Image processing apparatus, imaging apparatus, and image processing program

An image processing apparatus comprising:

• an edge emphasizing unit configured to form an edge emphasized image by emphasizing an edge of an input image;
• a range setting unit configured to set a pixel value range of a target pixel value of a target pixel of the input image based on a pixel value difference between the target pixel value and a neighboring pixel value of a neighboring pixel of the input image, and based on an edge emphasized neighboring pixel value of an edge emphasized neighboring pixel of the edge emphasized image, the target pixel being positioned at a target pixel position for being processed, the neighboring pixel being positioned at a neighboring pixel position neighboring the target pixel, the edge emphasized neighboring pixel corresponding to the neighboring pixel position of the input image;
• and
• a ringing control unit configured to restrict an edge emphasized target pixel value of an edge emphasized target pixel of the edge emphasized image in the pixel value range, the edge emphasized target pixel corresponding to the target pixel position of the input image.

An imaging apparatus comprising:

• an image processing apparatus, which comprises:
• an edge emphasizing unit configured to form an edge emphasized image by emphasizing an edge of an input image;
• a range setting unit configured to set a pixel value range of a target pixel value of a target pixel of the input image based on a pixel value difference between the target pixel value and a neighboring pixel value of a neighboring pixel of the input image, and based on an edge emphasized target pixel value of a edge emphasized target pixel of the edge emphasized image, the target pixel being positioned at a target pixel position for being processed, the neighboring pixel being positioned at a neighboring pixel position neighboring the target pixel, the edge emphasized neighboring pixel corresponding to the neighboring pixel position of the input image;
• and
• a ringing control unit configured to restrict a pixel value of the edge emphasized image in the pixel value range.

An image processing apparatus comprising:

• an edge emphasizing unit configured to form an edge emphasized image by emphasizing an edge of an input image;
• a range setting unit configured to set a pixel value range of a target pixel value of a target pixel of the input image based on at least an edge emphasized neighboring pixel value of a neighboring pixel of the target pixel, the edge emphasized neighboring pixel value being obtained after the edge emphasizing of the neighboring pixel;
• and
• a ringing control unit configured to restrict an edge emphasized target pixel value of an edge emphasized target pixel of the edge emphasized image in the pixel value range, the edge emphasized target pixel corresponding to the target pixel position of the input image.

A computer-readable recording medium recording a program which causes a computer execute as an image processing apparatus, the program comprising:

• emphasizing an edge of an input image and forming an edge emphasized image from the input image;
• setting a pixel value range of a target pixel value of a target pixel in the input image based on a pixel value difference between the target pixel value and a neighboring pixel value of a neighboring pixel of the input image, and based on an edge emphasized neighboring pixel value of an edge emphasized neighboring pixel of the edge emphasized image, the target pixel being positioned at a target pixel position for being processed, the neighboring pixel being positioned at a neighboring pixel position neighboring the target pixel, the edge emphasized neighboring pixel corresponding to the neighboring pixel position of the input image;
• and
• restricting an edge emphasized target pixel value of an edge emphasized target pixel of the edge emphasized image in the pixel value range, the edge emphasized target pixel corresponding to the target pixel position of the input image.