1. A method of image processing in an augmented reality application, the application executed by one or more processors, comprising: receiving an image of a real environment; processing the image in an augmented reality application by a vision-based processing or tracking technique to overlay a visualization of digital information onto the image of the real environment or a view of the real environment; adjusting a threshold of re-projection error of the visualization of digital information based on a pixel density of a display device; adjusting at least one of a parameter and an operating flow of the vision-based processing or tracking technique; and presenting the visualization of digital information using the display device.