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  • How can I read data from a generated pointcloud, but from an other perspective of the camera? [migrated]

    - by Vlad Lata
    Basically what I'm trying to do is as follows: I have a software that generates and shows a pointcloud by analyzing Time-of-Flight data (Z-Data). This software has a GUI that delivers this pointcloud on a grid, and you can watch it and adjust the camera to change the perspective, or apply filtering to it and so on. Since the Z-data was recorder through a stereoscopic system, I want to obtain a perspective transformation. My idea was to simply change the position of the camera in the GUI and than add a button that sais (ex. New Perspective) that calls a function that would measure the distances from the existing pointcloud to the camera I'm viewing it from. Of course this would generate some occluded areas, but I want this to happen. And now the main question is: How can I do that? Are there any functions in OpenGL that measure the distance from an object to a camera, or is it even possible to do something like his? Or has someone some other idea? P.S. The software uses the qt sdk and opengl

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  • Using gluLookAt to move camera in 2D iPhone game ?

    - by Mr.Gando
    Hey guys, I'm trying to use gluLookAt to move the camera in my iPhone game, but every time I've tried to use gluLookAt my screen just goes "blank" ( grey in this case ) I'm trying to render a simple triangle and to move the camera, this is my code: to setup my scene I do: glViewport(0, 0, backingWidth, backingHeight); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glRotatef(-90.0, 0.0, 0.0, 1.0); //using iPhone in horizontal mode glOrthof(-240, 240, -160, 160, -1, 1); glMatrixMode(GL_MODELVIEW); then my "triangle rendering" code looks like: GLfloat triangle[] = {0, 100, 100, 0, -100, 0,}; glClearColor(0.7, 0.7, 0.7, 1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnableClientState(GL_VERTEX_ARRAY); glColor4f(1.0, 0.0, 0.0, 1.0); glVertexPointer(2, GL_FLOAT, 0, &triangle); glDrawArrays(GL_TRIANGLES, 0, 6); glDisableClientState(GL_VERTEX_ARRAY); This draws a red triangle in the middle of the screen, when I try to apply gluLookAt ( I got the implementation of the function from Cocos2D so I asume it's correct ), i do: glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0,0,1,0,0,0,0,0,1); // try to move the camera a bit ? GLfloat triangle[] = {0, 100, 100, 0, -100, 0,}; glClearColor(0.7, 0.7, 0.7, 1.0); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnableClientState(GL_VERTEX_ARRAY); glColor4f(1.0, 0.0, 0.0, 1.0); glVertexPointer(2, GL_FLOAT, 0, &triangle); glDrawArrays(GL_TRIANGLES, 0, 6); glDisableClientState(GL_VERTEX_ARRAY); This leads me to grey screen (glClearColor is grey), I've tried all sort of things and read what I've found about gluLookAt on the net, but no luck :(, if someone could explain me or show me how to move to move the camera in a top-down fashion ( zelda, etc ), I would really appreciate it. Thanks!

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  • Unity3D: How to make the camera focus a moving game object with ITween?

    - by nathan
    I'm trying to write a solar system with Unity3D. Planets are sphere game objects rotating around another sphere game object representing the star. What i want to achieve is let the user click on a planet and then zoom the camera on this planet and then make the camera follow and keep it centered on the screen while it keep moving around the star. I decided to use iTween library and so far i was able to create the zoom effect using iTween.MoveUpdate. My problem is that the focused planet does not say properly centered as it moves. Here is the relevant part of my script: void Update () { if (Input.GetButtonDown("Fire1")) { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); RaycastHit hit; if (Physics.Raycast(ray, out hit, Mathf.Infinity, concernedLayers)) { selectedPlanet = hit.collider.gameObject; } } } void LateUpdate() { if (selectedPlanet != null) { Vector3 pos = selectedPlanet.transform.position; pos.z = selectedPlanet.transform.position.z - selectedPlanet.transform.localScale.z; pos.y = selectedPlanet.transform.position.y; iTween.MoveUpdate(Camera.main.gameObject, pos, 2); } } What do i need to add to this script to make the selected planet stay centered on the screen? I hosted my current project as a webplayer application so you see what's going wrong. You can access it here.

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  • Converting stream of jpg files to FLV stream

    - by Mark
    I work with a Panasonic hcm280a camera that can be controlled by my software, It generates a stream of jpeg files that are huge and I want to convert this stream to a FLV stream preferably with a good compressional ration Does FFMpeg do that? I am basically looking for an off the shelve open source software (or commercial software) that can generate that streaming media for me. Again my input is a stream of jpg files that come from the camera server. Any insight or comment would be greatly appreciated Thanks

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  • Has anyone succeeded in converting files to the mpg-format that a Sony Digital Camera can play?

    - by user645552
    I'm trying to play a mpeg movie on my Sony Cybershot digital camera, it's from a DV-camera converted to MPEG1. But sony refuses to play it with File error. The only files sony can play are from my previous Sony camera. The other way around gives no problem, the movies the camera takes play on various software media players. Has anyone succeeded in converting files to the mpg-format that a Sony Digital Camera can play?

