Trigger Image Guidelines

Trigger Images are what the HP Reveal technology uses to recognise, and subsequently initiate AR experiences. As a result, there are specific considerations to make if you want reliable experiences.

This article outlines our recommendations.

  • Recommended shapes of objects

HP Reveal's technology is designed to recognise flat objects - objects with curved or irregular surfaces confuse the technology, and as a result your Overlays may not track/stick to the image very well. When using the Studio, you are expected to upload a print file, or a photo of what you want the technology to recognise, as a result if you are using a label on a bottle for example, the technology is not aware that the bottle is a 3D object. This means that although the experience may start, as soon as the user moves their device away from the position established in the Studio, the experience is likely to stop functioning. Using flat images is more likely to guarantee the best results with the technology.

Likely to run into problems Best Results
Curved or Variable Surfaces


Labels & Packaging

Flat-faced objects




  • Recommended sizes of images

The Reveal technology is going to struggle to pick out features in small images because the camera of a device is going to struggle to focus on the image and as a result we would recommend avoiding anything that is the size of a postage stamp. It is best to use an image that is at least the size of a post card to guarantee that the technology can find the features within the image.

Likely to run into problems Best Results
Image result for postage stamp icon  

Anything similar in size to a postage stamp


Anything larger than a postcard



  • Recommended print finishes

Glossy & reflective surfaces affect the exposure of the camera on the smart device, as well as causes the image to look different to the device depending on the lighting conditions the user is trying to scan. Matte finishes negate this issue.

Likely to run into problems Best Results
Image result for matt finish box packaging png
Glossy / Reflective Print Matte Finishes


  • Recommended shapes in the print

HP Reveal's technology needs distinct features in images so that it can easily recognise the image, but also so that once the experience is initiated, the overlays track well to the image. Images with minimal features are going to cause issues. Text is also likely to cause issues because it does not contain enough visual information. The best thing to do is use images with clear and distinct shapes.

Likely to run into problems Best Results
Image result for packaging minimal text

Image result for poster with distinct shapes png landscape

Minimal Shapes, Numbers or Text

Unique & Clear Shapes


  • Recommended features in the print

For an experience that contains Overlays that stick to the trigger image, we would recommend avoiding repeated or mirrored patterns in your Trigger as this can confuse the technology. Clear and distinct areas of contrast gives good feature points for the technology to latch onto.

Likely to run into problems Best Results

Repeated / Mirrored Patterns

Distinct Areas of Contrast


  • Recommended designs for visually similar print

A lot of users try to use images that look very similar to the technology, but expect the technology to be able to differentiate between them, and play a different experience on each image. As a result, we would recommend that if you have visually similar images, that there is at least one distinguishable feature in each image. Then using the masking tool, you can hide the parts of the image that are similar to one another - this means that the technology is only looking for the parts of the image that are different, and should help avoid the issues.

Likely to run into problems Best Results
Images that share lots of similar features Images that can be similar, but have a visually distinct feature



In conclusion, if you want to guarantee the best result from your images then they should meet all of the following criteria:

  1. Flat images, or flat faced objects
  2. Area larger than a post card
  3. Matte finished print
  4. Definitive shapes
  5. Distinct areas of contrast
  6. Unique features


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