Hadamard Transform Spectrometer Spectral Recovery Technology Research

Hadamard transform is similar to the Fourier transform of a spectrum modulationtechnique, which adopt the Hadamard matrix-based, multi-channel and high inputadvantages. Hadamard transform is a multi-channel spectral imaging technology, makebased on Hadamard transform spectrometer with a high signal to noise ratio, andsingle-detector multi-channel simultaneous detection of imaging capability. Therefore,the Hadamard transform especially suitable for weak spectral image analysis. In thisstudy, hadamard transform multi-channel imaging,computer image processingtechnology combined with the imaging spectrometer, a successful recovery from theobject spectrum.Fist, the paper from the perspective of the development of imaging spectroscopyin-depth description of the spectrum is the classification, spectrometer development,and the main application. A more detailed article discusses the Hadamard transform andFourier transform of the advantages and disadvantages, that compared to traditionalFourier transform Hadamard transform has many advantages, the future of a broadspace for development.Secondly, the paper on Hadamard transform theory, spectral recovery principles,and Hadamard template produced a detailed exposition. Describes the evolution of theHadamard templates, and project team in developing the Hadamard transformspectrometer used in the encoding of new devices. In view of some domestic data willHadamard matrix and its S-matrix mix on, this particular Hadamard matrix and thedistinction between S-matrix, gives a clear analysis shows that the respectiveadvantages and disadvantages, and application in engineering practice, the situation.Again, the paper used in the project Hadamard transform imaging spectrometerbrief description of the structure, special equipment designed for the real-time dataprocessing system hardware structure. Real-time processing system of spectrometer inthe other roles were also analyzed.Finally, the paper successfully recover the Hadamard transform imagingspectrometer to the target acquisition of spectral information, the data on the inversionof the target after the pseudo-color composite, synthetic results are satisfactory. Andintroduced the laboratory instrument calibration program. Paper at the end also givethe next step of the recommendations put forward, our vision of the Hadamard spectralimaging technology has a promising future for development.