Using Multiple On-Site Markers to Create Large-Scale Augmented Reality Experiences on Smartphones

Augmented Reality (AR) tracking for mobile devices is not realiable in environments where large virtual content, such as an entire virtual building, is to be displayed to the user. This paper presents a study on how multiple on-site markers can be used to better align the virtual scene to the real-world environment to improve large-scale AR...

Towards Real-Time Object Removal and Inpainting Through A Diminished Reality Application For Smartphones

Diminished reality (DR) is an extension of augmented reality (AR) in which real objects are concealed, removed, or replaced. State of the art DR implementations are written and evaluated on desktop platforms, and those which are aimed at smartphones use auxiliary data or hardware for image completion. This paper introduces a DR app for Android...

Achieving Perceptual Consistency of Contrast in Physical Images Viewed at Different Distances

According to the Contrast Sensitivity Function, the contrast of different spatial frequency elements of an image will be seen differently depending on distance. We propose a method for compensating for these differences by acting on an image's frequency representation and manipulating the magnitudes of the individual wave functions composing the...

Projector Systems to Control the Material Perception of an Object

The appearance of an object or scene is determined by factors like the material, the lights, the geometry, the position of the observer, and the surroundings.<br/>Changes in these factors can be simulated using a projector-camera setup.<br/>Other research focuses on changing the appearance from the perspective of the projector, or on projector...

Raytracing Mirror Anamorphosis

Mirror anamorphosis is characterised by a distorted projection, where the combination of a mirror and a specific viewpoint lets the observer see the undistorted image. The use of this technique and complex perspective in general has gone from being niche to becoming mainstream. Raytracing poses itself as a solution to solving the math for such...

Reflection art: A drawing interface

Artists that create mirror anamorphosis usually relies on the principle of trial-and-error and manual mathematical calculations. they have to draw a deformed image on the surface to get the desired reflected image on the mirror object. A drawing interface to make this kind of art does not exist currently. In this paper, we make a suitable...

Determining viewing points for catoptric anamorphoses

Finding good viewpoints for catoptric anamorphoses by hand is hard. However, it should be possible to find the optimal viewpoint using just the specifications of the mirror. This problem is solved by first generating a set of candidate viewpoints using the specifications of the mirror. Then all candidates are ranked based on metrics like visible...

The Proposal of a Novel Pattern Matching Technique for Mirror Anamorphosis

Locality mapping captures the displacement imposed by a mirroring surface in anamorphic art. Establishing this mapping for a physical mirror, however, is a difficult task. Applying pattern matching on the distorted reflection is a promising technique, though existing pattern matching strategies are often ill equipped for this particular task....

Estimating image distortions for mirror anamorphoses using sampled point displacements

The principle of a mirror anamorphosis relies on distortion caused by a reflective object of a particular shape and the perspective of a viewer looking into the reflective object to look at an image on the surface. The distortion of the reflected image is intended to form a recognizable image, while the image on the surface looks completely...