RAPID AUTO-FOCUSING APPARATUS AND METHOD

摘要

Disclosed herein is an auto-focusing method by a rapid auto-focusing apparatus, including: extracting, by an image loading module, an input image for auto-focusing; transforming, by an image transforming module, the extracted input image into a binary image; calculating, by a focus value calculating module, a focusing degree at each lens position by performing a binary operation on some or all of the pixels of the binary image; and receiving, by a lens moving module, a control value for the calculated focusing degree to move a lens, thereby positioning the lens at an accurate focus position.

主权项

1. A rapid auto-focusing apparatus comprising:
an image loading module extracting an input image for auto-focusing; an image transforming module transforming the input image input through the image loading module into a binary image; a focus value calculating module calculating a focusing degree at each lens position by performing a binary operation on some or all of the pixels of the binary image transformed by the image transforming module; a lens moving module receiving a control value calculated by the focus value calculating module to move a lens forward and backward, thereby allowing the lens to be positioned at a predetermined focus position; and a controlling unit generating a control signal controlling the image loading module, the image transforming module, the focus value calculating module, and the lens moving module to position the lens at an accurate focus position.