Hi, I have reflectance spectrum of an object obtained using spectroradiometer in sunlight. I have obtained hyperspectral reflectance image of the same object using a hyperspec camera at the same time. Now using envi, extracted spectrum from pixel at a location where the object is present. Resampled spectroradiometer spectrum to same wavelength values as that of hyperspec. I want to directly comparing the two reflectance spectra (spectroradiometer and imaging spectro) is valid or should I consider normalizing one of the spectrum with respect to the other before comparing? If have to normalize, please let know how to do that. Please find the attachment of file containing spectra plotted in a single plot (ground and drone). I want to do get clarified before developing atmospheric model for the data. Please help!
Please normalize your spectra taken from each sensor to the white references respectively taken from the same sensor.
Please have a look at my response to your recent question:
https://www.researchgate.net/post/spectral_normalization_for_two_different_sensors
How do we find the bias and gain of a sensor from these spectra? One thing to be noted is the ground spectra was collected by asd spectroradiometer on 16th may, 18 almost at the same time I.e., in the evening around 3:30pm. The image was taken by drone mounted headwall's micro-hyperspec on 18th may, 18 at around 3:30pm. Then the image spectra were not collected from georectified image. Rather, spectra were collected from ungeorectified reflectance image given by the sensor directly. Meaning they were collected from image in which roll, pitch, yaw were not taken cared.
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