An artificial retina with a self-organised retinal receptive field tessellation
نویسندگان
چکیده
In this paper we present a means to generate a receptive field tessellation for an artificial retina using a self-organisation methodology. The approach addresses the problem of creating a receptive field tessellation that seamlessly changes from the uniform fovea to the spacevariant periphery of a retina. We sampled and reconstructed images by placing overlapping space-variant receptive fields on this retinal tessellation and scaling the field size according to the local node density. The results of sampling and reconstructing images using the above self-organising retina tessellation are presented.
منابع مشابه
Hierarchical Feature Extraction using a Self-Organized Retinal Receptive Field Sampling Tessellation
This paper examines the problem of hierarchical processing of visual information extracted with a layer of pseudo-randomly tessellated retinal receptive fields. Afferents from the retinal neural layer were processed by a cortical neuron layer resulting in a hierarchy of feature extraction operations similar to that found in biological vision systems. The retinal tessellation was obtained by sel...
متن کاملA low level vision hierarchy based on an irregularly sampled retina
Biological vision systems process signals extracted by a retina that reduces the dimensionality of visual information for processing by higher cortical areas. To date researchers in machine vision have not reported computing a biologically inspired artificial retina that can sample visual information without over-sampling the central foveal region or creating discontinuities in the retinal tess...
متن کاملSaccade Generation for a Space-Variant Artificial Retina
Biological and artificial systems that use a space-variant strategy to extract visual information from a scene using a retina face the problem of targeting their sensor so that the central high acuity foveal region inspects salient regions in the scene. At the same time the coarse peripheral region of the retina must extract visual information over a wide field of view to find new interesting l...
متن کاملEdge Detection Model based on Involuntary Eye Movements of the Eye-retina System
Recent results in retinal research have shown that ganglion receptive fields cover the mammalian retina in a mosaic arrangement with very small overlap. Classical biology inspired models of the retina performing image processing operations such as edge-detection, in contrast, by using convolution of a filter and the image, map overlapping input image regions to output signals. Without such an o...
متن کاملMorphological Exudate Detection in Retinal Images using PCA-based Optic Disc Removal
Diabetic retinopathy lesion detection such as exudate in fundus image of retina can lead to early diagnosis of the disease. Retinal image includes dark areas such as main blood vessels and retinal tissue and also bright areas such as optic disk, optical fibers and lesions e.g. exudate. In this paper, a multistage algorithm for the detection of exudate in foreground is proposed. The algorithm se...
متن کامل