Documentation – Current v24.1

Imatest 24.1 — Release Notes

Current Documentation
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General Improvements

Image Information Metrics — from slanted edges

The image information metrics have expanded from the metrics that were available in releases 23.1 and 23.2. The earlier releases included edge-based information capacity and noise image-based information capacity, the latter which uses the calculated noise power spectrum (NPS) as part of the information capacity equation. The NPS also enables additional metrics which are being launched in 24.1 Beta.

  • SNRi and Edge SNRi  (Independent Observer Signal-to-Noise Ratios). Measures of the detectability of objects and edges.
  • Matched filter design  Procedure for designing electronic filters that optimize object and edge detection metrics, SNRi and Edge SNRi.
  • Slanted edge SFR interpolated binning method for reducing spurious high-frequency signals from SFR curves. Reduces sawtooth artifacts in motion blur analysis and improves the reliability of MTF10 measurements, but is not recommended for general use because it lowpass-filters the SFR.

Refer to this documentation, for instructions on using the new options for information capacity calculations, and more information on the new measurements.

Stray Light (Flare)

Main Window

  • Now includes the ability to annotate images with Custom Metadata.
  • Now includes improved General Settings search with highlighting.

Known Issues

This is a Beta version of the software, major issues are listed below:

  • Crash occurs when using Registration Mark Detection on a Star Chart
  • eSFRiso charts ROI not auto detected if “machine vision autodetect” selected on SFRreg settings

Deprecation

Distortion module has been deprecated. Use Checkerboard instead.

Known Issues

  • Linux mp4 file read/write does not work