High Resolution Image-stabilizing System by Using Full-digital Processing

Abstract

A high-resolution image-stabilizing system by using only digital processing was developed for camcorders. In this system, a CCD image sensor that has more pixels than a conventional CCD image sensor was adopted to get a large margin for image stabilization and to abolish electronic zooming processing that spoiled picture resolution in a conventional system. The image-stabilizing procedure was divided to two parts : compensation for low frequency image fluctuation and that for remained image fluctuation. The compensation for low frequency image fluctuation was achieved by a readout control of the CCD image sensor according to a motion prediction. On the other hand the compensation for remained image fluctuation was achieved by a readout control of an image memory according to a detected motion vector from images read out from the CCD image sensor. As a result, high image-stabilizing equal to that of a conventional system and maintenance of picture resolution were achieved.