Median filtering method, device, storage medium and electronic equipment
A technology of median value and filtering value, which is applied in the fields of devices, median filtering methods, computer-readable storage media and electronic equipment, can solve the problems that the algorithm cannot adapt to application scenarios, achieve simple median filtering processing, and save computing resources Effect
Active Publication Date: 2021-01-05
厦门码灵半导体技术有限公司
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making its algorithm unable to adapt to more application scenarios
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[0026] Exemplary embodiments of embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0027] In this application, "plurality" means two or more, and "at least one" means one, two or more. For any component, data or structure mentioned in this application, if one is not specifically defined, it can be understood as one or more.
[0028] An embodiment of the present invention proposes a median filtering method implemented by a hardware circuit, so as to quickly and effectively perform median filtering on data / signal sampling values to be median filtered.
[0029] figure 1 is a flowchart illustrating a median filtering method according to some embodiments of the present invention. The median filtering method can be performed by a hardware circuit with computing capabilities.
[0030] Usually, when performing median filtering on data / signal sampling values, a neighborhood window is selected for the data / signal sa...
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The embodiment of the invention provides a median filtering method and device, a computer readable storage medium and electronic equipment. The median filtering method realized through a hardware circuit comprises the following steps: obtaining each sampling value of a neighborhood window currently used for median filtering, wherein each sampling value is latched in a corresponding trigger; executing comparison calculation of the number Z of comparative rounds in parallel according to the following processing, wherein the comparison round number Z is an upward integer value obtained by dividing the number N of sampling values of the neighborhood window by two; Ith wheel, wherein each clock period j is from the ith clock period; comparing the jth sampling value with the (j + 1) th samplingvalue in parallel according to the trigger of the clock, and if the jth sampling value is greater than or less than the (j + 1) th sampling value, sequentially exchanging the jth sampling value with the (j + 1) th sampling value, where i belongs to [1, Z] and j belongs to [i * 2-2]; 1, N-I]; carrying out N-th round of comparison calculation on the N-th round of comparison calculation obtained through the Z-th round of comparison calculation; and using Z + 1 sampling values as median filtering values of the neighborhood window.
Description
technical field [0001] Embodiments of the present invention relate to signal processing technologies, and in particular, to a median filtering method, device, computer-readable storage medium, and electronic equipment. Background technique [0002] Median filtering has a good filtering effect on impulse noise, especially while filtering out noise, it can protect the edge of the signal from being blurred. These excellent characteristics are not available in the linear filtering method. In addition, the median filter is the optimal filter under the "minimum absolute error" criterion, and its algorithm is relatively simple. Therefore, once the median filtering method was proposed, it has been widely used in digital signal processing. [0003] The existing fast algorithm of median filtering generally adopts the following three methods: ① histogram data correction method; ② sample value binary representation logic judgment method; ③ digital and analog selection network method. ...
Claims
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IPC IPC(8): G06T5/00G10L21/0208H03H17/02
Inventor 王新君张敏梁梦雷武堃耿罗锋彭华
Owner 厦门码灵半导体技术有限公司