4 results about "Diffusion filter" patented technology

The invention relates to the technical field of seismic exploration data processing, in particular to a depth domain seismic data volume high-wavenumber imaging noise iterative filtering method and a depth domain seismic data volume high-wavenumber imaging noise iterative filtering device. The method comprises the following steps: acquiring parameter information of an initial depth domain seismic imaging data volume and a velocity model; carrying out numerical discretization on the diffusion filtering equation according to the parameter information according to a set time step length, a diffusion coefficient and a grid step length, and constructing a first filtering coefficient; according to the parameter information, carrying out numerical discretization on the seismic wave equation according to a set time step length, a speed model and a grid step length, and constructing a second filter coefficient; constructing a filtering operator according to the filtering coefficient; and carrying out imaging noise iterative filtering processing on the initial depth domain seismic imaging data volume by using a filtering operator to obtain a filtered depth domain seismic data volume. The problems of trace processing channel by channel and high-wave-number imaging noise amplitude-preserving suppression are effectively solved, so that the false appearance of reservoir imaging can be eliminated, and depth domain structure interpretation and reservoir research are facilitated.

The invention discloses a fault automatic detection method based on multi-feature fusion and structural guiding filtering, and relates to the technical field of geological data detection, and the method comprises the steps: obtaining a three-dimensional coherent body which is corresponding to seismic data of a target region and reflects the stratum discontinuity; processing the fault features in the three-dimensional coherent body through a multi-scale multi-direction filter to generate a fault boundary enhanced image; according to the fault inclination angle in the three-dimensional coherent body, direction diffusion coefficients corresponding to the principal direction gradient and the vertical direction gradient are calculated; based on the directional diffusion coefficient, performing iterative diffusion filtering processing on the three-dimensional coherent body to generate a fault continuity enhanced image; and generating a fault detection result based on a fusion image between the fault boundary enhanced image and the fault continuity enhanced image. According to the invention, the false detection rate during fault identification is reduced, and the identification precision is improved.

The invention relates to an anti-glare filter module (1) for a projector (20), the anti-glare filter module (1) having: • at least one filter disc (2, 3), which is made as a diffusion filter; • at least one frame module (4), on which the filter disc (2, 3) is mounted so as to be able to slide along a direction of travel (100); • wherein the frame module (4) is made to position the anti-glare filter module (1) on an optical path (200) of the projector (20) such that the direction of travel (100) is oriented transversely to the optical path (200); • wherein the frame module (4) has a rotatably mounted drive element (5), which is made to be rotated by a user; • wherein the frame module (4) has a force transmission system (6), which is made to transmit a force between the drive element (5) and the disc filter (2, 3) for sliding,By rotating the attack element (5), the filter disk (2, 3) moves, in whole or in part, along the optical path (200) in the direction of movement (100). Figure 1,

The invention relates to the technical field of seismic data processing, and discloses a signal-to-noise ratio optimization method and system for post-stack two-dimensional seismic data. The method comprises the following steps: performing well-to-seismic joint calibration on original two-dimensional seismic data to determine main target stratum distribution, and performing spectral analysis to identify a noise frequency band; based on the main target layer distribution, performing segmented Q compensation processing on the original data to obtain a seismic data volume after Q compensation processing; on the basis, spectrum shaping processing is carried out according to the identified noise frequency band so as to suppress the noise and preliminarily improve the signal-to-noise ratio; and finally, diffusion filtering processing is carried out on the data volume after spectrum shaping processing, and a final two-dimensional seismic data volume with an improved signal-to-noise ratio is obtained. According to the method, through series application of Q compensation, spectrum shaping and diffusion filtering, the continuity of the event is effectively improved, the definition of fracture imaging is improved, and a more reliable data basis is provided for structural interpretation and trap evaluation.