Image recording apparatus

An image recording apparatus for processing, for color correction, image signals from an image signal source of a host computer and for forming image record signals to record an image on an image recording medium, said image recording apparatus comprising:

• color correction means including first color correction means coupled to receive image signals from said image signal source, second color correction means coupled to receive image signals from said first color correction means, and third color correction means coupled to receive image signals from said second color correction means, said second color correction means comprising a three-dimensional look-up table addressed with n higher-order bits of each color and an interpolation unit responsive to m lower-order bits of each color, an output signal of said first color correction means being previously compressed to (2.sup.n+m - 2.sup.m) gradations;
• adjusting means provided for at least said first color correction means and said third color correction means;
• and
• adjustment information entering means for providing adjustment information to said adjusting means.

An image recording apparatus for processing, for color correction, image signals from an image signal source of a host computer and for forming image record signals to record an image on an image recording medium, said image recording apparatus comprising:

• color correction means including first color correction means coupled to receive image signals from said image signal source, second color correction means coupled to receive image signals from said first color correction means, and third color correction means coupled to receive image signals from said second color correction means;
• adjusting means provided for at least said first color correction means and said third color correction means;
• adjustment information entering means for providing adjustment information to said adjusting means;
• means for bypassing said second color correction means;
• and
• selecting means for activating said bypassing means,
• wherein said second color correction means comprises a three-dimensional look-up table addressed with n higher-order bits of each color and an interpolation unit responsive to m lower-order bits of each color, and wherein an output signal of said first color correction means is previously compressed to (2.sup.n+m - 2.sup.m) gradations.

An image recording apparatus for processing, for color correction, image signals from an image signal source of a host computer and for forming image record signals to record an image on an image recording medium, said image recording apparatus comprising:

• color correction means including first color correction means coupled to receive image signals from said image signal source, second color correction means coupled to receive image signals from said first color correction means, and third color correction means coupled to receive image signals from said second color correction means;
• adjusting means provided for at least said first color correction means and said third color correction means;
• adjustment information entering means for providing adjustment information to said adjusting means;
• means for bypassing said second color correction means;
• and
• selecting means for activating said bypassing means,
• wherein said adjustment information entering means enters instructions from an operation panel of said image recording apparatus and said image signal source, and includes the sum of a quantity of adjustment by said operation panel and a quantity of adjustment by an instruction from said image signal source.

An image recording apparatus for processing, for color correction, image signals from an image signal source of a host computer and for forming image record signals to record an image on an image recording medium, said image recording apparatus comprising:

• color correction means including first color correction means coupled to receive image signals from said image signal source, second color correction means coupled to receive image signals from said first color correction means, and third color correction means coupled to receive image signals from said second color correction means;
• adjusting means provided for at least said first color correction means and said third color correction means;
• adjustment information entering means for providing adjustment information to said adjusting means;
• means for bypassing said second color correction means;
• and
• selecting means for activating said bypassing means,
• said third color correction means comprises look-up tables for the respective colors,
• wherein an input of said third color correction means has a larger number of gradations than an output of said first color correction means, an output of said first color correction means is constantly normalized to a maximum number of gradations when said bypassing means is activated, and said look-up table for said third color correction means is adjusted for normalized gradations, thereby preventing drop-out of gradations.

An image recording apparatus for processing, for color correction, image signals from an image signal source of a host computer and for forming image record signals to record an image on an image recording medium, said image recording apparatus comprising:

• color correction means including first color correction means coupled to receive image signals from said image signal source, second color correction means coupled to receive image signals from said first color correction means, and third color correction means coupled to receive image signals from said second color correction means;
• adjusting means provided for at least said first color correction means and said third color correction means;
• and
• adjustment information entering means for providing adjustment information to said adjusting means, said adjustment information entering means entering instructions from an operation panel of said image recording apparatus and said image signal source, including the sum of a quantity of adjustment by said operation panel and a quantity of adjustment by an instruction from said image signal source.

An image recording apparatus for processing, for color correction, image signals from an image signal source of a host computer and for forming image record signals to record an image on an image recording medium, said image recording apparatus comprising:

• color correction means including first color correction means coupled to receive image signals from said image signal source, and second color correction means coupled to receive image signals from said first color correction means, said second color correction means comprising a three-dimensional look-up table addressed with n higher-order bits of each color and an interpolation unit responsive to m lower-order bits of each color, an output signal of said first color correction means being previously compressed to (2.sup.n+m - 2.sup.m) gradations;
• adjusting means provided for at least said first color correction means and said third color correction means;
• and
• adjustment information entering means for providing adjustment information to said adjusting means.

An image recording apparatus for processing, for color correction, image signals from an image signal source of a host computer and for forming image record signals to display an image on a monitor, said image recording apparatus comprising:

• color correction means including first color correction means coupled to receive image signals from said image signal source, second color correction means coupled to receive image signals from said first color correction means, and third color correction means coupled to receive image signals from said second color correction means, said second color correction means comprising a three-dimensional look-up table addressed with n higher-order bits of each color and an interpolation unit responsive to m lower-order bits of each color, an output signal of said first color correction means being previously compressed to (2.sup.n+m - 2.sup.m) gradations;
• adjusting means provided for at least said first color correction means and said third color correction means;
• and
• adjustment information entering means for providing adjustment information to said adjusting means.