Title :
Blind super-resolution considering a point spread function of a pushbroom sattelite imaging system
Author :
Nakazawa, Susumu ; Iwasaki, Akira
Author_Institution :
Dept. of Aeronaut. & Astronaut., Univ. of Tokyo, Tokyo, Japan
Abstract :
A micro-satellite named “HODOYOSI-1” is a 50-kg-weight small remote sensing satellite. It has a pushbroom imaging system in multi-spectral-band: Red (R), Green (G), Blue (B), and two Near infrared (NIR). It is expected that, using super-resolution framework, high-resolution images are obtained from images acquired by two NIR sensors. In the process of super-resolution, it is necessary to estimate sub-pixel shifts and blur kernels of input images. Although pushbroom systems have different blur properties from normal camera systems, it has always been ignored in super-resolution for satellite images. To improve the results of super-resolution applied to pushbroom images, a new blur model, which is more suitable for pushbroom systems, are proposed. The validity of the new blur model is shown by computer simulations and experiments.
Keywords :
data acquisition; geophysical image processing; geophysical techniques; image resolution; infrared imaging; optical transfer function; remote sensing; HODOYOSI-1 microsatellite; NIR band; NIR sensor; blind superresolution; blue band; blur model; blur properties; camera system; green band; high-resolution images; image acquisition; input image blur kernels; multispectral-band; near infrared band; point spread function; pushbroom sattelite imaging system; red band; remote sensing satellite; subpixel shift; superresolution framework; Cameras; Computational modeling; Image sensors; Sensors; Spatial resolution; HODOYOSHI-1; PSF; Pushbroom; Resolution enhancement; Super-resolution;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-1114-1
DOI :
10.1109/IGARSS.2013.6723821
