Version 3.4.1 of Imatest Master, IT, and IS is now available and includes optimizations to SFR and SFRPlus that drastically reduce processing time for computing MTF (sharpness). Depending on options and settings, results are delivered in half the time or better. Download the latest version today: www.imatest.com/download
- 3D plots with automatic or manual scaling are available in SFRplus and Light Falloff. These plots can be rotated for improved visualization and offer numerous display options. 3D Fig files should be used sparingly: they’re much larger than PNG image files.
- A second secondary readout is available in SFR and SFRplus.
- Color analysis has been added to SFRplus for charts that contain the optional color pattern.
- Several options have been added to SFRplus: edge cropping, additional edge selections, the ability to select the number of rows manually (useful when the square aspect ratio is not 1:1).
- Distortion now works with a single edge near the image boundary. Figures can be saved as Matlab Fig files, which can be opened and manipulated in Imatest.
- The Imatest main window displays the complete EXIF data for an image file (most formats). button in the
To download, go to imatest.com/download
Release 3.2 of Imatsest Master includes SFRplus,a new capability that automatically identifies regions of interest (ROI) and helps you rapidly complete a wide range of image quality tests, including sharpness, lateral chromatic aberration, lens distortion, gamma (contrast), and tonal response. This capability is enabled through use of Imatest’s new test chart, the SFRplus Test Chart, which offers significant advantages over commonly used charts such as the ISO 12233, including: 1) much less wasted area, 2) the ability to produce a map of sharpness over the sensor surface, 3) better measurement accuracy due to the lower contrast. Details can be found at www.imatest.com/sfrplus
Multiple files can be read and averaged (and saved) to facilitate measurements of fixed-pattern noise (in Stepchart, Colorcheck, and Light Falloff) and image stabilization (SFR). Highly distorted regions of interest (ROIs) can be analyzed with Colorcheck and Stepchart. New ΔE measurements and hot/dead pixel options have been added to Light Falloff.
Imatest Master and Studio have been introduced, replacing Pro and Light. Support for Bayer RAW images has been strengthened.
Two new options are available for refining multiple ROI selections in repeated SFR runs (Imatest Master only). (1) Multi-ROI fine adjustment (shift, magnify, reduce), and (2) Automatic ROI refinement. These speed up test sequences of different cameras and lenses, where it may be difficult to maintain exact chart alignment.
RAW files are supported for a large number of digital cameras using Dave Coffin’s dcraw program. Files are converted with minimal signal processing— no sharpening or noise reduction. This allows the true performance of cameras and the behavior of raw converters to be analyzed.
Chromatic Aberration is now measured as percentage of the distance from the image center. This is an improvement over area in pixels because CA tends to be proportional to that distance. The new measurement is relatively independent of camera pixel count and measurement location.
A checkbox on the main window allows you to turn off automatic expansion of the figures for high resolution screens (>1280 pixels wide). The smaller figures are better for posting on the web.