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I'm seeking a library, technique or advice on how to read an EAN-13 barcode from an image (including ISBN,and ISSN encodings).
The image would come from a mobile phone or webcam, so resolution may be quite poor and not well aligned.
I'm specifically interested in something that could be used from ruby on rails, but answers for other languages are welcome. Open Source solutions preferred.
Leading solutions to date:
ZBar (previously known as Zebra - h/t #bgbg, #Natim) - implemented in C with interfaces for Python, Perl, and C++
ZXing (h/t #codr) - implemented in Java (J2SE and Android) with other modules/ports in varying states of development (JavaME, C#, C++, JRuby, RIM, iPhone/Objective C)
The zebra barcode reader (http://zebra.sourceforge.net/) is a small, layered bar code scanning and decoding library implemented in C (C++ wrappers are also provided). It supports many popular symbologies (types of barcodes), including EAN-13. However, I'm not aware about any Ruby bindings. The library is available under the GPL
This project might be what you're looking for: ZXing
You might want to try this if it's to allow your site's visitors to scan stuff, I think it's embeddable in your own site, but I've never used it : http://en.barcodepedia.com/
We use the Softek library.
Very pleased with the results.
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As an old C/C++, C#, Java, JS, PHP programer, I just couldn't get used to Objective-C. The reasons are obvious. I want to continue developing iOS applications and continue using Xcode storyboards. But I seriously need an alternative to Objective-C, is there any powerful tool or framework alternatives that could help me get away from Objective-C?
By powerful alternative, I mean useful enough to use most of the device methods/functions easily and has a lot of online resources, tutorials, examples on it.
I would very, very strongly recommend that you get a good Objective-C book, or work through the Stanford iOS development course on iTunes U. Without Objective-C, you will get a lot less help with other languages, you won't be able to understand code samples, you won't understand the iOS documentation.
Try http://xamarin.com/ios - this allows you to write in C#. Personally I've used all those languages as well (other than C#) but actually prefer Objective-C.
You might want to consider RubyMotion - http://www.rubymotion.com
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I want to make an offline iPhone application that can grab text from a picture. Can anyone suggest the best library which I can use. I heard ZBAR and ZXING can be used only for barcode reading. Is there any other OCR Libraries for iOS to read text from images. I expect your valuable suggestions as soon as possible.
Thanks in Advance..!
Currenlty offline OCR is possible only with Tesseract
You can get source code here
Here is the good tutorial about how to use Tesseract
Also you can perform OCR on multiple language. You can dowlnoad other language trained data here
You might want to look here. They offer a large variation of language they can detect and i heard only the best from their framework.
You can also test the framework live: live demo
Unfortunately i think it is very expensive to use this framework. But if you want an A1(all my Breaking Bad fans ;-)) framework this might be your best shot.
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The issue I'm having is I can't find an actively developed open-source AR library for iOS.
I don't need 3D support or maker based recognition. Just the ability to place icons/labels like Yelp's famous monocle feature.
My goal is to integrate AR into my app so that users can view POI's near their location. My app already has a map view doing this and I thought it would be cool to use an AR view too.
I've looked at:
Mixare (iOS version not very smooth, is buggy, and code is chaotic. Also does not seem to be supported anymore, there's not been an update for 5 months).
ARKit (not been updated in 4 years and has a warning about it being a bit rough).
Anyone had an experience or know of a good all round library that I can drop into my application?
Alternatively if anyone can recommend any books or tutorials on how to write your own that would be appreciated.
For a simple integration you can use the Junaio plugin or the Wikitude SDK. They are not open-source solution but sufficient if you are not interested to modify the layout, representation or internal computation for transforming POIs into an AR view.
There is an example for GPS-based AR from the Professional iOS programming Book available from github, as well as PanicAR (just search on github.com).
Finally Apples provides a basic implementation in the iOS developer library: look for pARK.
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I was looking around for an OCR library - optimally it would be open-source - that I could use on some Arabic pdfs. Googling it didn't result in anything useful. I was wondering if anyone knows a related OCR library or even one that works on related languages (Farsi and Urdu could be relevant) that Arabic support could be added to.
Any general suggestions on how to approach this will be appreciated.
Starting with Version 3.01 of Tessaract-ocr it now supports Arabic
I know nothing about Arabic OCR quality, but some intelligent Googling found Sakhr's Automatic Reader. It's commercial software.
Sorry. It's commercial, and quite expensive. Arabic is probably one of the hardest languages in the world to do OCR on -- I guess it takes a lot to motivate someone to do it.
The Arabic language is sophisticated when it comes to OCR because of the nature of the language and there is no free or commercial software that can get 100% accuracy.
This is from my personal experience but you can try IRISREadIRIS pro 14.
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What encryption algorithm is better to use?
client-Delphi, server-Python.
Recommend please simple algorithms and libraries ..
If you are looking for simple algorithms (not simple encryption) then two come to mind:
XTEA
RC4
Both are really simple and could be easily implemented in any language and both are very fast. XTEA is also secure. At least if you are not looking to protect national secrets :) I have an XTEA implementation for Delphi that works under newest delphi versions. Look here.
I also found a Python version: http://code.activestate.com/recipes/496737/
This question is far too open ended.
Your best bet for using the same library in both Delphi and Python is mcrypt. It contains a sizable cipher suite. I recommend AES / Rijndael for just about everything. It's a nice block cipher and is used almost everywhere.
You can also try the Delphi Encryption Compendium. It features the most popular algorithms and is quite easy to use due to it's OO layout.