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Play-json seems to be the only "well-known" to use macros for generating typeclasses, which suggests that other important ones ( Json4s, Spray-Json) have not been improved since a long time.
In particular for Spray-Json, an open ticket of more than 3 years ago propose this improvement (https://github.com/spray/spray-json/issues/59) and while the feature is available in some of the community contrib, it has never been merged in the library.
Compile-time safety seems an obvious feature that any mature library who is still developed should have. What is the current state of development of the Scala libraries for handling Json?
There is no need to use macros for this, shapeless offers everything you need, e.g. https://github.com/fommil/spray-json-shapeless
there isn't a language lib for dealing with json. Play-json is the library used in the Play framework, so it has some 'advantage' over the other.
Stil, Circe and argonaut are really nice as far as I've seen.
I remember to have seen another few, but without most of the features these 3 provide.
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I am using Node.js...
Personally, I'm not a fan of SQL. What I do like is JSON, and I would like to be able to store my server data as JSON.
Even though it's possible to just JSON.parse and .stringify the process, I get the impression that doing this is a bad idea for large-scale applications.
Also, it would be nice if the database library could be just a library, and not a server like with MySQL.
Any suggestions on where to find said library would be much appreciated.
Availability of said library on NPM would be brilliant.
I use low db befor for small nodejs projects. Its easy to use. See documentation.
Have fun.
https://www.npmjs.com/package/lowdb
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Has anybody seen a resource covering specifically the use of machine vision for locating a human in a room, including cases where they may be partially obscured? I know about OpenCV and other machine vision packages, but I'm looking for a paper/library/code example that focuses solidly on identifying a human in a room; something that is readily integrated into code rather than being a rough idea that would require weeks or months of tweaking or enhancing to do a reasonable job of succeeding at the task. I'd prefer something that does not require binocular vision and can work with a single camera.
First: you should read this about human detection. Then you can find/use opencv code implementing the training step of this kind of detector. You will need to access to a database for training like INRIA Person dataset.
Second: if you need to handle partial obstruction, you may need to implement a human body tracker that can handle this problem. Particle filter could do the work.
If you have problems with implementation feel free to ask more specific questions.
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Good evening,
I'm working on a project with Kinect and I need to perform a gender-recognition using the voice information caught by the microphone of the sensor.
The recognition could also be text-based, i.e. the sentence said by the user could always be the same. I "just" need the binary answer male/female.
I've checked the quite popular open-source Sphinx but I can't understand if it could be used for my needs.
Any idea of what I could use?
Thanks in advance.
For sake of completeness, finally I solved the recognition task without analyzing the voice input.
Gender can be detected with an acceptable precision also by learning and then classifying visual biometric traits. I used speech recognition only as "interface" to activate the demo.
There are several ways to achieve this. You can track pitch (lower pitch values will be male, otherwise female). Or try to build a GMM (Sphinx cannot do this, but HTK can), with one model for male, other for female and another to children.
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I want to develop a simple web based resource reservation system using TCL/TK.
Please let me know some good tutorials or links to start with.
Also some good examples please.
Thanks,
Ramya
OpenACS has a room reservation module included. OpenACS is written in TCL. There are tutorials available here.
Note that Tk is a library to program GUIs; it's not a part of Tcl which is a language (and its reference implementation).
But there is a project which provides for programming web presentation layer in a way resembling programming GUIs with Tk—it's called Æjaks.
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I've seen it used a couple places:
http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/
http://developer.yahoo.com/flash/astra-flash/classreference/
Is this just a coincidence or is it somewhere I can grab? I'd love to use it for a new project I'm working on.
Thanks!
Take a look at asdoc. It's what the documentation is automatically generated with.
The most used standard for documenting ActionScript is javadoc, which is a pool of tags to comment your code. Theese information is extracted and turned into some sort of documentation, eg html pages.
To extract theese information there is a number of tools available. ASDoc is a command line tool. Another tool is Ortelius, that comes with a simple GUI that might be a little less "scary" for GUI junkies like me.