Image processing device, image processing method, image processing program, and integrated circuit

An image processing device, comprising:

• a gain calculation portion that calculates a gain for conversion of an input signal that is made from pixel data that forms an image;
• a multiplication portion that multiplies the gain with the input signal to obtain a converted signal;
• a noise reduction degree determining portion that determines a noise reduction degree for the converted signal based on the gain;
• and
• a noise reducing portion that executes noise reduction processing on the converted signal based on the noise reduction degree.

An image processing method, which is performed using a processor, the image processing method comprising:

• performing grayscale conversion on an input signal that is made from pixel data that forms an image to obtain a converted signal;
• determining a noise reduction degree for the converted signal based on the input signal and the converted signal;
• and
• executing noise reduction processing on the converted signal based on the noise reduction degree.

A non-transitory computer-readable medium having stored thereon an image processing program, wherein, when executed, the image processing program causes a computer to perform a method comprising:

• performing grayscale conversion on an input signal that is made from pixel data that forms an image to obtain a converted signal;
• determining a noise reduction degree for the converted signal based on the input signal and the converted signal;
• and
• executing noise reduction processing on the converted signal based on the noise reduction degree.

An integrated circuit comprising:

• a grayscale conversion portion that performs grayscale conversion on an input signal that is made from pixel data that forms an image to obtain a converted signal;
• a noise reduction degree determining portion that determines a noise reduction degree for the converted signal based on the input signal and the converted signal;
• and
• a noise reducing portion that executes noise reduction processing on the converted signal based on the noise reduction degree.