Increasing the spatial frequency of object details generally has what effect on MTF?

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Multiple Choice

Increasing the spatial frequency of object details generally has what effect on MTF?

Explanation:
The main idea is that a system’s ability to reproduce contrast drops as details become finer. The MTF shows how much image contrast is preserved at different spatial frequencies. At low spatial frequencies (coarser details), the system can transmit most of the contrast, often near its maximum. As you increase spatial frequency (finer details), blur, diffraction, and finite sampling reduce how well those rapid intensity changes are conveyed, so the transferred contrast falls. That’s why MTF decreases with higher spatial frequency. It isn’t expected to rise, stay exactly 1, or be undefined simply because details are finer.

The main idea is that a system’s ability to reproduce contrast drops as details become finer. The MTF shows how much image contrast is preserved at different spatial frequencies. At low spatial frequencies (coarser details), the system can transmit most of the contrast, often near its maximum. As you increase spatial frequency (finer details), blur, diffraction, and finite sampling reduce how well those rapid intensity changes are conveyed, so the transferred contrast falls. That’s why MTF decreases with higher spatial frequency. It isn’t expected to rise, stay exactly 1, or be undefined simply because details are finer.

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