3 results about "Reflectance spectroscopy" patented technology

A method and system for constructing a freshness detection model for leafy vegetables. This invention relates to the field of non-destructive testing technology for leafy vegetables, specifically a method and system for constructing a freshness detection model for leafy vegetables. The invention constructs a comprehensive evaluation index that can reflect changes in the quality of leafy vegetables from multiple perspectives. Based on this, it combines visible-near-infrared reflectance spectroscopy technology and further extracts representative dimensionality-reduced spectral indices to reduce redundancy and interference in spectral data, achieving rapid, accurate, and non-destructive detection of freshness. The method uses the test results of a leafy vegetable sample set as a judgment condition to construct a comprehensive freshness evaluation mechanism and screen methods for constructing comprehensive freshness indices. Based on the above method, the comprehensive freshness index value of leafy vegetables is obtained. From the dimensionality-reduced spectral data, spectral indices are selected to construct several freshness detection models. The optimal freshness detection model is selected and approved to detect the freshness of leafy vegetables.

The application discloses a kind of based on image recognition's demolition garbage aggregate classification method, belong to demolition garbage processing technical field.The application collects the visible light image of aggregate, ultraviolet induced fluorescence image and infrared thermal image under pulse thermal excitation, shape class and shape irregularity index are extracted from visible light image, mortar coverage is extracted from ultraviolet fluorescence image, and microcrack density is extracted from infrared thermal image;Then determine shape grade and defect grade, fuse and output first to fourth level classification label.The application also identifies red brick particles through near-infrared reflectance spectroscopy, and distinguishes demolition induced cracks from original microcracks using thermal decay characteristics.The application realizes comprehensive, rapid and automated evaluation of aggregate shape, surface mortar, internal cracks and impurities, and the classification results can directly guide the utilization of aggregate resources, effectively improving the utilization rate of demolition garbage aggregate with high added value.