Method and system for building short-wave, medium-wave and long-wave infrared spectrum dictionary

A system for building a short-wave, medium-wave and long-wave infrared spectrum dictionary for preparation of a computational imaging spectrometer, the system comprising:

• an infrared three-primary-color sensor group, configured to measure to obtain infrared spectrum response curves under a condition of variable input signals, wherein the infrared three-primary-color sensor group comprises:
• a short-wave infrared sensor, a medium-wave infrared sensor and a long-wave infrared sensor;
• an infrared three-primary-color chromaticity diagram building module, configured to perform normalization on the infrared spectrum response curves of the infrared three-primary-color sensor group, use same as spectrum-based functions, and take the proportions of the sum of tristimulus values accounted for by the tristimulus values corresponding to an infrared imaging sensor group as chromaticity of an infrared band to form an infrared three-primary-color chromaticity diagram;
• an initial image-space infrared dictionary building module, configured to perform weighted combination on the infrared spectrum response curves to build an initial image-space infrared spectrum dictionary;
• a final image-space infrared dictionary building module, configured to perform multi-scale discretization on the infrared three-primary-color chromaticity diagram, cluster chromaticity coordinates generated by discretization into different groups, perform weighted combination on infrared spectrum response curves corresponding to the chromaticity coordinates of each point in the groups, generate a new image-space infrared spectrum, add the new image-space infrared spectrum to the initial image-space infrared spectrum dictionary, and generate a final image-space infrared spectrum dictionary;
• an object-space Planck spectrum dictionary building module, configured to perform weighted combination on object-space Planck curves associated with three different temperatures to build an object-space Planck spectrum dictionary, wherein the object-space Planck curves associated with three different temperatures are respectively a high-temperature object-space Planck curve, a medium-temperature object-space Planck curve and a low-temperature object-space Planck curve according to the temperatures;
• and
• a short-wave, medium-wave and long-wave infrared spectrum dictionary building module, configured to build a short-wave, medium-wave and long-wave infrared spectrum dictionary by using the final image-space infrared spectrum dictionary and the object-space Planck spectrum dictionary,
• wherein the computational imaging spectrometer is prepared with the short-wave, medium-wave and long-wave infrared spectrum dictionary.

A method for building a short-wave, medium-wave and long-wave infrared spectrum dictionary, the method comprising:

• obtaining infrared spectrum response curves of an infrared three-primary-color sensor group under a condition of variable input signals, wherein the infrared three-primary-color sensor group comprises:
• a short-wave infrared sensor, a medium-wave infrared sensor, and a long-wave infrared sensor;
• performing normalization on the infrared spectrum response curves of an infrared three-primary-color sensor group, using same as spectrum-based functions, and taking the proportions of the sum of tristimulus values accounted for by the tristimulus values corresponding to an infrared imaging sensor group as chromaticity of an infrared band to form an infrared three-primary-color chromaticity diagram;
• performing weighted combination on the infrared spectrum response curves to build an initial image-space infrared spectrum dictionary;
• performing multi-scale discretization on the infrared three-primary-color chromaticity diagram, clustering chromaticity coordinates generated by discretization into different groups, performing weighted combination on the infrared spectrum response curves corresponding to the chromaticity coordinates of each point in the groups, generating a new image-space infrared spectrum, adding the new image-space infrared spectrum to the initial image-space infrared spectrum dictionary, and generating a final image-space infrared spectrum dictionary;
• performing weighted combination on object-space Planck curves associated with three different temperatures to build an object-space Planck spectrum dictionary, wherein the object-space Planck curves associated with three different temperatures are respectively a high-temperature object-space Planck curve, a medium-temperature object-space Planck curve and a low-temperature object-space Planck curve according to the temperatures;
• and
• building a short-wave, medium-wave and long-wave infrared spectrum dictionary using the final image-space infrared spectrum dictionary and the object-space Planck spectrum dictionary.

A system for building a short-wave, medium-wave and long-wave infrared spectrum dictionary, comprising:

• an infrared three-primary-color sensor group, configured to measure to obtain infrared spectrum response curves under a condition of variable input signals, wherein the infrared three-primary-color sensor group comprises:
• a short-wave infrared sensor, a medium-wave infrared sensor and a long-wave infrared sensor;
• an infrared three-primary-color chromaticity diagram building module, configured to perform normalization on the infrared spectrum response curves of the infrared three-primary-color sensor group, use same as spectrum-based functions, and take the proportions of the sum of tristimulus values accounted for by the tristimulus values corresponding to an infrared imaging sensor group as chromaticity of an infrared band to form an infrared three-primary-color chromaticity diagram;
• an initial image-space infrared dictionary building module, configured to perform weighted combination on the infrared spectrum response curves to build an initial image-space infrared spectrum dictionary;
• a final image-space infrared dictionary building module, configured to perform multi-scale discretization on the infrared three-primary-color chromaticity diagram, cluster chromaticity coordinates generated by discretization into different groups, perform weighted combination on infrared spectrum response curves corresponding to the chromaticity coordinates of each point in the groups, generate a new image-space infrared spectrum, add the new image-space infrared spectrum to the initial image-space infrared spectrum dictionary, and generate a final image-space infrared spectrum dictionary;
• an object-space Planck spectrum dictionary building module, configured to perform weighted combination on object-space Planck curves associated with three different temperatures to build an object-space Planck spectrum dictionary, wherein the object-space Planck curves associated with three different temperatures are respectively a high-temperature object-space Planck curve, a medium-temperature object-space Planck curve and a low-temperature object-space Planck curve according to the temperatures;
• and
• a short-wave, medium-wave and long-wave infrared spectrum dictionary building module, configured to build a short-wave, medium-wave and a long-wave infrared spectrum dictionary by using the final image-space infrared spectrum dictionary and the object-space Planck spectrum dictionary.