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US 9,754,346 B2Granted
Still image generation device for providing a first and second mixture of an in-focus image and an out-of-focus image
AssigneeFUJIFILM Corporation
InventorYouichi Sawachi
Life of this patent
Estimating the term…
Abstract
A mixture ratio determiner chooses a first mixture ratio set in a case where a blur evaluation value is a reference value or more, and chooses a second mixture ratio set in a case where the blur evaluation value is less than the reference value. The second mixture ratio set has a higher mixture ratio of an in-focus image and a lower mixture ratio of an out-of-focus image than the first mixture ratio set. A mixed image generator produces a plurality of mixed images having a gradually varying mixture ratio, from the in-focus image and the out-of-focus image. A display controller sequentially displays the plurality of mixed images on a monitor in the manner of a moving image.
Claims18
A still image display device comprising:
- a recording medium for recording an in-focus image and an out-of-focus image obtained by imaging an identical object;
- the still image display device performing the functions of:
- reading said in-focus image and said out-of-focus image from said recording medium,
- calculating a blur evaluation value based on a difference between high frequency components contained in said in-focus image and said out-of-focus image,
- evaluating the degree of blurriness of said out-of-focus image relative to said in-focus image by comparing said blur evaluation value with a predetermined reference value,
- choosing a first mixture ratio set in a case where said blur evaluation value is evaluated to be equal to or more than said reference value, and choosing a second mixture ratio set in a case where said blur valuation value is evaluated to be less than said reference value, provided that said first mixture ratio set refers to one set having a gradually varying mixture ratio for mixing said in-focus image and said out-of-focus image, and said second mixture ratio set refers to one set having a higher mixture ratio of said in-focus image and a lower mixture ratio of said out-of-focus image than said first mixture ratio set, and
- generating a plurality of mixed images from said in-focus image and said out-of-focus image read out of said recording medium in accordance with a chosen one of said first and second mixture ratio sets;
- a display that displays said mixed images;
- and
- a display controller that sequentially displays said plurality of mixed images on said display.
7 more elements
An imaging device comprising:
- an imaging optical system having a focus lens shiftable in an optical axis direction;
- an imaging unit that captures an in-focus image and an out-of-focus image of an identical object through said imaging optical system;
- a focus lens driver that shifts said focus lens to said optical axis direction during focus control;
- the imaging device performing the functions of:
- calculating a focus evaluation value in each position of said focus lens during said focus control based on a high frequency component of an image captured by said imaging unit;
- detecting an in-focus position based on said focus evaluation value;
- controlling said focus lens driver to set said focus lens at said in-focus position and an out-of-focus position a predetermined distance away from said in-focus position, so that said imaging unit captures said in-focus image and said out-of-focus image;
- and
- writing to a recording medium a high frequency component in a specific area of said in-focus image and said out-of-focus image as additional information, together with said in-focus image and said out-of-focus image;
- and
- a still image display device including:
- said recording medium;
- the still image display device performing the functions of:
- reading said in-focus image and said out-of-focus image from said recording medium,
- calculating a blur evaluation value based on a difference between said high frequency components contained in said in-focus image and said out-of-focus image,
- evaluating the degree of blurriness of said out-of-focus image relative to said in-focus image by comparing said blur evaluation value with a predetermined reference value,
- choosing a first mixture ratio set in a case where said blur evaluation value is evaluated to be equal to or more than said reference value, and choosing a second mixture ratio set in a case where said blur evaluation value is evaluated to be less than said reference value, provided that said first mixture ratio set refers to one set having a gradually varying mixture ratio for mixing said in-focus image and said out-of-focus image, and said second mixture ratio set refers to one set having a higher mixture ratio of said in-focus image and a lower mixture ratio of said out-of-focus image than said first mixture ratio set, and
- generating a plurality of mixed images from said in-focus image and said out-of-focus image read out of said recording medium in accordance with a chosen one of said first and second mixture ratio sets;
- a display that displays said mixed images;
- and
- a display controller that sequentially displays said plurality of mixed images on said display.
18 more elements
A still image display system comprising:
- A. an imaging device including:
- an imaging optical system having a focus lens shiftable in an optical axis direction;
- an imaging unit that captures an in-focus image and an out-of-focus image of an identical object through said imaging optical system;
- a focus lens driver that shifts said focus lens to said optical axis direction during focus control;
- the image display device performing the functions of:
- calculating a focus evaluation value in each position of said focus lens during said focus control based on a high frequency component of an image captured by said imaging unit;
- detecting an in-focus position based on said focus evaluation value;
- controlling said focus lens driver to set said focus lens at said in-focus position and an out-of-focus position a predetermined distance away from said in-focus position, so that said imaging unit captures said in-focus image and said out-of-focus image;
- and
- writing to a recording medium a high frequency component in a specific area of said in-focus image and said out-of-focus image as additional information, together with said in-focus image and said out-of-focus image;
- and
- B. a still image display device including:
- the still image display device performing the functions of:
- reading out said in-focus image, said out-of-focus image, and said additional information from said recording medium,
- calculating a blur evaluation value based on a difference between said high frequency components included in said additional information,
- evaluating the degree of blurriness of said out-of-focus image relative to said in-focus image by comparing said blur evaluation value with a predetermined reference value,
- choosing a first mixture ratio set in a case where said blur evaluation value is evaluated to be equal to or more than said reference value, and choosing a second mixture ratio set in a case where said blur evaluation value is evaluated to be less than said reference value, provided that said first mixture ratio set refers to one set having a gradually varying mixture ratio for mixing said in-focus image and said out-of-focus image, and said second mixture ratio set refers to one set having a higher mixture ratio of said in-focus image and a lower mixture ratio of said out-of-focus image than said first mixture ratio set, and
- a mixed image generator that generates a plurality of mixed images from said in-focus image and said out-of-focus image read out of said recording medium in accordance with a chosen one of said first and second mixture ratio sets;
- a display that displays said mixed images;
- and
- a display controller that sequentially displays said plurality of mixed images on said display.
18 more elements
A still image display method comprising:
- recording an in-focus image and an out-of-focus image obtained by imaging an identical object;
- a controller configured to perform the functions of:
- reading out said in-focus image and said out-of-focus image from said recording medium,
- calculating a blur evaluation value based on a difference between high frequency components contained in said in-focus image and said out-of-focus image,
- evaluating the degree of blurriness of said out-of-focus image relative to said in-focus image by comparing said blur evaluation value with a predetermined reference value,
- choosing a first mixture ratio set in a case where said blur evaluation value is evaluated to be equal to or more than said reference value, and choosing a second mixture ratio set in a case where said blur evaluation value is evaluated to be less than said reference value, provided that said first mixture ratio set refers to one set having a gradually varying mixture ratio for mixing said in-focus image and said out-of-focus image, and said second mixture ratio set refers to one set having a higher mixture ratio of said in-focus image and a lower mixture ratio of said out-of-focus image than said first mixture ratio set, and
- generating a plurality of mixed images from said in-focus image and said out-of-focus image read out of said recording medium in accordance with a chosen one of said first and second mixture ratio sets;
- displaying said mixed images;
- and
- sequentially displaying said plurality of mixed images on said display.
7 more elements
Dependencies are inferred from the claim text.