Color correcting method

A color correcting method for converting input image data (Iin) depending on printing conditions into colorimetric data (Icv) with a printing profile (26), thereafter converting the colorimetric data into image data (Iout) depending on proofer conditions with a proofer profile (36), and outputting a proof (HC) from a proofer (16) based on the image data to simulate color reproduction accuracy, comprising the steps of:

• converting image data (Ich) depending on the printing conditions to output a printing color chart (Cpa) colorimetrically measured when the printing profile is produced, into image data depending on the proofer conditions via said printing profile and said proofer profile;
• supplying said image data to said proofer to output a proof color chart (Cpa′) from said proofer;
• colorimetrically measuring said proof color chart to generate a printing color reproduction profile (26′) to be simulated by said proofer;
• determining differences (Δ) between said printing color reproduction profile and said printing profile for an entire color space which is a color space of colorimetric data (S17);
• correcting said colorimetric data with the determined differences;
• and
• generating a corrected printing profile from said corrected colorimetric data.

A color correcting method for converting input image data (Iin) depending on printing conditions into colorimetric data (Icv) with a printing profile (26), thereafter converting the colorimetric data into image data (Iout) depending on proofer conditions with a proofer profile (36), and outputting a proof (HC) from a proofer (16) based on the image data to simulate color reproduction accuracy, comprising the steps of:

• converting image data (Ich) depending on the printing conditions to output a printing color chart (Cpa) colorimetrically measured when the printing profile is produced, into image data depending on the proofer conditions via said printing profile and said proofer profile;
• supplying said image data to said proofer to output a proof color data (Cpa′) from said proofer;
• colorimetrically measuring said proof color chart to determine colorimetric data;
• determining differences (Δ) between colorimetric data of said printing color chart and the colorimetric data of said printing color chart for an entire color space of said input image data depending on the printing conditions (S16);
• correcting said colorimetric data with the determined differences;
• and
• generating a corrected printing profile from said corrected colorimetric data.