In an image taken by typical digital sensors, only those objects within the depth of field are in focus while the others are out of focus. Fusing multi-focused images is particularly useful for resolving this problem. This paper proposes a pixel-based multi-focus image fusion method. While most previous methods use the focus measure calculated independently for each source image, the proposed m...

A computer model is presented for the formation and sensing of defocused images in a typical CCD camera system. A computer simulation system named IDS has been developed based on the computer model. IDS takes as input the camera parameters and the scene parameters. It produces as output a digital image of the scene as sensed by the camera. IDS consists of a number of distinct modules each imple...

The recovery of depth from defocused images involves calcurecovering the depth [2]. lating the depth of various points in a scene by modeling the The problem addressed in this paper is as follows— effect that the focal parameters of the camera have on images Given a scene with object points at unknown depths from acquired with a small depth of field. In the approach to depth the camera, obtain ...

In this paper we address the challenging problem of recovering the depth of a scene from a single image using defocus cue. To achieve this, we first present a novel approach to estimate the amount of spatially varying defocus blur at edge locations. We re-blur the input image and show that the gradient magnitude ratio between the input and re-blurred images depends only on the amount of defocus...

Shooting a real world image with a camera through an optical device gives a 2-D image where at least some parts are affected by a blur and noise. Images can be blurred by atmospheric turbulence, relative motion between sensors and objects, longer exposures, and so on, but the exact cause of blurring may be unknown. Restoration of blurred noisy images (Spiros et al., 2009; 2010; Su et al., 2007)...

The sign of an accommodative response is provided by differences in chromatic aberration between under- and over-accommodated images. We asked whether these differences enable people to judge the depth order of two stimuli in the absence of other depth cues. Two vertical edges separated by an illuminated gap were presented at random relative distances. Exposure was brief, or prolonged with fixe...