Abstract
It is known that blur happens naturally if the eye focuses at one distance and the object is displayed at a different distance. Vision scientists and computer graphics engineers frequently attempt to present images that reproduce a depth-dependent blur, but their techniques are wrong because they do not fully consider the human eye's optical aberrations. The aim of the experiment is to choose the method of rendering the blurred source which produces a retinal image that is closest to the retinal image produced by the sharp source and the physical defocusing lens (optical blurred). Two methods of rendering the blurred source have been proposed by computer-generated optics. In the first method, the blurred source is the intensity point spread function (PSF) of the defocusing lens. The second method is deconvolution. This method is based on taking the Fourier transfer of the intensity of the image. We found a deconvolution method that we think is a good method to render images to be the same optical blur with defocusing lens, which produces a retinal image that is closest to the retinal image. We have examined both methods in the lab in different kinds of experiments: 1. visual acuity – We begin by reducing the size of the image until the observer cannot determine its shape. 2. Similarity judgments – We ask observers which of the methods we offer is the closest to the optical blur from their point of view. 3. Depth judgments – We investigate if the observers can use their eye information to make a difference in the depth of the image. We found the deconvolution method is a good method in all kinds of experiments to render images to be the same optical blur with defocusing lens, where it produces a retinal image closest to the retinal image.