Banknote classification and identification method and device based on lab color space

A banknote classification and recognition device based on a Lab color space, comprising:

• an obtaining module, configured to obtain an RGB image of a banknote to be detected;
• a processing module, configured to calculate gray values Gray R, Gray G and Gray B of the RGB image obtained by the obtaining module in red (R), green (G) and blue (B) wavebands;
• a converting module, configured to convert Gray R, Gray G and Gray B calculated by the processing module into gray values Gray a and Gray b in the Lab color space;
• and
• a determining module, configured to substitute a product of Gray a and Gray b and a difference between the absolute value of Gray a and the absolute value of Gray b into preset formulas to determine a category of the banknote to be detected.