By mpellegr
on Thu, 08/01/2013 - 20:23
I tried improving my trackable by using the "local contrast enhancement" technique from this link: https://developer.vuforia.com/resources/dev-guide/image-target-enhancement-tricks. I was able to get a 5 star trackable image, but when I go to look at the features Vuforia found, I see the 8% border around my image, but then I see a maybe 25-35% portion at the bottom that has no features. Is there a limit to the amount of features looked for and if that maximum is hit the rest of the image is ignored? Is this going to cause any issues because the features aren't evenly distributed in the image?
Features found are only in upper portion of trackable
The feature count is not limited.
Does the lower region of the image contain features that should have been acknowledged?
Features found are only in upper portion of trackable
Yes the lower region does. This image I used was one that I applied local contrast enhancement to, as per the tutorial. I attached it and the original so you can have a look if you want.
Features found are only in upper portion of trackable
Good. I've checked your targets and confirmed that the LCE version is missing feature hash marks in the region you described.
Features found are only in upper portion of trackable
On most of my targets the Target Manager isnt showing features in the bottom as well? is this just a display bug of the "show features function"
?
Features found are only in upper portion of trackable
I think that it's a bug. Can you send me an example of the target you're using?
Features found are only in upper portion of trackable
This is the most simple experiment i can find at the moment. The Top has lots of features marked but the bottom nothing.
Features found are only in upper portion of trackable
im getting the same thing features in the top 75% of image, nothing in bottom 25%. I rotated the image 180 and the same thing -features in the top 75% of image, nothing in bottom 25%. Im guessing bug in the display features part of the website.
Features found are only in upper portion of trackable
Yes , we're looking into the problem - it's doesn't affect the Trackable itself, only the hashed image, and only certain target images are affected.
Can you send me an example of the target that you're seeing this on?
Features found are only in upper portion of trackable
yes here
Features found are only in upper portion of trackable
Hi eskimos, we have identified the issue related to your image, and we are working on a solution.
We will update you on the progress of this.
Features found are only in upper portion of trackable
UPDATE:
the issue is fixed on the current Target Manager.