Reducing the cross-lab variation of image quality metrics

Abstract As imaging test labs seek to obtain objective performance scores of camera systems, many factors can skew the results.

New 2019 Imatest Licensing – Update Required to Activate

We are migrating to a better, faster licensing platform for our software on January 1, 2019. You may need to […]

Increasing the Repeatability of Your Sharpness Tests

By Robert Sumner With contributions from Ranga Burada, Henry Koren, Brienna Rogers and Norman Koren Consistency is a fundamental aspect of […]

Imatest does not start, unable to read MAT-file

If upon opening Imatest you get something like this:   Error: Error using load Unable to read MAT-file C:\ProgramData\Imatest\mcr_cache\5.0\Master\mcrCache9.2\imates0\.matlab\matlabprefs.mat. File […]

Undefined variable “py” or class “py.model.Message”.

With the addition of python routines in Imatest 5.0, several components require a working python installation. When some installation problems […]

High-contrast edge-SFR test targets produce invalid MTF results

The obsolete ISO 12233:2000 standard defines a resolution test target with a high contrast ratio. These are typically produced at […]

Running Imatest With High Sierra

Due to High Sierra’s new file system, old Imatest licenses no longer have the access they need to write properly. […]

How to capture frames from a video stream or RTSP camera

Imatest is still working on implementing RTSP streaming support and other video stream protocols within the software. In the meantime […]

Megapixel suitability for test charts

Megapixel suitability is based on the analysis of the Modulation Transfer Function (MTF) that is obtained from slanted-edge chart images […]

Lightbox Uniformity Comparison

Summary table – Detailed uniformity measurements – How we made the measurements Lightbox summary table. Many are no longer available […]

Measuring the impact of flare light on dynamic range

Abstract The dynamic range of recent HDR image sensors, defined as the range of exposure between saturation and 0 dB […]

How to convert a color image to grayscale

Sometimes an undemosaiced Bayer raw image gets improperly saved into a BMP or TIFF format that includes color channels that […]

Avoiding reflections on transmissive charts for dynamic range and flare testing

The testing of dynamic range and flare requires a proper test chart and environmental setup to get accurate results.High precision […]

DMX Lighting Control Software

Lights such as the Kino Flo Select 31 LED use a DMX control interface to signal changes of light level […]

Error in Extracting CTF file

Error Message: Error in extracting CTF file to ‘C:\ProgramData\Imatest\mcr_cache\4.5\Master\mcrCache9.0.1\imates0’. Details: ‘Could not set last modified time: C:/ProgramData/Imatest/mcr_cache/4.5/Master/mcrCache9.0.1/imates0/toolbox/imaq/imaqextern/drivers/win64/genicam/genICam_v2_4/redist/Microsoft_VC80_CRT_x86_x64.msi: Broken pipe Solution: […]

Imatest Stops Working – Advanced Troubleshooting

Recovering Mathworks Log Files Please recover this log file and send to The log file name is called “mathworks_<username>.log”. […]

Handling an Lightroom for iPhone RAW DNG file

Adobe DNG converter for windows & mac can be used to re-save iPhone RAW files into supported DNG formats using the following […]

Calculating Field of View (FoV) using distance settings

For accurate calculation of field of view (FoV) from using Imatest’s SFRplus, eSFR ISO, or Checkerboard, modules, it is critical to use […]

Automating CPIQ analysis Using Imatest IT and Python

The Python interface to Imatest IT provides a simple means of invoking Imatest’s tests. This post will show how Imatest […]

The Effects of misregistration on the dead leaves cross-correlation texture blur analysis

This paper was given as part of the Electronic Imaging 2017 Image Quality and System Performance XIV and Digital Photography and […]