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  • Extracting iPhone Exposure Setting

    - by dereck
    It seems that a similar question has been asked before, http://stackoverflow.com/questions/373357/obtaining-iphone-photo-exposure-information I wondering with the new iPhone camera, if there is any way to extract exposure data from the camera? it seems that it is able to sample different exposures based on where you focus, but I have yet to find any further documentation. Thanks

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  • How to allow tap-to-focus on the camera using an overlay

    - by AJJ
    The standard 3GS iPhone camera includes tap-to-focus (I can tap to the region I want to focus on). However when I use a custom overlay using the UIImagePickerController class, the tap to focus does not seem to work. Everything else in terms of capturing images programmatically etc is working btw. Note that my overlay view is only a small rectangle (UIView) at the bottom of the screen. It does not cover the other areas of the camera. So I believe the taps should go through (unless I am missing something). I have seen other apps use an overlay and still provide a tap-to-focus functionality, so there must be a way to do this. I use all the default controls set to be hidden as: imagePicker.showsCameraControls = NO; imagePicker.toolbarHidden = YES; imagePicker.navigationBarHidden = YES; Of course changing the above does not let me tap-to-focus (it just enables the toolbars, etc). I could not find any answers on the UIImagePickerController class reference. Any help would be greatly appreciated. Thanks!

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  • Setting up Dynamic DNS for Wireless Cameras And Accessing them Remotely

    - by Mike Szp.
    I've been trying to set up two TP LINK wireless N cameras that I bought so that I can see them remotely. I've set it up so that each has it's own ip address (192...105/192...106) and I can access them if I type that into the browser of a local computer The thing is that I don't know how to access them from another remote PC. My current setup is a a each camera connected to the router which then connects to the modem. When I set up the Dynamic DNS, and I access the "webpage" for my IP through a remote computer, it just goes to the configuration page of the modem. I have no idea how to make it go to the router or to the cameras. the router has its own ip range of 192.168.1.x while the modem has 192.168.2.x To access the cameras I type into the web browser: 192.168.1.114:100 on the local computer but I have no idea how to get there through the webpage of my Dynamic DNS remotely.

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  • Microsoft Visual C++ Runtime error when viewing JPEG files in Explorer

    - by Prince Kitts
    I am getting the following error each time I view JPG files in the windows explorer in Detailed view. Microsoft Visual C++ Runtime Library Assertion failed! Program: C:\Windows\Explorer.EXE File: multimedia\photos\metadatahandler\util.cpp Line: 4706 Expression: MinutesFraction < 1.0 For information on how your program can cause an assertion failure, see the Visual C++ documentation on asserts (Press Retry to debug the application - JIT must be enabled) These pictures were taken from a Nikon Coolpix AW110 camera. I think it is related to some EXIF data that is a date/time. I have tried reinstalling the Visual C++ 2013 and 2008 Run time library and restarting and the problem is still there. I uploaded a sample file here: https://anonfiles.com/file/e346e174708714a88d372e295265a03f (click topmost download button and not the ad below it or just save the opened image)

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  • Excel 2007 Pivot Tables: Overlapping issue hampers my summary sheet

    - by Mike
    I've created a Workbook that has 5 Pivot Tables (PT). I want to make a summary sheet that holds all these PT's, but when they expand the 'not allowed to overlap issue' causes me updating problems - they don't update/expand effectively. Therefore, can't be printed off easily. The sheet would basically help my users give their bosses a simple quick overview of the larger worksheet - this way they would be more inclined to fill it in (give a little too get a little philosophy). I had thought about using the Camera Tool, but I'm not sure how you could make it dynamic, or whether it can be dynamic with a PT? Any advice, links or step-by-steps are greatly appreciated. Thanks Mike.

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  • Security camera for HQ and remote sites?

    - by Atlas
    We want to install security cams at HQ site and 3 remotes sites. Basically: (1) Each site would have N cams (2) Each site should have DVR locally to record everything. What we want is that HQ to be able to see the live/recorded videos of each remote site and including itself. Preferably HQ would have 1 large screen, and display all cams of itself and remotes sites, say showing it in 32x32 cells. Does such system exists?

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  • Zoombrowser EX and supported camera

    - by Phila
    I deleted a printer that I had junked - a Canon. Now Zoombrowser EX says to install a printer that is supported by the program software. What to do to install a HP Officejet so the EasyPhotoPrint part of Zoombrowser will work??

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  • iPad Camera Connection kit?

    - by Adam
    Does anyone know if it is possible to access the iPad's camera connection kit? I would like to read the files off the connected mass storage device. Would this be possible or is this something that only Apple can do in there apps. Thanks

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  • Android camera application

    - by Praween k
    Hi all, I want a sample application for camera in android. If anybody developed any application please share with me along with source code. This will be very helpful for me. Thanks in advance Praween

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