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MTF mapper

5.0 Stars (2)
51 Downloads (This Week)
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Windows Linux



A utility to produce MTF (modulation transfer function, a measure of edge acuity) maps of images. The program will automatically detect dark rectangular objects on light backgrounds, and extract MTF values on all edges. Can help to tune SLR autofocus. See for more usage examples.

MTF mapper Web Site


Other/Nonlisted Topic


BSD License


  • Automatically extracts dark (black) rectangular objects from images, and measures the Modulation Transfer Function (MTF, a measure of image sharpness) across the edges of the rectangles. Measurement is performed using the "slanted edge" method, similar to ISO 12233.
  • Using a special test chart (.pdf supplied), measure the point of sharpest focus relative to a reference point, i.e., measure front- or back-focus in DSLRs
  • Measure the MTF (sharpness) of your lens across the field of view
  • Works with many image formats, including JPEG and various raw formats


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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 5 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Wonderful program. I use this all the time to compare lens resolutions and calibrate them in a scientific way. Really helped with my new Sigma 150-600 and its USB dock to calibrate 4 focal lengths and 4 distances per focal length. You rock, Frans! I'd appreciate a more detailed description of the "annotated" edge photo labels, e.g. yellow "0.10 (0.50)" versus green "0.10 (1.00)" versus blue.

    Posted 07/27/2015
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Generates Edge Spread Functions, Line Spread Functions, MTF/OTF Spatial Frequency plots from slanted edges - and much, much more. No installation required, but ability to work in Command Line necessary for Windows executables. Highly recommended!

    Posted 01/10/2014
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Additional Project Details

Intended Audience

Advanced End Users

User Interface

X Window System (X11), Win32 (MS Windows), Command-line

Programming Language




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