augmented-reality | 易学教程

How to start writing an augmented reality application

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问题 I have been looking at creating an augmented reality application. Can anyone suggest a preferred technology platform to start writing an application of this kind. I would like this to be a desktop application and not a mobile application. Therefore I want to use a webcam with object recognition. Thanks! 回答1: FLARToolKit is another good place to look. It's free and uses flash + Actionsctript 3. gotoandlearn DOT com has a couple good video tutorial on how to use the library, I'd give you links

create opencv camera matrix for iPhone 5 solvepnp

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问题 I am developing an application for the iPhone using opencv. I have to use the method solvePnPRansac: http://opencv.willowgarage.com/documentation/cpp/camera_calibration_and_3d_reconstruction.html For this method I need to provide a camera matrix: __ __ | fx 0 cx | | 0 fy cy | |_0 0 1 _| where cx and cy represent the center pixel positions of the image and fx and fy represent focal lengths, but that is all the documentation says. I am unsure what to provide for these focal lengths. The iPhone

Vision based Augmented Reality Objective-C library

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I'm looking for an Objective-C library / or just help in building a vision-based augmented reality application that does not rely on visual markers. Qualcomm 's is perfect, but only on Android (iOS is coming, but not soon enough). Any body know any other similar libraries? QCAR for iOS has recently been released into public beta. The only one I'm aware of is String , and I've become aware of that only via this iPhone + Kinect AR video (YouTube link) that recently did the rounds. So I've no direct experience of using it and no opinion on it, but I nevertheless think it qualifies as an answer to

Real TIme Image Processing (OCR) [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I am planing to develop an app like Word Lens. Can any one suggest a good library that I can use? or any one explain technology behind the Word Lens App? is it reel time image matching or OCR? I know some image processing library like OpenCv, tesseract...Any help is greatly appreciated... 回答1: I'm one of the

Fast, very lightweight algorithm for camera motion detection?

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问题 I'm working on an augmented reality app for iPhone that involves a very processor-intensive object recognition algorithm (pushing the CPU at 100% it can get through maybe 5 frames per second), and in an effort to both save battery power and make the whole thing less "jittery" I'm trying to come up with a way to only run that object recognizer when the user is actually moving the camera around. My first thought was to simply use the iPhone's accelerometers / gyroscope, but in testing I found

Face filter implementation like MSQRD/SnapChat [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . I want to develop the live face filters as MSQRD/Snapchat live filters but did not able to find out how should I proceed should I use Augmented Reality framework and detect face OR use core image to detect the face and process accordingly. Please let me know if anyone has the idea

Anyone know of good tutorials for creating an Augmented Reality application from scratch or using an open source framework? [closed]

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Closed. This question is off-topic. It is not currently accepting answers. Learn more . Want to improve this question? Update the question so it's on-topic for Stack Overflow. I am looking for good tutorials that go through every step of creating an AR application. It would be beneficial if it also covers some of the theory behind optics and such. A good setup is to use ARToolKit plus osgART . The tutorial of ARToolKit also explains also some of the principles of Computer Vision: http://www.hitl.washington.edu/artoolkit/documentation/ osgART is the ARToolKit for OpenSceneGraph and abstracts

Google Cardboard VR sensors

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I'm using the Google Cardboard (its HeadTracker class) to detect certain things about device rotation in an AR application. It works very well. However, on some devices, it doesn't work (nothing happens). I assume this is because they don't have the necessary sensors. My questions: 1) I want to detect at runtime whether the current device supports the HeadTracker, i.e. it has the necessary sensors available. For this, I need to know which sensors are used by HeadTracker, so that I can query if those sensors are present. What are these sensors? 2) Is there a way to specify the necessary sensors

iOS augmented reality with compass and location

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I'm trying to develop a mini "Around Me" like using camera, compass and location. I would like to display place's images on my screen. For the moment I have my location and my orientation with compass. I would like to know how can I determine the position of the place I want to display. Thanks for your help ;) Once you have relative distance and bearing, which you can determine from two points in the same coordinate space using algorithms found on this page , figuring out where a known coordinate is with respect to a known viewpoint is basically a perspective projection, the math is outlined

How to integrate the metaio + Open CV for android application?

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Hi i'm trying to create a application related to the Augmented Reality (AR) and was able to configure my application with Metaio SDK and OpenCV library successfully in two separate application. but the thing is i want to use both the library of OpenCV and Metaio together into one application. so can any one help me with its integration. In my single application I want to use OpenCV for markerless detection and MetaIO for 3D Model rendering. Metaio: http://www.metaio.com/ OpenCV: http://opencv.org/ =====> I'm using opencv to detect shapes in a camera image and want to display 3D objects