On demand calibration of imaging displays

A method of performing a calibration routine for an imaging display system, the method comprising:

• generating a display test pattern in two or more regions of a screen of a display using a display adapter, the display test pattern in each region of the two or more regions comprising at least one measurement field that comprises a number of pixels less than a total number of pixels of the screen;
• and
• for each region of the two or more regions:
• stepping the at least one measurement field in that region through a sequence of all display driving level (DDL) values;
• generating a plurality of output signals using at least one photosensor of two or more photosensors associated with the display, wherein there is at least one photosensor of the two or more photosensors disposed in each region of the two or more regions of the screen, the plurality of output signals correlating to measurements of the at least one photosensor for that region of the screen for the sequence of all DDL values, wherein the measurements comprise measurements of luminance values for that region of the screen and measurements of color values for that region of the screen, and wherein the two or more photosensors are photoelectric cells with electrical characteristics that vary in accordance with an amount of light that is incident upon the photoelectric cells;
• comparing the plurality of output signals to reference data;
• and
• generating a correction factor for that region based on the comparing.

A non-transitory computer-readable medium having stored thereon a plurality of instructions for performing a method comprising:

• generating a display test pattern in two or more regions of a screen of a display using a display adapter, the display test pattern in each region of the two or more regions comprising at least one measurement field that comprises a number of pixels less than a total number of pixels of the screen;
• and
• for each region of the two or more regions:
• stepping the at least one measurement field in that region through a sequence of all display driving level (DDL) values;
• generating a plurality of output signals using at least one photosensor of two or more photosensors associated with the display, wherein there is at least one photosensor of the two or more photosensors disposed in each region of the two or more regions of the screen, the plurality of output signals correlating to measurements of the at least one photosensor for that region of the screen for the sequence of all DDL values, wherein the measurements comprise measurements of luminance values for that region of the screen and measurements of color values for that region of the screen, and wherein the two or more photosensors are photoelectric cells with electrical characteristics that vary in accordance with an amount of light that is incident upon the photoelectric cells;
• comparing the plurality of output signals to reference data;
• and
• generating a correction factor for that region based on the comparing.