问题
I'd like to create an app (on iPhone) which does this:
I have a template image (a logo or any object) and I'd like to find that in camera view and put a layer on the place of where it is found and tracking it!
It is a markless AR with OpenCV!
I read some docs and books and Q&A-s here, but sadly
actually i'd like to create something like this or something like this.
If anyone can send to me some source code or a really useful tutorial (step by step) i'd really be happy!!!
Thank you!
回答1:
Implementing this is not trivial - it involves Augmented Reality combined with template matching and 3D rendering.
A rough outline:
- Use some sort of stable feature extraction to obtain features from the input video stream. (eg. see FAST in OpenCV).
- Combine these features and back-project to estimate the camera parameters and pose. (See Camera Calibration for a discussion, but note that these usually require calibration pattern such as a checkerboard.)
- Use template matching to scan the image for patches of your target image, then use the features and camera parameters to determine the pose of the object.
- Apply the camera and object transforms forward and render the replacement image into the scene.
Implementing all this will require much research and hard work!
There are a few articles on the web you might find useful:
- Simple Augmented Reality for OpenCV
- A minimal library for Augmented Reality
- AR with NyartToolkit
You might like to investigate some of the AR libraries and frameworks available. Wikipedia has a good list:
- AR Software
Notable is Qualcomm's toolkit, which is not FLOSS but appears highly capable.
来源：https://stackoverflow.com/questions/10583062/opencv-ios-real-time-template-matching