Technique for generating image reproduction
AssigneeScitex Corporation Ltd.
InventorsEphraim A. Carlebach, Moshe Broudo
Life of this patent
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Abstract
A technique employing a plotter having a beam of variable intensity for generating a screened reproduction of an image including the steps of: providing a representation of an original containing information representing the input density values of the image, storing information in a screen memory and exposing a recording medium to record the screened reproduction of the image, the step of exposing including the step of: employing information stored in the screen memory and information representing the input density values of the image to determine non-arithmetically whether and at what intensity a laser is to be operated to expose the recording medium at a given location.
Claims37
A technique employing a plotter having a beam of variable intensity for generating a screened reproduction of an image including the steps of:
- providing a representation of an original containing information representing the input density values of the image;
- storing information in a screen memory;
- and
- exposing a recording medium to record the screened reproduction of the image, the step of exposing including the step of:
- employing information stored in the screen memory and information representing the input density values of the image to determine non-arithmetically whether and at what intensity a laser is to be operated to expose the recording medium at a given location.
Apparatus employing a plotter having a beam of variable intensity for generating a screened reproduction of an image including:
- means for providing a representation of an original containing information representing the input density values of the image;
- means for storing information in a screen memory;
- and
- means for exposing a recording medium to record the screened reproduction of the image, said means for exposing including:
- means for employing information stored in the screen memory and information representing the input density values of the image to determine non-arithmetically whether and at what intensity a laser is to be operated to expose the recording medium at a given location.
A technique employing a plotter having a beam of variable intensity for generating a screened reproduction of an image including the steps of:
- providing a representation of an original containing input density information representing the input density values of the image;
- storing screen memory information in a screen memory;
- and
- exposing a recording medium to record the screened reproduction of the image, the step of exposing including the step of:
- employing the input density information to distinguish between a central region of a printing dot and a peripheral region thereof;
- and
- determining whether and at what intensity a laser is to be operated to expose the recording medium at a given location in the printing dot using the input density information and the screen memory information and applying thereto different criteria for the central region and the peripheral region.
A technique employing a plotter for generating a screened reproduction of an image including the steps of:
- providing a representation of an original containing input density information representing the input density values of the image;
- storing screen memory information in a screen memory;
- and
- exposing a recording medium to record the screened reproduction of the image, the step of exposing including the steps of:
- employing the input density information to distinguish between a central region of a printing dot and a peripheral region thereof;
- and
- determining whether and where a laser exposes the recording medium using the input density information and the screen memory information and applying thereto different criteria for the central region and the peripheral region.
A technique employing a plotter for generating a screened reproduction of an image including the steps of:
- providing a representation of an original containing information representing the input density values of the image;
- providing a plurality of functions which are employed in the construction of a screen dot;
- and
- employing said plurality of functions and said information representing the input density values of the image to produce a screened reproduction of the image,
- wherein at least one of said plurality of functions is employed to determine the operational characteristics of at least another one of said plurality of functions.
A technique employing a plotter for generating a screened reproduction of an image including the steps of:
- providing a representation of an original containing input density information representing the input density values of the image;
- and
- exposing a recording medium to record the screened reproduction of the image, the step of exposing including the steps of:
- compensating for quantization errors at the subdot level to generally eliminate dot offset.
A technique employing a plotter for generating a screened reproduction of an image including the steps of:
- providing a representation of an original containing information representing the input density values of the image;
- and
- exposing a recording medium to record the screened reproduction of the image, the step of exposing including the steps of:
- grouping input densities into groups;
- thresholding a group of input densities to provide a threshold passage indication;
- employing both the threshold passage indication and information derived from the input density to determine how to expose the recording medium at a given location.
Apparatus employing a plotter having a beam of variable intensity for generating a screened reproduction of an image comprising:
- means providing a representation of an original containing input density information representing the input density values of the image;
- a screen memory for storing screen memory information;
- and
- a plotter, exposing a recording medium to record the screened reproduction of the image, the plotter including:
- means for employing the input density information to distinguish between a central region of a printing dot and a peripheral region thereof;
- and
- means for determining whether and at what intensity a laser is to be operated to expose the recording medium at a given location in the printing dot using the input density information and the screen memory information and applying thereto different criteria for the central region and the peripheral region.
Apparatus employing a plotter for generating a screened reproduction of an image comprising:
- means for providing a representation of an original containing input density information representing the input density values of the image;
- a screen memory storing screen memory information;
- and
- a plotter exposing a recording medium to record the screened reproduction of the image, the plotter including:
- means for employing the input density information to distinguish between a central region of a printing dot and a peripheral region thereof;
- and
- means for determining whether and where a laser exposes the recording medium using the input density information and the screen memory information and applying thereto different criteria for the central region and the peripheral region.
Apparatus employing a plotter for generating a screened reproduction of an image comprising:
- means for providing a representation of an original containing information representing the input density values of the image;
- means for providing a plurality of functions which are employed in the construction of a screen dot, wherein at least one of said plurality of functions is employed to determine the operational characteristics of at least another one of said plurality of functions;
- and
- means for employing said plurality of functions and said information representing the input density values of the image to produce a screened reproduction of the image.
Apparatus employing a plotter for generating a screened reproduction of an image including:
- means for providing a representation of an original containing input density information representing the input density values of the image;
- a screen memory storing screen memory information;
- and
- a plotter, exposing a recording medium to record the screened reproduction of the image, the plotter including:
- means for compensating for quantization errors at the subdot level to generally eliminate dot offset.
Apparatus employing a plotter for generating a screened reproduction of an image comprising:
- means for providing a representation of an original containing information representing the input density values of the image;
- and
- a plotter, exposing a recording medium to record the screened reproduction of the image, the plotter comprising:
- means for grouping input densities into groups;
- means for thresholding a group of input densities to provide a threshold passage indication;
- and
- means for employing both the threshold passage indication and information derived from the input density to determine how to expose the recording medium at a given location.
Dependencies are inferred from the claim text.