A Color Correction Method of Rare Earth Solution Based on Active Optimization of Gray Edge Parameters

Abstract

The invention discloses method for correcting rare earth solution images under different single illuminations. Aiming at the problem that rare earth solution image color feature-based rare earth element component contact detection has relatively large deviation as rare earth solution image colors change along with light conditions in industrial production of rare earth extraction, the method discloses a rare earth solution color correction method for initiative optimization of Grey Edge parameters. The method comprises the following steps of: firstly adopting a Grey Edge color constancy algorithm, adding region division parameters under the algorithm and carrying out region selection; aiming at the condition of inconsistent optimal light estimation algorithm parameters caused by differentlight conditions and rare earth solution series, optimizing Grey Edge algorithm parameters and region division parameters by adoption of variation-based particle swarm optimization, and decreasing errors between an image appointed area corrected through an opposite angle model and a standard image appointed area so as to realize relatively good correction effect.

Description

technical field [0001] The invention relates to the field of rare earth solution image correction in the rare earth extraction process, and relates to a rare earth solution image color correction method with Gray Edge parameter active optimization. Background technique [0002] Rare earths are composed of 17 elements such as lanthanides, scandium and yttrium, and exist in the form of symbiotic ores. The purification of rare earth elements mainly adopts the cascade extraction and separation process. During the rare earth cascade extraction process, the rare earth solutions in each extraction tank show different color characteristics, forming an "ionic color characteristic band". [0003] Taking the praseodymium / neodymium cascade extraction and separation process as an example, praseodymium ions and neodymium ions are enriched in the extraction section and the washing section respectively, and show characteristic colors such as apple green and purple red respectively. Becaus...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the color of the rare earth solution image changes with the light conditions, resulting in a large deviation in the detection of the rare earth element component content based on the color characteristics of the rare earth solution image, and to correct the rare earth solution images taken under different single light conditions. Under the standard light source D65, the influence of light changes on the rare earth solution image can be better removed

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