Chinese Academy of Sciences

Lifu Zhang

Xia Tian Zhang

Hongming Zhang

Xuejian Sun

Disclosed is an extraction method for time-space-spectrum four-dimensional remote sensing data. The method includes: obtaining remote sensing images at a preset coverage area during a preset time period (S1); re-projecting the remote sensing images in a way that the respective pixel positions of the respective remote sensing images at different time points are overlapped (S2); storing all of re-projected remote sensing images into a storage unit according to a first preset storage method, or storing all of the re-projected remote sensing images into the storage unit according to a second preset storage method (S3); determining, on the basis of requirement information for data extraction, whether current data format of remote sensing data is a data format matching the requirement information (S4); if yes, determining, on the basis of the requirement information, a storage location of required remote sensing data, and extracting the required remote sensing data (S5). In the case storing is executed through the two preset storage methods above, the time consumption for locating the storage location can be reduced, thus the efficiency in processing the four-dimensional remote sensing data can be improved.

Extraction method for time-space-spectrum four-dimensional remote sensing data

Disclosed are a snapshot-type polarized hyperspectral camera and an imaging method. The camera comprises polarizers (), an image sensor (), and a spectra filter (). The spectra filter () is located on the image sensor (). The polarizers () are located on one side of the image sensor (). The method comprises: shielding and transmitting incident light by means of polarizers (), so as to obtain light signals () with different polarizing angles; receiving, by means of an image sensor (), the light signals with different polarizing angles, which are obtained by the polarizers (), and converting the light signals with different polarizing angles into electric signals (); and receiving, by means of a spectra filter (), the electric signals converted by the image sensor (), and filtering the electric signals, so as to obtain high-frequency electric signals () with a preset wavelength. By integrating a spectra filter () on a tiled pixel array of a sensor, a rapidly changing scene can be imaged; and meanwhile, by sticking a plurality of polarizers () into each channel with a specific wavelength, more exquisite imaging is realized.

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Beijing, China

Lifu Zhang