MTF mapper

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 http://mtfmapper.blogspot.com for more usage examples.

Features

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
Provides feedback on chart orientation (for some chart types) helping you to correctly set up the chart relative to the camera sensor
Use the GUI to visualize and compare MTF/SFR curves between different images, or different edges within the same image

Project Samples

Edges of rectangular objects annotated automatically with MTF50 value (quality indication in colour), MTF/SFR curves of three different edges compared in pop-up window.

Sharpness measured as a function of distance on a 45-degree chart. Green curve represents MTF50.

MTF50 values (line pairs per mm) visualized as a 3d surface, across the field of view. Simulated lens has visible tilt.

Lens style MTF chart showing contrast across the field at user-selectable resolutions

MTF50 values (line pairs per mm) visualized across the field of view. Simulated lens has visible tilt.

Project Activity

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License

BSD License

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MTF mapper Web Site

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kevinyou278 Posted 2021-08-09

a wonderful software. thanks for your share！
drachenlaeufer Posted 2018-10-31

MTF Mapper is a really helpfull tool to check optical performace of lens-sensor-systems. Also the background information provided are going deep into the topic.
edozier Posted 2015-07-27

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.
jackho9 Posted 2014-01-10

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!