A resolution enhancement method and system for an event image
A resolution enhancement and event technology is applied in the field of resolution enhancement methods and systems of event images to achieve the effects of improving resolution, enhancing resolution, and filling the gaps in the field of resolution enhancement.
Active Publication Date: 2020-11-10
TSINGHUA UNIV
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The event image is a form of spatio-temporal event flow, so the super-resolution reconstruction method of the traditional frame image cannot be directly used for this event image
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[0051] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0052] In order to better illustrate the solution of the present invention, the following first introduces the event camera:
[0053] The event camera is a device that simulates the information encoding method of the biological retina. Its information output is in the form of spatio-temporal event flow. The event camera detects when and where the intensity changes in the light field, and its data output format is in the form of address event Represents the event stream form of (Address-Event Representation, AER). In the AER format, an event e is represented as a 4-tuple (x, y, t, p). Each event consists of the physical address (x, y) of the pixel that generated the event...
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The present invention provides a resolution enhancement method and system for event images. The method includes: S1, divide the event image into the first type of event stream and the second type of event stream; S2, for each type of event stream, based on the event number distribution matrix and the issuance rate function of each type of event stream, based on rejection sampling Algorithm, obtain the target event sequence of each pixel; S3, merge the target event sequence of all pixels of the first type of event stream with the target event sequence of all pixels of the second type of event stream to obtain the resolution of the event image Enhancement event image after enhancement. The event sequence of each pixel of the enhanced event stream corresponding to each polarity event stream is sampled through a rejection sampling algorithm, thereby achieving resolution enhancement of low-resolution event images. It fills the gap in the field of event image resolution enhancement and effectively improves the resolution of event images, which is beneficial to various applications of event images.
Description
technical field [0001] The present invention relates to the technical field of image processing, and more particularly, to a method and system for enhancing the resolution of an event image. Background technique [0002] The event camera is a device that simulates the information encoding method of the biological retina, and its information output is in the form of a spatiotemporal event stream. figure 1 A schematic diagram of the working principle of the event camera, such as figure 1 as shown, figure 1 (a) shows the rotation process of a rotating dot to be recorded by the event camera, figure 1 (b) shows the event stream output by the event camera, figure 1 (c) shows the pattern display of the accumulation of spatiotemporal events on a two-dimensional map at a certain time. [0003] Silicon-based event cameras are also called silicon retinas or dynamic vision sensors (Dynamic Vision Sensor, DVS). Unlike conventional frame-based cameras, which acquire light intensity i...
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IPC IPC(8): G06T5/00G06T3/40
CPCG06T3/4023G06T5/00
Inventor 施路平李洪敏何伟杨哲宇裴京
Owner TSINGHUA UNIV