Method for acquiring multispectral images based on digital camera

Abstract

The invention provides a method for acquiring multispectral images based on a digital camera. The method includes the steps that firstly, an illumination shooting environment with good illumination uniformity and stability is set up, and the parameters of the focal length, white balance, the aperture, the shutter speed, the ISO value and the like of the digital camera are manually set; on the basis, a training sample color card and a digital image of a target sample are acquired; prediction from an RGB value to an XYZLMS value is achieved through a polynomial model based on a local training sample, finally prediction from the XYZLMS value to a spectral value is achieved through a pseudo-inverse method, and then the multispectral images are acquired based on the digital camera. The method can be widely applied to acquiring multispectral images in the application of digitized book reservation of cultural relics and historic sites, cultural works of art, history documents and the like, machine vision, tele-medicine, spectrum color management, detection of animal and plant diseases and insect pests and the like.

Description

technical field [0001] The invention belongs to the field of image processing, and specifically relates to a multi-spectral image acquisition method based on an ordinary commercial digital camera. Acquisition of multispectral images in applications such as color management, animal and plant pest detection, etc. Background technique [0002] With the comprehensive, systematic and in-depth development of digital information technology, the requirements for the collection accuracy of source object color information are getting higher and higher in actual production and life applications. For example, in the application field of digital collection of cultural relics, cultural artworks, and historical documents, it is inevitable that cultural relics and artworks will weather, mildew, fade and other phenomena over time. There is an urgent need to permanently store the complete original color information of art treasures with high fidelity. In the application fields of machine vis...

AI Technical Summary

Problems solved by technology

"Light source - N narrow-band sensors" obtains multi-spectral images through N sensors. This system has high efficiency in obtaining multi-spectral images, but there is a problem that it is difficult to align the images obtained by each sensor.

No matter what method is used to acquire multispectral images, the current multispectral systems have problems such as complex and large structures, high prices, and low efficiency to varying degrees.

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