Patent ID: 6078357
Filing Date: 2000-06-20
Classification: H04N

Abstract:
An image mixing circuit for mixing a plurality of image signals of different exposure levels comprising:an image device for producing at least first and second image signals of different exposure levels;a color separation circuit for separating the first image signal into a first luminance signal and a first color signal, and for separating the second image signal into a second luminance signal and a second color signal;a control signal generation circuit for generating a control signal necessary for image mixing from at least one of the first and second image signals;a luminance signal mixing circuit for mixing the first and second luminance signals according to the control signal; anda color signal mixing circuit for mixing the first and second color signals according to the control signal;wherein said luminance signal mixing circuit controls a weight of mixing the first and second luminance signals, and wherein said color signal mixing circuit controls a weight of mixing the first and second color signals;wherein said imaging device generates an image signal in which a color signal is superposed on a luminance signal as a modulation component;wherein said color separation circuit comprises a normalizing circuit for normalizing the color signal according to the luminance signal; andwherein said color signal mixing circuit comprises a weighting circuit for weighting the color signal according to the luminance signal afer the color signal mixing operation is completed.