Image Processing Device, Image Processing Method, and Image Processing Program

An image-processing apparatus comprising:

• a target-pixel-setting section that sets a target pixel in a target image to be predicted;
• a motion-vector-setting section that sets a motion vector corresponding to an image containing the input target pixel;
• a processing-region-setting section that sets a processing region containing a pixel in the peripheral images whose space positions roughly agree with that of the target pixel;
• a processing-coefficient-setting section that sets a specific processing coefficient based on the motion blur amount corresponding to the motion vector or sets a processing coefficient that corresponds to the motion blur amount and the motion direction that correspond to the motion vector;
• a pixel-value-generating section that generates a pixel value that corresponds to the target pixel by linear combination of a new pixel value for processing generated corresponding to the motion direction from the pixel value corresponding to the pixel in the processing region and the specific processing coefficient set in the processing-coefficient-setting section or by linear combination of the pixel value corresponding to the pixel in the processing region and the processing coefficient set corresponding to the motion blur amount and the motion direction;
• and
• an image-moving section that moves a processed image containing the pixel value generated in the pixel-value-generating section along a counter vector of the input motion vector.

An image-processing method comprising:

• a motion-vector-setting step of setting a first motion vector in units of pixel in a target image;
• an exposure-time-ratio-setting step of setting in units of image all exposure time ratio that is a ratio between a time interval of the target image and a period of exposure time;
• a motion-blur-amount-setting step of setting a motion blur amount in units of pixel based on the first motion vector set in units of pixel in the motion-vector-setting step and the exposure time ratio set in the exposure-time-ratio-setting step;
• a processing-region-setting step of setting a processing region corresponding to a target pixel in the target image based on the motion blur amount set in the motion-blur-amount-setting step and a motion direction corresponding to the first motion vector;
• a processing-coefficient-setting step of setting a specific processing coefficient based on the motion blur amount set in the motion-blur-amount-setting step or setting a processing coefficient that corresponds to the motion blur amount and the motion direction of the target pixel;
• a pixel-value-generating step of generating a pixel value that corresponds to the target pixel by linear combination of a new pixel value for processing generated corresponding to the motion direction from the pixel value corresponding to the pixel in the processing region and the specific processing coefficient set in the processing-coefficient-setting step or by linear combination of the pixel value corresponding to the pixel in the processing region and the processing coefficient set corresponding to the motion blur amount and the motion direction;
• a motion-blur-adding step of adding a motion blur in units of pixel to an image containing the pixel value generated by the pixel-value-generating step based on an input second motion vector and the first motion vector;
• and
• an image-moving step of moving the motion-blur-added target image, to which a motion blur is added in the motion-blur-adding step, along a counter vector of the second motion vector.

An image-processing method comprising:

• a target-pixel-setting step o1 setting a target pixel in a target image to be predicted;
• a motion-vector-setting step of setting a motion vector corresponding to an image containing the input target pixel;
• a processing-region-setting step of setting a processing region containing a pixel in the peripheral images whose space positions roughy agree with that of the target pixel;
• a processing-coefficient-setting step of setting a specific processing coefficient based on the motion blur amount corresponding to the motion vector or setting a processing coefficient that corresponds to the motion blur amount and the motion direction that correspond to the motion vector;
• a pixel-value-generating step of generating a pixel value that corresponds to the target pixel by linear combination of a new pixel value or processing generated corresponding to the motion direction from the pixel value corresponding to the pixel in the processing region and the specific processing coefficient set in the processing-coefficient-setting step or by linear combination of the pixel value corresponding to the pixel in the processing region and the processing coefficient set corresponding to the notion blur amount and the motion direction;
• and
• an image-moving step of moving a processed image containing the pixel value generated in the pixel-value-generating step along a counter vector of the input motion vector.

An image-processing program that allows a computer to perform:

• a motion-vector-setting step of setting a first motion vector in units of pixel in a target image;
• an exposure-time-ratio-setting step of setting in units of image an exposure with ratio that is a ratio between a time interval of the target image and a period of exposure time;
• a motion-blur-amount-setting step of setting a motion blur amount in units of pixel based on the first motion vector set in units of pixel in the motion-vector-setting step and the exposure time ratio set in the exposure-time-ratio-setting step;
• a processing-region-setting step of setting a processing region corresponding to a target pixel in the target image based on the motion blur amount se in the motion-blur-amount-setting step and a motion direction corresponding to the first motion vector;
• a processing-coefficient-setting step of setting a specific processing coefficient based on the motion blur amount set in the motion-blur-amount-setting step or setting a processing coefficient that corresponds to the motion blur amount and the mot on direction of the target pixel;
• a pixel-value-generating step of generating a pixel value that corresponds to the target pixel by linear combination of a new pixel value for processing generated corresponding to the motion direction from the pixel value corresponding to the pixel in the processing region and the specific processing coefficient set in the processing-coefficient-setting step or by linear combination of the pixel value corresponding to the pixel in the processing region and the processing coefficient set corresponding to the motion blur amount and the motion direction;
• a motion-blur-adding step of adding a motion blur in units of pixel to an mage containing the pixel value generated by the pixel-value-generating step based on an input second motion vector and the first motion vector;
• and
• an image-moving step of moving the motion-blur-added target image, to which a motion blur is added in the motion-blur-adding step, along a counter vector of the second motion vector.

An image-processing program that allows a computer to perform:

• a target-pixel-setting step of setting a target pixel in a target image to be predicted;
• a motion-vector-setting step of setting a motion vector corresponding to an image containing the input target pixel;
• a processing-region-setting step of setting a processing region containing a pixel in the peripheral images whose space positions roughly agree with that of the target pixel;
• a processing-coefficient-setting step of setting a specific processing coefficient based on the motion blur amount corresponding to the motion vector or setting a processing coefficient that corresponds to the motion blur amount and the motion direction that correspond to the motion vector;
• a pixel-value-generating step of generating a pixel value that corresponds to the target pixel by linear combination of a new pixel value for processing generated corresponding to the motion direction from the pixel value corresponding to the pixel in the processing region and the specific processing coefficient set in the processing-coefficient-setting step or by linear combination of the pixel value corresponding to the pixel in the processing region and the processing coefficient set corresponding to the motion blur amount and the motion direction;
• and
• an image-moving step of moving a processed image containing the pixel value generated in the pixel-value-generating step along a counter vector of the input motion vector.