Calibration device, caribration method of image output apparatus, program and recording medium

A calibration device for calibrating an imaging apparatus which outputs a visual image in response to inputted image data, on a basis of a plurality of driving test levels and a plurality of gradation measurement data obtained by measuring a plurality of visual images corresponding to the plurality of driving test levels, comprising:

• a first characteristic forming section to interpolate the plurality of gradation measurement data so as to produce a plurality of gradation interpolation data and to form a first characteristic between all driving levels and gradation data on a basis of both of the plurality of gradation measurement data and the plurality of gradation interpolation data;
• a correcting section to correct the first characteristic in the case that the first characteristic does not show a monotonous increase or decrease in the gradation measurement data with increase of the driving levels, and to form a second characteristic so as to show a monotonous increase in gradation data with an increase of the driving level, though the first characteristic has an increasing tendency, but is not the monotonous increase with the increase of the driving level, or so as to show a monotonous decrease in gradation data with the increase of the driving level, though the first characteristic has a decreasing tendency, but is not the monotonous decrease with the increase of the driving level;
• and
• a look-up table making section to make a look-up table showing relation between all driving levels and inputted image data on the basis of the second characteristic so as to maintain predetermined relation between the inputted image data and the outputted visual images.

A calibration device for calibrating an imaging apparatus which outputs a visual image in response to inputted image data, on a basis of a plurality of driving test levels and a plurality of gradation measurement data obtained by measuring a plurality of visual images corresponding to the plurality of driving test levels, comprising;

• a first characteristic forming section to interpolate the plurality of gradation measurement data so as to produce a plurality of gradation interpolation data and to form a first characteristic between all driving levels and gradation data on a basis of both of the plurality of gradation measurement data and the plurality of gradation interpolation data;
• a look-up table making section for making a look-up table showing relation between all driving levels and inputted image data, based on the first characteristic so as to maintain predetermined relation between the inputted image data and the outputted visual images;
• and
• a warning process section for performing a warning process, before making the look-up table,
• when the first characteristic shows an increasing tendency of the gradation measurement data with the increase of the driving level, and shows that the gradation measurement data are not a monotonous increase, or
• when the first characteristic shows a decreasing tendency of the gradation measurement data with the increase of the driving level, and shows that the gradation measurement data are not a monotonous decrease.

A calibration method of an image output apparatus, comprising;

• a gradation measurement data detecting step for reading out gradation measurement data of visual images outputted by an imaging apparatus;
• a first characteristic forming step to interpolate a plurality of the gradation measurement data so as to produce a plurality of gradation interpolation data and to form a first characteristic between all driving levels and gradation data on a basis of both of the plurality of gradation measurement data and the plurality of gradation interpolation data;
• a correcting step to correct the first characteristic in the case that the first characteristic does not show a monotonous increase or decrease in the gradation measurement data with increase of driving levels, and to form a second characteristic so as to show a monotonous increase in gradation data with an increase of the driving level, though the first characteristic has an increasing tendency, but is not the monotonous increase with the increase of the driving level, or so as to show a monotonous decrease in the gradation data with the increase of the driving level, though the first characteristic has a decreasing tendency, but is not the monotonous decrease with the increase of the driving level;
• and
• a look-up table making step to make a look-up table showing relation between all driving levels and inputted image data on the basis of the second characteristic so as to maintain predetermined relation between the inputted image data and the outputted visual images.

A calibration method of an image output apparatus, comprising;

• a gradation measurement data detecting step for reading out gradation measurement data of visual images outputted in response to inputted image data, on a basis of a plurality of driving test levels and a plurality of gradation measurement data obtained by measuring a plurality of visual images corresponding to the plurality of the driving test levels, comprising;
• a first characteristic forming step to interpolate the plurality of the gradation measurement data so as to produce a plurality of gradation interpolation data and to form a first characteristic between all driving levels and gradation data on a basis of both of the plurality of the gradation measurement data and the plurality of gradation interpolation data;
• a look-up table making step for making a look-up table showing the relation between the driving level and a gradation of the inputted image data, based on the first characteristic;
• and
• a warning process step for performing a warning process, before making the look-up table, when the first characteristic shows an increasing tendency of the gradation measurement data with an increase of the driving level, and shows that the gradation measurement data are not a monotonous increase, or when the first characteristic shows a decreasing tendency of the gradation measurement data with the increase of the driving level, and shows that the gradation measurement data are not a monotonous decrease.

A program for a computer to perform a calibration process of an imaging apparatus, on a basis of a plurality of driving test levels and a plurality of gradation measurement data obtained by measuring a plurality of visual images corresponding to the plurality of the driving test levels, comprising;

• a first characteristic forming function to interpolate the plurality of the gradation measurement data so as to produce a plurality of gradation interpolation data and to form a first characteristic between all driving levels and gradation data on a basis of both of the plurality of the gradation measurement data and the plurality of the gradation interpolation data;
• a correcting function to correct the first characteristic in the case that the first characteristic does not show a monotonous increase or decrease in gradation measurement data with increase of driving levels and to form a second characteristic so as to show a monotonous increase in gradation data with an increase of the driving level, though the first characteristic has an increasing tendency, but is not the monotonous increase with the increase of the driving level, or so as to show a monotonous decrease in the gradation data with the increase of the driving level, though the first characteristic has a decreasing tendency, but is not the monotonous decrease with the increase of the driving level;
• and
• a look-up table making function to make a look-up table showing relation between all driving levels and inputted image data on the basis of the second characteristic so as to maintain predetermined relation between the inputted image data and the outputted visual images.

