34 results about "Lateral inhibition" patented technology

A parallel dynamical system for computing sparse representations of data, i.e., where the data can be fully represented in terms of a small number of non-zero code elements, and for reconstructing compressively sensed images. The system is based on the principles of thresholding and local competition that solves a family of sparse approximation problems corresponding to various sparsity metrics. The system utilizes Locally Competitive Algorithms (LCAs), nodes in a population continually compete with neighboring units using (usually one-way) lateral inhibition to calculate coefficients representing an input in an over complete dictionary.

The invention relates to a lateral inhabitation coefficient determining method based on unilateral attenuation exponential and belongs to the field of image enhancement processing. A lateral inhibition coefficient distribution function is based on the unilateral attenuation exponential, the size of the radius N of a lateral inhibition field range is used for determining a coefficient sigma, the lateral inhibition coefficient is distributed and concentrated in a small lateral inhibition field range through controlling the lateral inhibition coefficient attenuation speed rate to reduce calculation amount of a lateral inhibition network, and a coefficient A is determined based on the optimal lateral inhibition coefficient and the sigma to effectively enhance image visual effects. The method is simple in implementation process, small in calculation amount and obvious in image enhancement effect, and has application and popularization value.

The invention relates to a contour detection method on the basis of a primary visual pathway calculation model. A primary visual pathway computation model is constructed, and contour detection is realized by simulating the transmission and processing process of visual information flows. A classical receptive field direction selection model combining multi-scale features is provided, and a multi-scale feature fusion strategy is utilized to simulate the primary contour response of the retinal ganglion. In a visual pathway from the retinal ganglion to the lateral geniculate nucleus, a space-timecoding mechanism is adopted for reducing redundant features in the primary contour response. A computation model with non-classical receptive field isotropic suppression properties is provided, and bymeans of a synergistic effect of non-subsampled contourlet transform and Gabor transform, a processing effect of lateral suppression characteristics of a non-classical receptive field on texture background information is simulated; a feedforward mechanism of a primary visual pathway to the primary visual cortex is simulated, visual characteristics of multiple visual pathways are fused, and the contour response is finally obtained. According to the contour detection method, a main body contour can be effectively highlighted, and a texture background can be suppressed.

The invention discloses a probabilistic neuron circuit, a topological structure of a probabilistic neural network and an application thereof. The probabilistic neuron circuit comprises an integral capacitor, a non-fixed threshold volatile device and a load resistor; One end of the fixed-threshold volatile device, and the other end of the volatile device is connected to one end of the load resistor. The network topology includes multiple input neuron circuits, multiple probabilistic neuron circuits, and lateral inhibitory neuron circuits; each probabilistic neuron circuit is used to perform a neural network based on its non-fixed excitation threshold and the electrical signals emitted by each input neuron circuit. Random excitation; the inhibitory neuron circuit is used to inhibit the excitation of other subsequent probabilistic neuron circuits when receiving the signals excited by the first n probability neuron circuits. The invention introduces a non-fixed threshold volatile device into the neuron circuit, which greatly expands the application of the neuron circuit, especially can be used to solve non-deterministic problems, and has reliable solution results.