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Frans van den Bergh
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View MTF (SFR) curves in the GUI
The Easter bunny has delivered. That most elusive of egg-laying mammals has brought you a new GUI feature, which finally completes the feature set I originally envisioned for MTF Mapper. To visualize the MTF curve (or SFR curve, if you prefer), load up any ...

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First attempt at determining what the Nikon D40 anti-aliasing (AA) filter does to your image
Update:  Please read follow-up  article  to this one. It would appear that the same question pops up every time a new higher resolution sensor is announced: "Will my lenses be sharp enough for an X megapixel sensor?" I was curious to see exactly what happen...

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Focus peak measurement with MTF Mapper: Description and Validation
It is a truth universally acknowledged that a single man in possession of  a large aperture lens must capture images with as shallow a depth of field as he can manage. (Jane, please forgive me ...). All kidding aside, the downside to employing a shallow dep...

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Automatic chart orientation estimation: validation experiment
In my previous post I mentioned that it is rather important to ensure that your MTF Mapper test chart is parallel to your sensor (or that the chart is perpendicular to the camera's optical axis, which is almost the same thing) to ensure that you do not conf...

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Limitations of using single-shot planar targets to perform automatic camera calibration
When you are trying to measure the performance of your system across the entire field, it is rather important to ensure that your test chart is parallel to your sensor. If you are not careful, then a slight tilt in your test chart could look very much like ...

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