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Maximum marker size

March 11, 2013 - 3:23am #1

"The maximum upload size is 2MB, also be aware that the image is going to be converted to greyscale and scaled down by the Target Manager. Take a look at the 'show features' view to see the results of this conversion. If you are working w/ high resolution images to develop a large scale target, my advice is to compose this target as a MultiTarget using multiple images."


Coudl you tell us what's the maximum size of a marker?

I can see that the downloaded marker bundles contain "marker preview images" (used in Unity Editor to display the marker). All preview image have maximum size 512. Is this the maximum for marker size?

Maximum marker size

July 19, 2016 - 10:26pm #9

Yes, I have uploaded an image in cloud database with resolution 600*907. but in my application detected target image resolution is displaying as 600*888.9

Why the uploaded target resolution is changed ?

because of this am unable to overlap the content on tracker.

can you give suggestion how to resolve this ?

here am attaching screenshots also. please have a look for better understanding.




Maximum marker size

March 11, 2013 - 2:49pm #8

Thanks for the clarification. The image will be downscaled to 320 x 240 pixels.

Maximum marker size

March 11, 2013 - 2:47pm #7

When I said "size" I had in mind "resolution". Sorry, for the confusion. I understand relationship between resolution, file format, compression and file size. The part I don't understand is the relationship between resolution of an uploaded image and resolution of a generated ImageTarget. You said it will be scaled down, how much?

Maximum marker size

March 11, 2013 - 5:28am #6

There is no general relationship between the resolution of your image and the file size;

it depends on the image; 

for instance, the "Chips.jpg" image used in the ImageTargets sample is 1500 x 1050 and about 800 Kb file size.

However, the "Tarmac.jpg" is also 1500 x 1050 pixels, but the file size is 1.6 MB.

It depends on the image, not on the Target Manager.



Maximum marker size

March 11, 2013 - 5:15am #5

How much? 

We want to understand how uploaded image size is related to generated ImageTarget resolution.

Maximum marker size

March 11, 2013 - 4:26am #4

Image Targets will be scaled down, when uploading them to the Target Manager.


Maximum marker size

March 11, 2013 - 4:22am #3

I though the quote was taken from the documentation, but appearently it was from the forum (https://developer.vuforia.com/forum/creating-ar-trackables/target-manager-0).

So ImageTargets won't be scaled down contrary to what was said in the thead above, right?

Maximum marker size

March 11, 2013 - 3:48am #2

Hi, "marker preview images" refer to Markers, however the text snippet you report above (The maximum upload size is 2MB...) is referring to Image Targets; 

these are not the same thing, please check:

In general, if you refer to Image targets, the resolution of the uploaded image is not explicitely constrained, provided that the file (JPG or PNG) is within the 2MB size limit (note: file size, not image resolution).


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