| 摘要 |
The third image signal is generated by multiplying the second image signal constituted by low-frequency components by K. If the fourth image signal obtained by adding the third image signal to the first image signal constituted by high-frequency components falls within a predetermined range, the third image signal is output, whereas if the fourth image signal includes a portion exceeding the range, an image signal obtained by correcting the third image signal is output. A composition signal of the output image signal and the first image signal is generated. The fifth image signal is generated by multiplying the third image signal by a correction amount γ of the third image signal. As a sub-frame of interest, either the composition signal or the fifth image signal is output.
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