Elimination Effect on Perceiving Jaggies in Digital Images By Pseudorandom Pixel Placement

Abstract

The pixels in the conventional image systems are located in lattice places, and the lattice placement of pixels causes the jaggy in the image, which often cause the severe defect in the image quality. The conventional approaches to overcome this jaggy problem are such as the increased number of pixels or anti-aliasing. However, the step in jaggy is strongly perceived by the eye, and the number of pixels is limited by the physical size of pixel circuit, and the anti-aliasing intrinsically causes the blurred image and the effect of jaggy elimination is dependent on the angle of the object in image. The authors have been proposing and evaluating the image systems with pixels whose positions of the active area, effective area composing images, such as photo receptors or display element, are pseudorandomly placed in order to decrease the effect of the jaggy. In this paper, we describe the experiments of subjective evaluation for jaggy in both lattice and pseudorandom pixel placement.