Photosensor system and drive control method thereof
First Claim
Patent Images
1. A photosensor system comprising:
- a photosensor array including a plurality of photosensors in a two-dimensional array;
an image reader which reads a subject image at a predetermined reading sensitivity by the photosensor array;
a sensitivity-adjusting reader which causes the subject image to be read by a specific region of the photosensor array to read the subject image at a plurality of different image reading sensitivities at a corresponding plurality of stages for the specific region of the photosensor array;
optimal image reading sensitivity extraction means for extracting an optimal image reading sensitivity suitable for the image reading operation based on a comparison of predetermined measurement amounts which correspond to the plurality of different image reading sensitivities and which relate to an image pattern of the subject image corresponding to the specific region of the photosensor array and read by the sensitivity-adjusting reader; and
reading sensitivity setting means for setting the optimal image reading sensitivity to a reading sensitivity of the image reader.
1 Assignment
0 Petitions
Accused Products
Abstract
A photosensor system performs a sensitivity-adjusting reading operation with respect to a subject image, while simultaneously changing the image reading sensitivity stepwise for each of rows of a photosensor array or for specific rows thereof. The dynamic ranges of the lightness data on the read subject image are checked to see how they are distributed in relation to the image reading sensitivities. On the basis of this distribution, an image reading sensitivity that contributes to an optimal image reading state is extracted as an optimal image reading sensitivity.
-
Citations
31 Claims
-
1. A photosensor system comprising:
-
a photosensor array including a plurality of photosensors in a two-dimensional array;
an image reader which reads a subject image at a predetermined reading sensitivity by the photosensor array;
a sensitivity-adjusting reader which causes the subject image to be read by a specific region of the photosensor array to read the subject image at a plurality of different image reading sensitivities at a corresponding plurality of stages for the specific region of the photosensor array;
optimal image reading sensitivity extraction means for extracting an optimal image reading sensitivity suitable for the image reading operation based on a comparison of predetermined measurement amounts which correspond to the plurality of different image reading sensitivities and which relate to an image pattern of the subject image corresponding to the specific region of the photosensor array and read by the sensitivity-adjusting reader; and
reading sensitivity setting means for setting the optimal image reading sensitivity to a reading sensitivity of the image reader. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A drive control method for a photosensor system including a plurality of photosensors in a two-dimensional array, said method comprising:
-
executing a sensitivity-adjusting reading operation of causing a subject image to be read by a specific region of the photosensor array at a plurality of different image reading sensitivities at a corresponding plurality of stages for the specific region of the photosensor array;
extracting an image reading sensitivity suitable for an image reading operation of the subject image based on a comparison of predetermined measurement amounts which correspond to the plurality of different image reading sensitivities and which relate to an image pattern of the subject image corresponding to the specific region of the photosensor array and read by the sensitivity-adjusting reading operation;
setting the extracted image reading sensitivity as a reading sensitivity in the reading operation of the subject image; and
executing the image reading operation of reading the subject image at the set reading sensitivity. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
Specification