Measuring MTF with wedges: pitfalls and best practices

This paper was given as part of the Electronic Imaging 2017 Autonomous Vehicles and Machine session. When: Monday, January 30, […]

Best practices for using transmissive test charts

  Light Source The most uniform light source available would be an integrating sphere, but these come with considerable size […]

How to get support for your image acquisition hardware

Not all hardware is supported by Imatest or Imatest IT’s acquire image routine. In order to obtain support there are a number […]

Gamma, Chart Contrast and MTF Calculations

A fuller and more up-to-date explanation of gamma, including how to obtain it for slanted-edge MTF calculations can be found […]

Testing a macro lens using Checkerboard and Micro Multi-slide

Imatest’s Checkerboard module is our new flagship module for automated analysis of sharpness, distortion and chromatic aberration from a checkerboard (AKA chessboard) pattern. The big benefit of using the checkerboard is that there are looser framing requirements than with other kinds of test targets. While checkerboard lacks the color and tone analysis provided by SFRplus and eSFR ISO, these features are not available on the high precision chrome on glass substrate, so the checkerboard is the optimal pattern for this test.

Account Administration for Floating Licenses

Floating licenses can remove a lot of headache in keeping track of your licenses by allowing everyone on your team […]

Imatest shuts down intermittently due to video driver problem

Symptom Imatest version 4.2+ intermittently halts.  A MATLAB crash dump file is generated in the user’s %temp% folder. The crash […]

Visual C++ Runtime Library: “The Application has requested the Runtime to terminate in an unusual way. “

Symptoms of problem: Running the library leads to this error:   Root cause of problem: This error is typically the […]

Best Practices for Calling Imatest IT Libraries

Only run in a single thread The MATLAB runtime library does not support multiple threads using the same library. For […]

Java issue with OS X 10.10 Yosemite

Symptoms of the problem: After upgrading OS X to 10.10, Imatest no longer starts Source of the problem: A newer […]

Non-Latin characters appear as boxes in Windows 10

Non-Latin characters in the Imatest UI may appear as boxes in Windows 10, as shown. This is likely caused by […]

Windows 10 Licensing Issue

Nalpeiron-licensed applications running on a machine upgraded from Windows 7/8/8.1 to Windows 10 may require a re-installation of the Visual […]

A module that formerly worked has stopped working

A module that formerly worked but now crashes can often be fixed by removing the section for the module in […]

How to store and retrieve region (ROI) selections

Full up-to-date documentation on region selection and how to use ROI files is now on Saving and Retrieving Regions of […]

Can Imatest IT run multiple instances in Parallel?

Question: Can multiple Imatest IT tests be run at the same time in order to speed up the processing time […]

OS X Update leads to License “Already in Use”

When updating to a newer version of OSX, the licensing daemon may need to be reinstalled. This can be done […]

Invalid MEX File rjpg8c.mexw32

Some users have been getting the following error: Invalid MEX-file ‘C:\Program Files\MATLAB\R2013a\mcr\toolbox\matlab\imagesci\private\rjpg8c.mexw32′ Error in readjpg If you are getting the […]

Troubleshooting errors with video files

The video file formats that are compatible with Imatest vary based on operating system and installed codecs. For a list […]

Selecting a Chart: SFRplus and eSFR ISO

SFRplus and eSFR ISO share many similar features and can be used to perform many similar image quality analyses. However, […]

Gamutvision Installation & Activation Issues

Problems Installing Symptoms An error message such as this is shown on install: Solution 1. Download Imatest-lib.exe into the same folder […]