Image processing apparatus, image processing method and electronic camera
AssigneeNikon Corporation
InventorAkihiko Utsugi
Life of this patent
Estimating the term…
Abstract
An image processing apparatus includes a clip part and an incremental processing part. The clip part sets a threshold value as an output luminance value of a process object pixel when a luminance value of the process object pixel of an image data having luminance values of a plurality of pixels is less than the threshold value set in advance. The incremental processing part finds and holds an incremental value of the output luminance value relative to the luminance value of the process object pixel, and finds the output luminance value of the process object pixel by subtracting the incremental value from the luminance value when the luminance value of the process object pixel is the threshold value or more.
Claims17
An image processing apparatus comprising:
- a clip part setting a threshold value as an output value of a process object pixel when a luminance value of the process object pixel of an image having a plurality of pixels is less than the threshold value set in advance;
- an incremental calculation part finding an incremental value of the output value of the process object pixel relative to the luminance value of the process object pixel;
- an incremental holding part holding the incremental value found by the incremental calculation part;
- and
- an incremental subtraction part subtracting the incremental value held at the incremental holding part from the luminance value of the process object pixel to find the output value of the process object pixel when the luminance value of the process object pixel is the threshold value or more.
A non-transitory computer-readable medium having computer-executable instructions comprising:
- setting a threshold value as an output value of a process object pixel when a luminance value of the process object pixel of an image having a plurality of pixels is less than the threshold value set in advance;
- finding an incremental value of the output value of the process object pixel relative to the luminance value of the process object pixel;
- holding the found incremental value as a variable;
- and finding the output value of the process object pixel by subtracting the incremental value held as the variable from the luminance value of the process object pixel when the luminance value of the process object pixel is the threshold value or more.
A non-transitory computer-readable medium having computer-executable instructions comprising:
- setting a threshold value as an output value of a process object pixel when a luminance value of the process object pixel of an image having a plurality of pixels is less than the threshold value set in advance;
- finding an incremental value of the output luminance value relative to the luminance value of the process object pixel;
- holding the found incremental value as a variable;
- and
- finding the output value of the process object pixel by subtracting the incremental value held as the variable from the luminance value when the luminance value of the process object pixel is the threshold value or more.
Dependencies are inferred from the claim text.