Abstract
Many factors affect space remote sensor imaging, causing image degradation of contrast and resolution
decreasing, which cannot be solved neither by improving resolution of imaging components nor processing of
images. In order to meet the imaging requirement of space remote sensor, image stabilization system should
be included. In this paper, with a combining method of micro-mechanical and digital image stabilization, an
image stabilization system based on DaVinci technology is designed, including imaging and sensing unit,
operating and controlling unit and fast steering mirror unit, using TI TMS320DM6446 as the main processor
of the image stabilization system, which performs the function of focal plane controlling, image acquisition,
motion vector estimating, digital image stabilization operating, fast steering mirror controlling and image
outputting. The workflow is as followings: first, through optical system, ground scene is imaged by imaging
focal planes. Short exposure images acquired by imaging focal plane are transferred as series to the unit of
computing and controlling. Then, inter-frame motion vector is computed from images according to gray
projection algorithm, and employed as inputs with image series to do iterative back projection. In this way the
final picture is obtained. Meanwhile, the control value obtained from the inter-frame motion vector is sent to
the fast steering mirror unit, making compensation to damp vibrations. The results of experiments
demonstrate that the image stabilization system improves the imaging performance of space remote sensor.
