Patent ID: 8454175
Filing Date: 2013-06-04
Classification: H04N

Abstract:
1. A projector, comprising: a projection lens; an image capturing unit; storage system; at least one microprocessor; and one or more programs stored in the storage system and executable by the at least one microprocessor, the one or more programs comprising: an image capturing module operable to capture a first image of an original image projected on a projection area of the projector using the image capturing unit, capture a second image of the projection area after a predetermined interval, and determine whether the projected image of the projection area is a static image or a dynamic image by comparing the first image and the second image; a background determination module operable to divide a brightness value range based on RGB (red, green, blue) channels of pixels of the second image into a plurality of range intervals, search for a target range interval in which contains brightness values of most pixels of the second image from the range intervals, determine an area that is composed of pixels of the target range interval as a background area of the second image, and calculate a first average brightness value of the background area based on the RGB channels, if the projected image is determined as a static image; a brightness calculation module operable to divide the second image into M pixel blocks, and calculate a second average brightness value of each pixel block; an image adjustment module operable to determine whether a color of each pixel block is approximative to a color of the background area by comparing the second average brightness value of each pixel block with the first average brightness value, adjust brightness value of each pixel of the pixel block based on RGB channels if the color of the pixel block is determined as approximative to the color of the background area; and an image projection module operable to generate a projection image using the adjusted image of the second image after each pixel block of the second image is compared, and project the generated projection image on the projection area.