http://cmusphinx.sourceforge.net (open source).
Hope this helps.
I want to make a program that takes recorded speech and transforms it so it sounds like it's coming from a Texas TI-99. Do you have any good ideas and resources for how to go about that?
Most of those old speech synthesizers were build directly in-chip. Perhaps you could find a synthesizer that sounds like the chip, but if you really want the original sound, you would either have to simulate the chip (I don't know if it's a simple matter, perhaps the chip internals aren't published).
I only know because I burnt out a number of the Radio Shack speech synthesizer ICs before I managed to get a SP0256-AL2 working.
If you're more of a do-it yourself type guy, you need to find out which IC actually drove the speech synthesis in a TI-99, and then build the chip up on a bread board. That's what I was trying to do back then, and I managed to get the chip to speak, but lost patience after I fried my third chip due to a mis-wiring issue when I attempted to attach it to my PC's parallel port. I think this was the book I was using back then, but there's no cover art featured so it's hard to know for sure.
If you are familiar with how to use ROM images, there seems to be a gentleman that has managed to refeverse engineer the ROM image out of a SP0256-AL2. Look here for the image and the incredible granted permission to do the work and distribute the results.
You could start with open source that does something similar: Adding Robotic/Vocoder effect to your song using Audacity