Imaging Tech

Articles on the state of image quality measurement science

Slanted Edge Noise reduction (Modified Apodization Technique)

For measurement of sharpness, the main driver of variation is noise. A powerful noise reduction technique called modified apodization is available for slanted-edge measurements (SFR, SFRplus, eSFR ISO and SFRreg). This technique makes virtually no difference in low-noise images, but it can significantly improve measurement accuracy for noisy images, especially at high spatial frequencies (f > Nyquist/2). It is applied when the MTF noise reduction (modified apodization) checkbox is checked in the SFR input dialog box or the SFRplus or eSFR ISO More settings window. (more…)

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Advances in Testing Infrared Camera Systems

New infrared test charts and analysis software modernize testing of infrared cameras

Once viewed as exotic devices, infrared camera systems have moved into the mainstream in many industries, particularly in security and defense. From night-vision helmets, scopes, and security cameras to ballistic missile tracking telescopes, IR cameras have become as commonplace as they are mission-critical. As with other advanced technologies, quality control is key to successful development and application of IR camera systems, with the quality of the image itself being paramount to most organizations. (more…)

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Blemish Detection Now Available

Version 3.6 of Imatest’s Master Edition delivers sophisticated blemish detection capabilities based on the human visual system’s ability to detect blemishes. Soon this feature will also be added to the Industrial Testing Edition to enable blemish detection in high-volume camera-system production. Details here

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Image Quality Google Tech Talk

Norman Koren’s Google TechTalk, Image Quality Measurement: Real world challenges, is now available online. For a clearer view of the image quality factors, download the the Presentation (PDF format) (2.8 MB). (more…)

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