Patent ID: 8212916
Filing Date: 2012-07-03
Classification: H04N

Abstract:
1. An image display device that allows a focus assistant display comprising: a luminance-signal extracting unit configured to extract a luminance signal from a video signal of a subject image acquired by an image pickup unit; an amplitude change calculating unit configured to calculate an amplitude change component of the luminance signal extracted by said luminance-signal extracting unit; an edge-signal extracting unit configured to extract an edge signal from the luminance signal extracted by said luminance-signal extracting unit; an amplitude calculating unit configured to calculate an amplitude of the edge signal extracted by said edge-signal extracting unit; an amplitude-ratio calculating unit configured to calculate a ratio of the amplitude of the edge signal to the amplitude change component of the luminance signal; a color conversion unit configured to convert the edge signal to add colors according to the calculation result of said amplitude-ratio calculating unit; an adder unit configured to add the color-converted edge signal and the luminance signal; and a display unit configured to display the video signal to which the color-converted edge signal is added.