Contrast Enhancement of Transgressive Surface Referenced Stratal-Slices by Adaptive Color Encoding

Adaptive color encoding faciliated stratal slice based interpretation in two ways. Firstly, it enhances the contrast of amplitude map, and secondly it saves considerable time for people to manually adjust the color code to dynamic range of amplitude to a large quantity of slices. Several contrast enhancement methods were discussed in this paper including histogram equalization based techniques and gamma correction, when applied to the stratal slices extracted from Pinghu clastic rocks, East China Sea. As the value of quality metrics (PSNR and SSIM) decreases after contrast enhancement, more geology details tend to be revealed at cost of acceptable noise amplification. Apart from histogram stretch, contrast enhancement with amplitude preservation was made possible by the generation of non-linear color coding. In the application, the method was applied on Transgressive Surface (TS) referenced stratal slices, and the resultant maps served an aide to the recognition of fluvial and tidal reservoirs during Eocene period in Pinghu region, East China Sea.