Apparatus and techniques for processing of data such as color images

• US 5,615,282 A
• Filed: 03/25/1994
• Issued: 03/25/1997
• Est. Priority Date: 02/05/1990
• Status: Expired due to Fees

• Current Assignee: CREO Company Limited
• Original Assignee: Scitex Corporation Ltd. (Suny Cellular Communication Ltd.)
• Inventors: Baron, Eliezer, Broudo, Moshe, Pluda, Yacov, Spiegel, Ehud, Lavie, Reuven, Bresler, Yoav
• Primary Examiner(s): MANCUSO, JOSEPH
• Assistant Examiner(s): Shalwala, Bipin
• Application Number:
  US08/218,307
• Time in Patent Office: 1,096 Days
• Field of Search: 382/41, 382/49, 382/162, 382/167, 382/276, 358/450, 358/523, 348/584, 348/589, 348/599, 348/600, 395/135
• US Class Current: 382/167
• CPC Class Codes: G06F 17/15 Correlation function computation including computation of convolution operations arithmetic circuits for sum of products per se, e.g. multiply-accumulators G06F7/5443; digital filters, e.g. FIR, IIR, adaptive filters H03H17/00
• CPC Class Codes: G06K 15/02 using printers
• CPC Class Codes: G06K 2215/0037 depending on an output condition, e.g. size, resolution
• CPC Class Codes: G06K 2215/0094 Colour printing
• CPC Class Codes: G06T 5/20 using local operators
• CPC Class Codes: H04N 1/52 Circuits or arrangements for halftone screening
• CPC Class Codes: H04N 1/6033 using test pattern analysis H04N1/6055 takes precedence

Abstract

A method and apparatus for adapting a digital representation of a first color image for output representation by an output device having spatial and color characteristics are disclosed. The apparatus includes apparatus for modifying the spatial characteristics of the digital representation of the first color image and the color characteristics of the first color image to correspond to the spatial and color characteristics of the output device such that, in an output representation, the color characteristics of the first color image would be substantially preserved. The method includes the step of modifying the spatial characteristics of the digital representation of the first color image and the color characteristics of the first color image to correspond to the spatial and color characteristics of the output device such that, in an output representation, the color characteristics of the first color image would be substantially preserved.

Claims

1. Apparatus for processing an image characterized by at least first and second pluralities of color characteristics arranged in at least corresponding first and second formats comprising a format processing unit for receiving said at least first and second pluralities of color characteristics and producing therefrom a third plurality of color characteristics arranged in a third format, said format processing unit comprising:

means for converting the format of said first plurality of color characteristics arranged in said first format into said third format;

means for converting the format of said first plurality of color characteristics arranged in said first format into a fourth format;

means for converting the format of said second plurality of color characteristics arranged in said second format into said fourth format;

means for merging said first and second pluralities of color characteristics in said fourth format, thereby producing a fourth plurality of color characteristics in said fourth format;

means for converting the format of said fourth plurality of color characteristics into said third format; and

means for merging said first and fourth pluralities of color characteristics in said third format, thereby providing said third plurality of color characteristics in said third format.

2. Apparatus according to claim 1 and wherein said fourth format and said second format are the same format.

3. Apparatus according to claim 1, comprising a color processing unit for receiving said third plurality of color characteristic and producing therefrom a fifth plurality of color characteristics.

4. Apparatus according to claim 1 wherein said merging is determined based on control information included in one of said at least first and second formats.

5. Apparatus according to claim 3 wherein said third format also includes an indication readable by said color processing unit and wherein said color processing unit is operative to execute a predetermined color transformation in accordance with said indication.

6. A method for processing an image characterized by it least first and second pluralities of color characteristics arranged in at least corresponding first and second formats, the method comprising the steps of:

receiving said at least first and second pluralities of color characteristics; and

producing therefrom a third plurality of color characteristics arranged in a third format, said step of producing comprising the steps of;

converting the format of said first plurality of color characteristics arranged in said first format into said third format;

converting the format of said first plurality of color characteristics arranged in said first format into a fourth format;

converting the format of said second plurality of color characteristics arranged in said second format into said fourth format;

merging said first and second pluralities of color characteristics in said fourth format, thereby producing a fourth plurality of color characteristics in said fourth format;

converting the format of said fourth plurality of color characteristics into said third format; and

merging said first and fourth pluralities of color characteristics in said third format, thereby providing said third plurality of color characteristics in said third format.

7. A method according to claim 6 wherein said fourth format and said second format are the same format.

8. A method according to claim 6, comprising receiving said third plurality of color characteristic and producing therefrom a fifth plurality of color characteristics arranged in said third format.

9. A method according to claim 6, wherein said merging is determined based on control information included in one of said at least first and second formats.

10. A method according to claim 8 wherein said third format also includes an indication readable by said color processing unit and wherein said color processing unit is operative to execute a predetermined color transformation in accordance with said indication.