Image-capturing device, image-capturing method, and image-capturing program

An image-capturing method for capturing an image in an image-capturing device, the method comprising:

• starting exposing first and second photoelectric conversion elements and accumulating electrical charge on the first and second photoelectric conversion elements on the basis of the light;
• ending exposing the first and second photoelectric conversion elements by moving a light-shielding part;
• assessing whether a ratio of an error period relative to an exposure time is greater or less than a threshold value, the error period being a period between a first timing of ending exposing the first photoelectric conversion element and a second timing of ending exposing the second photoelectric conversion element, the first photoelectric conversion element being disposed at a first end in a direction in which the light-shielding part moves, the second photoelectric conversion element being disposed at a second end in the direction in which the light-shielding part moves, the second end being an opposite end to the first end;
• and
• controlling an electronic shutter to start exposing the first photoelectric conversion element at a first exposure-start timing and controlling the electronic shutter to start exposing the second photoelectric conversion element at a second exposure-start timing in order to make a first exposure time of the first photoelectric conversion elements to be closer to a second exposure time of the second photoelectric conversion element when the ratio of the error period relative to the exposure time is greater than the threshold value, than when the ratio of the error period relative to the exposure time is less than the threshold value,
• the electronic shutter control part being configured to control the electronic shutter to make the first exposure time of the first photoelectric conversion element to be less close to the second exposure time of the second photoelectric conversion element when the ratio of the error period relative to the exposure time is less than the threshold value, than when the ratio of the error period relative to the exposure time is greater than the threshold value, the second exposure-start timing being different from the first exposure-start timing when the ratio of the error period relative to the exposure time is less than the threshold value.

A non-transitory computer readable medium storing an image-capturing program, causing an image-capturing device to:

• start exposing first and second photoelectric conversion elements and accumulating electrical charge on the first and second photoelectric conversion elements on the basis of the light;
• end exposing the first and second photoelectric conversion elements to the light by moving a light-shielding part;
• assess whether a ratio of an error period relative to an exposure time is greater or less than a threshold value, the error period being a period between a first timing of ending exposing the first photoelectric conversion element and a second timing of ending exposing the second photoelectric conversion element, the first photoelectric conversion element being disposed at a first end in a direction in which the light-shielding part moves, the second photoelectric conversion element being disposed at a second end in the direction in which the light-shielding part moves, the second end being an opposite end to the first end;
• and
• control an electronic shutter to start exposing the first photoelectric conversion element at a first exposure-start timing and controlling the electronic shutter to start exposing the second photoelectric conversion element at a second exposure-start timing in order to make a first exposure time of the first photoelectric conversion elements to be closer to a second exposure time of the second photoelectric conversion element when the ratio of the error period relative to the exposure time is greater than the threshold value, than when the ratio of the error period relative to the exposure time is less than the threshold value,
• the electronic shutter control part being configured to control the electronic shutter to make the first exposure time of the first photoelectric conversion element to be less close to the second exposure time of the second photoelectric conversion element when the ratio of the error period relative to the exposure time is less than the threshold value, than when the ratio of the error period relative to the exposure time is greater than the threshold value, the second exposure-start timing being different from the first exposure-start timing when the ratio of the error period relative to the exposure time is less than the threshold value.

An image-capturing device, comprising

• an electronic shutter control part being configured to control an electronic shutter and to start exposing first and second photoelectric conversion elements and accumulating electrical charge on the first and second photoelectric conversion elements on the basis of the light;
• a mechanical shutter having a light-shielding part which is configured to be able to shield the first and second photoelectric conversion elements from the light, the mechanical shutter being configured to end exposing the first and second photoelectric conversion elements by moving the light-shielding part;
• and
• an assessing part being configured to assess whether a ratio of an error period relative to an exposure time is greater or less than a threshold value, the error period between a first timing of ending exposing the first photoelectric conversion element and a second timing of ending exposing the second photoelectric conversion element, the first photoelectric conversion element being disposed at a first end in a direction in which the light-shielding part moves, the second photoelectric conversion element being disposed at a second end in the direction in which the light-shielding part moves, the second end being an opposite end to the first end,
• the electronic shutter control part being configured to control the electronic shutter to start exposing the first photoelectric conversion element at a first exposure-start timing and control the electronic shutter to start exposing the second photoelectric conversion element at a second exposure-start timing in order to make a first exposure time of the first photoelectric conversion elements to be closer to a second exposure time of the second photoelectric conversion element when the ratio of the error period relative to the exposure time is greater than the threshold value, than when the ratio of the error period relative to the exposure time is less than the threshold value.