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Framemarkers uploaded as ImageTarget

September 19, 2011 - 3:18pm #1

Hi,

We're doing experiment uploading FrameMarkers to the ImageTarget uploader. We noticed a few things and along with questions:

1. Why does the uploaded images get resized?

2. FrameMarker size-equivalent images are getting anti-aliased and why?

3. Why did the FrameMarkers work a lot better than having them being uploaded as image targets?

4. How can we make uploaded FrameMarkers work better?

Could you please keep the

December 26, 2012 - 2:02am #4

Could you please keep the posts in the same area, because it simply causes confusion and delays responses.

https://developer.vuforia.com/forum/ios/drop-frame-ios

...as I did ask you questions there about which device you are using but you did not reply.

N

Frame Marker fast?? Why?

December 25, 2012 - 5:04am #3

I did a Image target project with a 3D obj for Iphone 4, but its look heavy when runs over the image target. Then i did the same project with Frame marker and the diference in performance is HUGE, in order to speed, tracking, and fluid camera. Why this happend? any help?

Re: Framemarkers uploaded as ImageTarget

September 21, 2011 - 9:26am #2

Frame markers and image targets are very different things. Image targets are detected by unique features found in the image (e.g. high contrast corners). The features should be randomly and evenly scattered throughout the image for tracking to work best. See our chips and stones targets for good examples.

Frame markers work more like a barcode, the squares around the frame are a binary code. They do no count as good features for the image tracker, and the inside of the frame marker does not provide any features for tracking.

We don't suggest using an image as small as the frame marker files for image targets, there won't be enough features at that resolution.

- Kim

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