Printhead color density correction in printing systems

1. A method for color density correction in a printing system that includes a linehead that jets ink onto a moving print media and an integrated imaging system that captures images of content printed on the moving print media, wherein the linehead includes one or more printheads, the method comprising:

producing one or more pixel data values and a measured density value trace for a printed test block by scanning the test block and averaging pixel data in a print media transport direction;

determining a color and a density of the ink in the printed test block using the pixel data values;

comparing the measured density value trace with a respective reference density value;

determining whether there is a difference between the measured density value trace and a reference density value; and

if there is a difference, adjusting ink laydown for the printhead based on the difference.

2. The method as in claim 1 , further comprising a printhead printing a test block having a known density on the print media.

3. The method as in claim 1 , further comprising determining whether the difference between the measured density value trace and the reference density value equal or exceed a threshold value prior to adjusting ink laydown for the printhead based on the difference.

4. The method as in claim 1 , wherein determining a color and a density of the ink in the printed test block using the pixel data values comprises determining an overlap area between an absorbance spectral response of the test block with a capture response of an image sensor.