The Study Of Under-well Polarization Optics Imaging Detection Technology

Under-well Visible TV logging is a research hotspot in image logging,which Provide a visual basis for Detection and litter on the casing and other downhole operation salvage. Visible TV logging can be clearly the current state of underground transmission through fiber-optic sensors to the ground display unit with realtime,direct,and convenient.It's proved that underground TV is good benefit for casing inspection.However,Visible TV logging has its limitations,because of the underwell oil mixture and suspended particles have a very strong light scattering,and the underground work of the noise caused by the interference effect of optical imaging, resulting in image resolution is not high. This should help the ground terminal of image processing technology, underground collection of images processed to remove the scattering turbid media, as well as noise, outstanding image detail. Which can be more clearly reflect the whereabouts of underground well casing materials testing and the real situation. In addition, the special circumstances of underground underwater camera on the technical requirements must be waterproof, and pressure and other effects.Based on the most Dongying oil field downhole environment analysis and light propagation in turbid media studies, using ZEMAX optical design software to develop a focal length of the adjustable underwater Eagle Eye optical system, can be suitable for underground high temperature and pressure of the water medium environments. After the process of light propagation optical system (optical components or turbid media), the light will change the polarization state. Because of strong scattering turbid media imaging results led to poor image is not clear, this article on imaging of underwater polarized light, the polarization can be drawn underwater images contain more information content. First introduced the basic principle of polarized light imaging, and design of two underwater Stokes image acquisition experiments, the detection of objects can reflect the degree of polarization of polarization and polarization angle images. Experimental results show that the two images can highlight the edge information and details. In this paper, the image of the polarization image processing part of wavelet transform theory and experiment in the acquisition of polarization image based on the wavelet transform decomposition and reconstruction, the image observed from different scales. Then the image decomposition and reconstruction through the understanding of the image fusion experiments. By histogram equalization to the polarization image and after the polarization angle image fusion experiments, and with horizontal polarization and vertical polarization image image fusion results compared. This experiment, using a variety of experimental materials, things are different in nature from the perspective of detection of experimental effect.