Adaptive light source illumination system and method used for cultural relic fine 3D reconstruction

Abstract

The invention relates to an adaptive light source illumination system used for cultural relic fine 3D reconstruction. The system includes a plurality of light sources, a light source controller, a computer, an image acquiring device and an image quality evaluation module. The light sources are used for lighting a to-be-reconstructed cultural relic from different directions. The image acquiring device is used for acquiring an image of the to-be-reconstructed cultural relic. The image quality evaluation module is used for performing evaluation on quality of the acquired image. The computer controls the light source controller according the evaluation result of the image quality evaluation module. The light source controller controls the luminance level of the different light sources according to commands of the computer. The invention also relates to an adaptive light source illumination method used for cultural relic fine 3D reconstruction. According to the invention, light source luminance can be adjusted automatically according to different to-be-reconstructed cultural relics and multi-directional lighting is realized, so that a platform camera can acquire the optimal image effect.

Description

technical field [0001] The invention relates to light source lighting in the technical field of image measurement, in particular to an adaptive light source lighting system and method for fine 3D reconstruction of cultural relics. Background technique [0002] The light source lighting system is one of the most critical parts of the automatic framing platform control system that supports 3D reconstruction of cultural relics. Its main goal is to project light onto the measured object in a suitable way to highlight the contrast of the measured feature parts. The light source has a great influence on the image quality. Factors such as the uniformity, geometry, light intensity, light direction, and wavelength of the light source will directly affect the measurement results. It is often the key to the success or failure of the entire system. This requires the light source and lighting scheme The matching of the object should highlight the feature quantity of the object as much as...

AI Technical Summary

Problems solved by technology

[0003] At present, there are various structures of lighting sources used for image measurement, mainly multi-angle lighting ring lights, strip lights, coaxial lights, Dome light sources, etc. However, the above types of light source configurations will more or less cause the following problems, Scattering and overexposure hide important information of the image; shadows cause false detection of edges; reduction of signal-to-noise ratio and uneven lighting make it difficult to select thresholds for image processing

In general image measurement, the selection of illumination intensity is mostly obtained by manual debugging and multiple comparisons, which has the disadvantages of being greatly affected by human factors and low measurement efficiency.

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