Image processing apparatus, non-transitory computer-readable medium storing computer program, and image processing method
AssigneeOlympus Corporation
InventorShinya Takasumi
Life of this patent
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Abstract
An image processing apparatus includes a smoothing section configured to smooth, for an image after gradation conversion with which gradation display on a monitor becomes appropriate, a signal with a higher Weber ratio, to a signal value, of a quantization error caused by the gradation conversion with higher strength, and a random component addition section configured to add a larger random component to the signal with the higher Weber ratio excluding a neighborhood of a minimum signal value for an image after the smoothing.
Claims6
An image processing apparatus comprising:
- a gradation conversion section configured to convert gradation of an image according to a gradation conversion characteristic with which gradation display on a monitor becomes appropriate;
- a smoothing section configured to smooth a signal with a higher Weber ratio, to a signal value, of a quantization error caused by the gradation conversion with higher strength for an image after the gradation conversion;
- and
- a random component addition section configured to add a larger random component to the signal with the higher Weber ratio excluding a neighborhood of a minimum signal value for an image after the smoothing.
A non-transitory computer-readable medium storing a computer program for causing a computer to execute:
- a gradation conversion step of converting gradation of an image according to a gradation conversion characteristic with which gradation display on a monitor becomes appropriate;
- a smoothing step of smoothing a signal with a higher Weber ratio, to a signal value, of a quantization error caused by the gradation conversion with higher strength for an image after the gradation conversion;
- and
- a random component addition step of adding a larger random component to the signal with the higher Weber ratio excluding a neighborhood of a minimum signal value for an image after the smoothing.
An image processing method comprising:
- a gradation conversion step of converting gradation of an image according to a gradation conversion characteristic with which gradation display on a monitor becomes appropriate;
- a smoothing step of smoothing a signal with a higher Weber ratio, to a signal value, of a quantization error caused by the gradation conversion with higher strength for an image after the gradation conversion;
- and
- a random component addition step of adding a larger random component to the signal with the higher Weber ratio excluding a neighborhood of a minimum signal value for an image after the smoothing.
Dependencies are inferred from the claim text.