Image processing apparatus and image pickup apparatus using the same

An image pickup apparatus comprising:

• an image pickup system that acquires an object image as an input image;
• and
• image restoration processing unit configured to generate a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of the image pickup system,
• wherein the image restoration filter is a filter that performs restoration so that when an object is a white point light source, a difference between spectra of two color components in the restored image is made smaller than a difference between spectra of the two color components in the input image.

An image processing method comprising:

• a step of acquiring an input image;
• and
• a step of generating a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of an image pickup system that is used to acquire the input image,
• wherein the image restoration filter is a filter that performs restoration so that when an object is a white point light source, a difference between spectra of two color components in the restored image is made smaller than a difference between spectra of the two color components in the input image.

An image processing apparatus comprising:

• image acquiring unit configured to acquire an input image;
• and
• image restoration processing unit configured to generate a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of an image pickup system that is used to form an object image as the input image,
• wherein the image restoration filter is a filter that performs restoration so that a difference between absolute values of a first transfer function of a first color component and a second transfer function of a second color component after restoration is smaller than a difference between absolute values of the first transfer function and the second transfer function before restoration.

An image processing apparatus comprising:

• image acquiring unit to acquire an input image;
• and
• image restoration processing unit configured to generate a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of an image pickup system that is used to form an object image as the input image,
• wherein the image restoration filter is generated on the basis of the transfer function of the image pickup system and a correction transfer function that has been corrected so that a difference between absolute values of a first transfer function of a first color component and a second transfer function of a second color component after restoration is smaller than a difference between absolute values of the first transfer function and the second transfer function before restoration.

A computer-readable non-transitory medium having instructions that, when executed by a processor, cause the processor to perform operations comprising:

• acquiring an input image;
• and generating a restored image by calculating the input image and an image restoration filter,
• the image restoration filter being based on a transfer function of an image pickup system that is used to form an object image as the input image,
• wherein the image restoration filter is filter that performs restoration so that a difference between absolute values of a first transfer function of a first color component and a second transfer function of a second color component after restoration is smaller than a difference between absolute values of the first transfer function-and the second transfer function before restoration.

An image pickup apparatus comprising:

• an image pickup system that acquires an object image as an input image;
• and
• image restoration processing unit configured to generate a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of the image pickup system,
• wherein the image restoration filter is a filter that performs restoration so that a difference between absolute values of a first transfer function of a first color component and a second transfer function of a second color component after restoration is smaller than a difference between absolute values of the first transfer function and the second transfer function before restoration.

An image processing method comprising:

• a step of acquiring an input image;
• and
• a step of generating a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of an image pickup system that is used to form an object image as the input image,
• wherein the image restoration filter is a filter that performs restoration so that a difference between absolute values of a first transfer function of a first color component and a second transfer function of a second color component after restoration is smaller than a difference between absolute values of the first transfer function and the second transfer function before restoration.

A computer-readable non-transitory medium having instructions that, when executed by a processor, cause the processor to perform operations comprising:

• acquiring an input image;
• and
• generating a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of an image pickup system that is used to form an object image as the input image,
• wherein the image restoration filter is generated on the basis of the transfer function of the image pickup system and a correction transfer function that has been corrected so that a difference between absolute values of a first transfer function of a first color component and a second transfer function of a second color component after restoration is smaller than a difference between absolute values of the first transfer function and the second transfer function before restoration.

An image pickup apparatus comprising:

• an image pickup system that acquires an object image as an input image;
• and
• image restoration processing unit configured to generate a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of the image pickup system,
• wherein the image restoration filter is generated on the basis of the transfer function of the image pickup system and a correction transfer function that has been corrected so that a difference between absolute values of a first transfer function of a first color component and a second transfer function of a second color component after restoration is smaller than a difference between absolute values of the first transfer function and the second transfer function before restoration.

An image processing method comprising:

• a step of acquiring an input image;
• and
• a step of generating a restored image by calculating the input image and an image restoration filter, the image restoration filter being based on a transfer function of an image pickup system that is used to form an object image as the input image,
• wherein the image restoration filter is generated on the basis of the transfer function of the image pickup system and a correction transfer function that has been corrected so that a difference between absolute values of a first transfer function of a first color component and a second transfer function of a second color component after restoration is smaller than a difference between absolute values of the first transfer function and the second transfer function before restoration.