A program for a computer to perform calibration process of an imaging apparatus, on a basis of a plurality of driving test levels and a plurality of gradation measurement data obtained by measuring a plurality of visual images corresponding to the plurality of the driving test levels, comprising;

• a first characteristic forming function to form a first characteristic between all driving levels and gradation data on a basis of both of the plurality of the gradation measurement data and the plurality of the driving levels;
• a look-up table making section to make a look-up table showing relation between all driving levels and inputted image data on the basis of the characteristic so as to maintain predetermined relation between the inputted image data and the outputted visual images;
• and
• a warning process function for performing a warning process, before making the look-up table,
• when the first characteristic shows an increasing tendency of the gradation measurement data with the increase of the driving level, and shows that the gradation measurement data are not a monotonous increase, or when the first characteristic shows a decreasing tendency of the gradation measurement data with the increase of the driving level, and shows that the gradation measurement data are not a monotonous decrease.

A calibration device for calibrating an imaging apparatus which outputs a visual image in response to inputted image data, on a basis of a plurality of driving levels and a plurality of gradation measurement data obtained by measuring a plurality of visual images corresponding to the plurality of driving levels, comprising:

• a first characteristic forming section to form a first characteristic between gradation measurement data and the plurality of the driving levels;
• a correcting section to correct the first characteristic in the case that the first characteristic does not show a monotonous increase or decrease in gradation measurement data with increase of driving levels and to form a second characteristic so as to show a monotonous increase in gradation data with an increase of the driving level, though the first characteristic has an increasing tendency, but is not the monotonous increase with the increase of the driving level, or so as to show a monotonous decrease in gradation data with the increase of the driving level, though the first characteristic has a decreasing tendency, but is not the monotonous decrease with the increase of the driving level;
• and
• a look-up table making section to make a look-up table showing relation between driving levels and inputted image data on the basis of the second characteristic so as to maintain predetermined relation between the inputted image data and the outputted visual images.

A calibration device for calibrating an imaging apparatus which outputs a visual image in response to inputted image data, on a basis of a plurality of driving levels and a plurality of gradation measurement data obtained by measuring a plurality of visual images corresponding to the plurality of driving levels, comprising;

• a first characteristic forming section to form a first characteristic which shows a relation between the driving levels and the gradation measurement data;
• the look-up table making section for making a look-up table showing relation between driving levels and inputted image data, based on the first characteristic so as to maintain predetermined relation between the inputted image data and the outputted visual images;
• and
• a warning process section for performing a warning process, before making the look-up table,
• when the first characteristic shows an increasing tendency of the gradation measurement data with the increase of the driving level, and shows that the gradation measurement data are not a monotonous increase, or when the first characteristic shows a decreasing tendency of the gradation measurement data with the increase of the driving level, and shows that the gradation measurement data are not a monotonous decrease.

A calibration method of an image output apparatus, comprising;

• a gradation measurement data detecting step for reading out gradation measurement data of visual images outputted by an imaging apparatus;
• a first characteristic forming step to form a first characteristic on a basis of both of the plurality of gradation measurement data and the plurality of driving levels;
• a correcting step to correct the first characteristic in the case that the first characteristic does not show a monotonous increase or decrease in the gradation measurement data with increase of driving levels and to form a second characteristic so as to show a monotonous increase in gradation measurement data with an increase of the driving level, though the first characteristic has an increasing tendency, but is not the monotonous increase, with the increase of the driving level, or so as to show a monotonous decrease in the gradation measurement data with the increase of the driving level, though the first characteristic has a decreasing tendency, but is not the monotonous decrease with the increase of the driving level;
• and
• a look-up table making step to make a look-up table showing relation between driving levels and inputted image data on the basis of the second characteristic so as to maintain predetermined relation between the inputted image data and the outputted visual images.

A calibration method of an image output apparatus, comprising;

• a gradation measurement data detecting step for reading out gradation measurement data of visual images outputted in response to inputted image data, on a basis of a plurality of driving levels and a plurality of gradation measurement data obtained by measuring a plurality of visual images corresponding to the plurality of the driving levels, comprising;
• a first characteristic forming step to form a first characteristic on a basis of both of the plurality of gradation measurement data and the plurality of the driving levels;
• a look-up table making step for making a look-up table showing the relation between the driving level and a gradation level of the image data, based on the first characteristic;
• and
• a warning process step for performing a warning process, before making the look-up table,
• when the first characteristic shows an increasing tendency of the gradation measurement data with an increase of the driving level, and shows that the gradation measurement data are not a monotonous increase, or when the first characteristic shows a decreasing tendency of the gradation measurement data with the increase of the driving level, and shows that the gradation measurement data are not a monotonous decrease.