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Handling bad Image Targets, perhaps with preprocessing of camera image

November 19, 2013 - 5:08am #1

So my problem is as follows: I have a already given printout of a book page consisting of much text and little images which I cannot alter in any way. Unfortunately the Image target of this printout has a very low star rating in the target manager so the image tracking doesn't work very well. (the rendered model is flickering a bit) I discovered, that if I make a binary image out of this Image Target, I have full augmentable star rating in the Target Manager. Since I cannot alter my printout this doesn't help very much.

So my thought was: if I could somehow get the camera image before sent to the Tracker, preprocess it so that the binary image of the camera image is sent to the tracker, the result will be way better. Making binary images isn't a problem e.g. with OpenCV, so Is there a way to give the tracker this preprocessed image and if no, does anyone have another solution/approach for my problem? 

Any help is appreciated! Thanks in advance

Handling bad Image Targets, perhaps with preprocessing of camera

November 19, 2013 - 8:53am #8

Unfortunately I have no other suggestions for you.

The trackable rating is crucial to detection and tracking within Vuforia and it is one of the first areas to address when starting a project.

 

Sorry I cannot help you further with this.

N

Handling bad Image Targets, perhaps with preprocessing of camera

November 19, 2013 - 6:23am #7

That's unfortunate. Will this be possible in the near future? Do you or does anyone have any other suggestions for my problem? Can I maybe somehow do the tracking on my own and provide vuforia with (screen?) coordinates and the framework does the rendering stuff for me? Thank you for your time

Handling bad Image Targets, perhaps with preprocessing of camera

November 19, 2013 - 6:13am #6

hmmm, ok.

The tracker cannot receive a different image to that produced by the video feed unfortunately.

N

Handling bad Image Targets, perhaps with preprocessing of camera

November 19, 2013 - 6:05am #5

NalinS wrote:

Have you tried using the binary image in the database instead of the colour one?

Yes, if I have the binary image in the database and a printout of the binary image it works like a charme. If I use the original coloured printout with the binary image in the database it doesn't get tracked at all. That's why I was thinking that if the tracker had a binary image from the camera as well, it would work better.

Handling bad Image Targets, perhaps with preprocessing of camera

November 19, 2013 - 5:59am #4

Have you tried using the binary image in the database instead of the colour one?

N

Handling bad Image Targets, perhaps with preprocessing of camera

November 19, 2013 - 5:25am #3

Oh sorry I wasn't clear enough. By binary image I mean that each pixel has either brightness value 0 or 255.

Handling bad Image Targets, perhaps with preprocessing of camera

November 19, 2013 - 5:22am #2

I discovered, that if I make a binary image out of this Image Target

What do you mean by this?

N

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