Charts may be purchased from the Imatest Store or created with Test Charts and printed on a high quality inkjet (requires skill). Any chart that contains slanted edge patterns is supported, including the old and new ISO-12233 charts. It calculates and displays the average edge, SFR (Spatial Frequency Response or MTF), Lateral Chromatic Aberration, Subjective Quality Factor (or Acutance), noise (in the Region of Interest), and edge roughness. Slanted-edge SFR largely duplicates SFR. Only a single edge can be analyzed, but it has a highly interactive interface. Slanted-edge SFR supports any chart (such as ISO 12233:2000) that contains slanted-edges. These modules have buttons on the redesigned Imatest main window. For a detailed explanation see MTF Measurement Matrix.Īll Rescharts modules ( Slanted-edge SFR, SFRplus, eSFR ISO, SFRreg, Checkerboard, Log F-Contrast, Star chart, Wedge, Random/Dead Leaves, and Find Sharpest Files/Focus Score) are available as fixed modules that can operate in batch mode. Several chart types are used for analyzing cameras because most cameras for the consumer market have nonlinear (non-uniform) signal processing, i.e., they behave differently near contrasty edges (where sharpening, i.e., high frequency boost, tends to be maximized) than in finely textured regions (where noise reduction, i.e., high frequency cut, tends to be maximized).
All Rescharts modules can read imagesįrom image files ( raw and interchangeable) ♦ via d irect data acquisition from a variety of devices Imatest™ Rescharts is a highly-interactive interface for running several Imatest modules that can analyze images of several different test charts for resolution-related parameters such as sharpness (i.e., Spatial Frequency Response SFR, which is equivalent to Modulation Transfer Function MTF), color moiré, and fine detail lost to software noise reduction. Random/Dead Leaves – Focus Score Introduction Slanted-edge SFR – SFRplus – Log frequency (simple) – Log frequency-contrast – Star – Wedge Getting Started – Rescharts Window – Rescharts modules Introduction – Supported charts – SFR – SFRplus – eSFR ISO – SFRreg – Checkerboard New in Imatest 2020.1 : Shannon information capacity from Siemens Star charts Interactive Analysis of Resolution-Related Charts
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