LOU Li, LI Yong. Application research of an improved optical flow algorithm in seismic image texture analysis[J]. 2019, 51(11): 47-54.
DOI:
LOU Li, LI Yong. Application research of an improved optical flow algorithm in seismic image texture analysis[J]. 2019, 51(11): 47-54.DOI: 10.11918/j.issn.0367-6234.201904161.
Application research of an improved optical flow algorithm in seismic image texture analysis
To effectively protect the linear structure of seismic image while eliminating noise
a new method which combines improved optical flow algorithm with texture smoothing filter was proposed. First
the multiple-scale description method of Gauss pyramid was used to solve the problem of large flow velocity calculation and improve its accuracy. Secondly
by setting the threshold value of the mean square root for the residual error of the iteration results
the number of iterations was reduced and the processing time was shortened. Finally
according to the texture complexity of seismic profile image and combined with texture attribute analysis
different templates were selected for texture smoothing filtering to improve the signal-to-noise ratio (SNR). Compared with the conventional median filter and some advanced algorithms such as the improved Sobel filter and the Normalized Full Gradient method for seismic image boundary detection
the proposed algorithm could effectively preserve the edge information of seismic data
and enhance the continuity of seismic image in-phase axis. In particular
the SNR was increased by 7~10 dB
and the processing time was shortened by 2~3 minutes. Experimental results show that by combining the Gauss pyramid multiple-scale description with the optical flow algorithm and the texture smoothing filtering
the texture structure and energy of the original image could be well preserved by the integrated improved algorithm proposed in this paper. Meanwhile
the SNR was enhanced and the processing time was reduced. Therefore
the efficiency of seismic data interpretation was improved
indicating that the proposed algorithm is a better processing method in the field of seismic image texture analysis.