Apparatus for acquiring images of rock core and rock debris, method for acquiring and processing images

Abstract

The invention discloses an apparatus for acquiring images of rock core and rock debris, which comprises a lamp bracket, a master control circuit system and a sample shift mechanism. A light conversion device, a filter lens and a filter lens shift mechanism are provided within the lamp bracket, the filter lens and the filter lens shift mechanism are connected; the sample shift mechanism comprises stepping motors and reduction boxes along two directions of X shaft and Y shaft in a horizontal plane, the control signal input terminal of the stepping motors, light conversion equipment and the filter lens shift mechanism are respectively connected with the corresponding signal output terminal of the master control circuit system. The present invention also discloses a method for acquiring images of rock core and rock debris, the clearest image can be found by automatically searching a clear focal length direction for realizing an automatic focusing. The invention also discloses a method forprocessing the images of rock core and rock debris, an automatic splicing of the images can be completed by successively finding the optimum splicing line in an overlap area. Small rock core (plungertype rock core and the like) and rock debris images can be collected according to the invention, which has the advantages of light mass and small size, high intelligent degree.

Description

technical field [0001] The invention relates to an image acquisition device and an image acquisition and processing method, in particular to a core cuttings image acquisition device and an image acquisition and processing method. Background technique [0002] Rock cores are valuable and non-renewable physical data in petroleum geological exploration and development research work, and a large number of original data in petroleum geological work come from rock cores. After the core comes out of the barrel, on the one hand, manual splitting, truncation, and on-site sampling, or analysis, observation, and sampling by scientific researchers will result in the loss of core information. On the other hand, the weathering of the core over time will also cause information loss. These factors This makes it impossible for subsequent geological research to restore the information description when the core came out of the barrel, reducing the use value of the core. [0003] In order to s...

AI Technical Summary

Problems solved by technology

Its principle is to use the computer-controlled method to collect images on the surface of the rock core, but there are still some shortcomings: (1) the distance between the rubber rollers needs to be adjusted according to the diameter of the rock core, which will cause uneven rotation of the rock core; (2) Mainly for the collection of larger diameter (greater than 3cm) cores, for the collection of smaller diameter cores (such as plunger cores, borehole coring, etc.), because the minimum distance between the rubber rollers is greater than the diameter, it will cause the core (3) The equipment is heavy, bulky, and not easy to carry, so it is not suitable for on-site collection in geological, oil field and other mud logging departments; (4) The degree of intelligence is low, and it is impossible to perform systematic self-inspection, alarm function, and fault location comparison Difficult and difficult to maintain; (5) Inaccurate lighting control, insufficient image clarity and contrast; (6) The shifting mechanism of the sample is a single track, and the shifting control is not precise enough; (7) The focusing accuracy is not enough, and the image effect cannot make (8) Image processing such as image stitching, light equalization and other methods are not good enough, resulting in high image distortion after processing

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