System and method for visual signal-to-noise ratio examination in visual function training
A signal-to-noise ratio and visual technology, which is applied in the field of visual function training, can solve the problem of no visual signal-to-noise ratio measurement method, etc., and achieve the effect of intuitive inspection results and convenient operation.
Active Publication Date: 2019-08-16
广州视景医疗软件有限公司
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There is currently no visual signal-to-noise ratio measurement method
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[0017] A visual signal-to-noise ratio inspection method described in the present invention will be described below in conjunction with some specific implementation methods. The specific examples are to further describe the present invention in detail, without limiting the protection scope of the present invention.
[0018] The method for checking the visual signal-to-noise ratio in the visual function training of the present invention has the characteristics of convenient operation, low cost, scientific objectivity and rapid popularization.
[0019] The method for visual signal-to-noise ratio inspection in visual function training of the present invention comprises the following steps: generating a directional visual signal-to-noise optotype, said visual signal-to-noise optotype is composed of two parts, one part is a background part, and is uniform The noise image, the other part is the icon, which is superimposed on the background part to determine the direction of the icon,...
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The invention discloses a system and method for visual signal-to-noise ratio examination in visual function training. The method includes steps: generating a visual signal-to-noise optotype with directivity, wherein the visual signal-to-noise optotype consists of a background portion and an icon portion, the icon portion is an icon which is overlaid on the background portion and capable of judgingthe direction, and noise disturbance of image information can be controlled by adjustment of transparency of the icon capable of judging the direction; after a user judges the direction of the optotype through direction keys of a computer keyboard, storing a judgment result, re-generating a new progressive signal-to-noise ratio image according to the judgment result, and repeating so until the user fails to judge the direction of the optotype, so that the signal-to-noise ratio of the last visual signal-to-noise optotype corresponds to a minimum signal-to-noise ratio of the tested eye. The system and the method have advantages of convenience in operation, low cost, easiness in popularization and direct examination results and are beneficial to provide basis for doctors to perform visual diagnosis and make visual function training schemes.
Description
technical field [0001] The invention relates to the technical field of visual function training, in particular to a method and system for visual signal-to-noise ratio inspection in visual function training. Background technique [0002] The evaluation of human visual function is mostly completed by inspections such as visual acuity, visual field, binocular vision function, light vision, and color vision. In most digital image systems, it is often composed of multi-dimensional image signals, and image noise is one of the components. The electrical system and external influences in some processes will make the accurate analysis of image noise very complicated. On the other hand, the image is only a medium for transmitting visual information. The understanding of image information is determined by the human visual system. Different Image noise, the degree of human perception is different, that is, the visual signal-to-noise ratio is different, which is the so-called human nois...
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IPC IPC(8): A61H5/00
CPCA61H5/00A61H2205/024
Inventor 周谟圣吴栩平李朝远
Owner 广州视景医疗软件有限公司