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  • How to do motion tracking of a object using video

    - by Niroshan
    Could someone direct me to a tutorial or guide me how to track motion of a object moving with 6 DOF. I am planing to use a video stream of a moving toy car. I want to calculate displacement and rotation angle of the toy car. I came across some research papers but couldn't find any libraries to the job. Is there a way to do this using OpenCV or Matlab or some other freely available software? Thank you

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  • Get previous object in selectors chain

    - by Idsa
    I have the following jQuery calls chain: $(someSelector).nextUntil(".specialClass").addClass(classBasedSomeSelectorObject) I need to addClass that's value is based on the object which was returned by someSelector. Is there any way to implement it?

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  • how to generate String difference vectors?

    - by SWKK
    Hi Guys, a bit of a vague question but I am looking for pointers as to how can I generate String diff vectors in C++. The scenario is such that given a paragraph I want to store the various differences(Edit, cut copy paste etc.) it goes through in a draft mode to review Audit history. Any hints in this regard will be really appreciated.

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  • Check if Ruby object is a Boolean

    - by viatropos
    Can't seem to find how to check if an object is a boolean easily. Is there something like this in Ruby? true.is_a?(Boolean) false.is_a?(Boolean) Right now I'm doing this and would like to shorten it: some_var = rand(1) == 1 ? true : false (some_var.is_a?(TrueClass) || some_var.is_a?(FalseClass))

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  • Django | capture sub domain as a string

    - by MMRUser
    How do I capture a part of sub-domain name and get that name as a string in my views through a request. ex: user.domain.com developer.domain.com I want to capture the user part of this domain name through a request (lets say when the first time user hits the page). Thanks.

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  • Encode and Decode a string in c#

    - by Jibu P C
    Hii, I had a requirement of encode a string provided to a unreadable format and also have to decode after certain action performed. I have tried 'Base64' encoding. But this is not a secure way. I need some other solutions. Give some help regarding the above context.

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  • How to relink existing shared library with extra object file

    - by awy
    I have existing Linux shared object file (shared library) which has been stripped. I want to produce a new version of the library with some additional functions included. I had hoped that something like the following would work, but does not: ld -o newlib.so newfuncs.o --whole-archive existinglib.so I do not have the source to the existing library. I could get it but getting a full build environment with the necessary dependencies in place would be a lot of effort for what seems like a simple problem.

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  • php: regex remove bracket in string

    - by apis17
    hi, similiar like this example, http://stackoverflow.com/questions/1336672/php-remove-brackets-contents-from-a-string i have no idea to replace $str = '(ABC)some text' into $str = 'ABC'; currently use $str = preg_replace('/(.)/','',$str); but not works. how to fix this?

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  • preg_match_all to parse an xml-like attribute string

    - by Rob
    I have a string like so: option_alpha="value" option_beta="some other value" option_gamma="X" ...etc. I'm using this to parse them into name & value pairs: preg_match_all("/([a-z0-9_]+)\s*=\s*[\"\'](.+?)[\"\']/is", $var_string, $matches) Which works fine, unless it encounters an empty attribute value: option_alpha="value" option_beta="" option_gamma="X" What have I done wrong in my regex?

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  • Instantiate a model when the kind of model needed is represented as a string argument

    - by indiehacker
    My input data is a string representing the kind of datastore model I want to make. In python, I am using the eval() function to instantiate the model (below code), but this seems overly complex so I was wondering if there is a simpler way people normally do this? >>>model_kind="TextPixels" >>>key_name_eval="key_name" >>>key_name="key_name" >>>kwargs {'lat': [0, 1, 2, 3], 'stringText': 'boris,ted', 'lon': [0, 1, 2, 8], 'zooms': [0, 10]} >>>obj=eval( model_type + '(key_name='+tester+ ',**kwargs )' ) >>>obj <datamodel.TextPixels object at 0xed8808c>

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  • C# Get Keys from a Dictionary<string, Stream>

    - by alex
    Suppose I have a Dictionary like so: Dictionary<string, Stream> How can I get a list (or IEnumerable or whatever) of JUST the Keys from this dictionary? Is this possible? I could enumerate the dictionary, and extract the keys one by one, but I was hoping to avoid this. In my instance, the Dictionary contains a list of filenames (file1.doc, filex.bmp etc...) and the stream content of the file from another part of the application.

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  • javascript instanceof get type from string name

    - by dcp
    Let's say I have this (assume the name variable is "receiver"): if (!(receiver instanceof com.HTMLReceiver)) { throw new com.IllegalArgumentException( name + " is not an instance of com.HTMLReceiver."); } I'd like to factor this code out into a common method so I could call it like this: Helper.checkInstance(receiver, "com.HTMLReceiver"); But I don't know of a way to convert the com.HTMLReceiver from a string to its actual type so I can use instanceof on it. Is there a way?

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  • gae error:AttributeError: 'NoneType' object has no attribute 'user_is_member'

    - by zjm1126
    class Thread(db.Model): members = db.StringListProperty() def user_is_member(self, user): return str(user) in self.members and thread = Thread.get(db.Key.from_path('Thread', int(id))) is_member = thread.user_is_member(user) but the error is : Traceback (most recent call last): File "D:\Program Files\Google\google_appengine\google\appengine\ext\webapp\__init__.py", line 511, in __call__ handler.get(*groups) File "D:\Program Files\Google\google_appengine\google\appengine\ext\webapp\util.py", line 62, in check_login handler_method(self, *args) File "D:\zjm_code\forum_blog_gae\main.py", line 222, in get is_member = thread.user_is_member(user) AttributeError: 'NoneType' object has no attribute 'user_is_member' why ? thanks

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  • Using RegEx to Identify parts of a Database Connection String

    - by David_Jarrett
    I'm trying to get to grips with regular expressions: I have a database connection string and I'd like to use a regular expression to identify specific Keys and Values within it. For example server=foo;database=bar;uid=foo;pwd=bar I'd like something to return "database=bar;" using the 'database' key to identify it, ideally it would be case insensitive. I can do this using normal code, but I think that this is exactly the sort of thing for which regular expressions were designed.

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  • find substrings inside string

    - by senzacionale
    How can i find substrings inside string and then remember and delete it when i found it. EXAMPLE: select * from (select a.iid_organizacijske_enote, a.sifra_organizacijske_enote "Sifra OE", a.naziv_organizacijske_enote "Naziv OE", a.tip_organizacijske_enote "Tip OE" I would like to get all word inside " ", so Sifra OE Naziv OE TIP OE and return select * from (select a.iid_organizacijske_enote, a.sifra_organizacijske_enote, a.naziv_organizacijske_enote, a.tip_organizacijske_enote i try with regex, indexOf() but no one works ok

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  • [genshi] Print string as HTML

    - by infinito
    Hello, I would like to know if is there any way to convert a plain unicode string to HTML in Genshi, so, for example, it renders newlines as <br/>. I want this to render some text entered in a textarea. Thanks in advance!

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