Image processing apparatus, image processing method, and non-transitory computer-readable storage medium

An image processing apparatus comprising:

• an input unit configured to input image signals which include a first signal and a second signal restricted more in spatial high-frequency component than the first signal;
• an obtaining unit configured to obtain information about the spatial high-frequency component of the first signal which is included in the image signals input by the input unit;
• a generation unit configured to generate a corrected second signal obtained by correcting the spatial high-frequency component of the second signal included in the image signals by using the information about the spatial high-frequency component of the first signal obtained by the obtaining unit;
• and
• an output unit configured to output a processed image signal which includes the corrected second signal generated by the generation unit.

An image processing method comprising:

• inputting image signals which include a first signal and a second signal lower in spatial resolution than the first signal;
• obtaining information about a spatial high-frequency component of the first signal which is included in the input image signals;
• generating an expanded second signal obtained by expanding the spatial resolution of the second signal included in the image signals by using the obtained information about the spatial high-frequency component of the first signal;
• and
• outputting a processed image signal which includes the expanded second signal in the generating.

A computer-readable storage medium storing a program for causing a computer to execute an image processing method comprising:

• inputting image signals which include a first signal and a second signal lower in spatial resolution than the first signal;
• obtaining information about a spatial high-frequency component of the first signal which is included in the input image signals;
• generating an expanded second signal obtained by expanding the spatial resolution of the second signal included in the image signals by using the obtained information about the spatial high-frequency component of the first signal;
• and
• outputting a processed image signal which includes the generated expanded second signal.