Patent ID: 6034795
Filing Date: 2000-03-07
Classification: H04N

Abstract:
An optical colour scanner with a variable line resolution, said scanner collecting information from an original along lines, comprising:a line detector comprising a first and a second colour line sensor arranged substantially in parallel and at a mutual distance which can be measured as a number of gap lines corresponding to a number of lines at the actual line resolution; said colour line sensors registering colour information from lines on the original thereby providing a first and a second colour signal which represent the registered colour information;a plurality of signal paths, at least comprising a first and a second signal path; said first signal path comprising:an analog-to-digital converter connected to receive said first colour signal and to convert this signal into a digital colour signal;a first integer line delay; said integer line delay connected to delay said digital colour signal a first number of lines and providing a first output signal; said second signal path comprising:an analog-to-digital converter connected to receive said second colour signal and to convert said second colour signal into a digital colour signal;a single line delay; andan interpolator connected to receive a one line delayed digital colour signal via said single line delay and connected to receive said digital colour signal; said interpolator forming an interpolated colour signal located between said one line delayed digital colour signal and said digital colour signal, which location is determined by a first interpolation coefficient, said interpolated colour signal is thereby provided as a second output signal;said first number of lines and said first interpolation coefficient being mutually adjusted such that said second output signal is located at a position coincident with said first output signal and such that at least one of said output signals represent registered colour information.