Industry Events – Imatest

Virtual Visit to Imatest’s Booth at AutoSens Europe 2024

Henry Koren — Fri, 25 Oct 2024 15:47:47 +0000

A walk around Imatest’s booth at AutoSens Europe 2024, with a look at the automotive camera test setups, charts and software we demonstrated there.

Read more about the event in Imatest Presented at AutoSens Europe 2024.

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Electronic Imaging 2024 Recap

Henry Koren — Sat, 24 Feb 2024 22:08:42 +0000

A recap of Imatest at Electronic Imaging 2024 (January 21–25, 2024, Burlingame, California): our booth and test equipment demonstrations, and the talks Imatest presented, including Norman Koren’s keynote on image information metrics.

Read about the papers and presentations in Electronic Imaging 2024 Recap, and Norman Koren’s talk in Image information metrics from slanted edges.

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AutoSens Insights Interview with Henry Koren

Henry Koren — Tue, 21 Nov 2023 18:13:06 +0000

Henry Koren, Imatest’s Chief Product Officer, interviewed for AutoSens Insights in 2023. Also on YouTube.

See our coverage of the event in Virtual Visit to Imatest’s Booth at AutoSens Brussels 2023.

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AutoSens Brussels 2023

Wed, 11 Oct 2023 00:00:00 +0000

Imatest attended Autosens Brussels where we demonstrated the BTS Stray light & Target Projector, and Norman Koren presented Information Capacity and related measurements (NEQ, SNRi and more), which are camera image quality metrics that hold strong promise of accurately predicting machine vision performance.

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Validation Methods for Geometric Camera Calibration

Henry Koren — Mon, 23 Mar 2020 06:00:00 +0000

Paul Romanczyk, Senior Imaging Scientist at Imatest, presents his Electronic Imaging 2020 paper. Camera-based advanced driver-assistance systems (ADAS) need the mapping from image coordinates to world coordinates, which geometric calibration provides. The talk describes tests for judging how good a calibration is and for comparing calibration models for an as-built camera, driven by automotive use cases:

Image coordinate system test: are different teams using the same image coordinates?
Reprojection test: forward-project targets through the model onto the image plane
Projection test: inverse-project points through the model out into the world
Triangulation test: how well a multi-camera system locates a point in 3D

Download the paper and slides in Validation Methods for Geometric Camera Calibration. Also on YouTube.

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Verification of Long-Range MTF Testing Through Intermediary Optics

Henry Koren — Mon, 23 Mar 2020 06:00:00 +0000

Alex Schwartz, Sarthak Tandon and Jackson Knappen of Imatest present their Electronic Imaging 2020 paper. Testing a camera at its real working distance, several meters to infinity, is rarely practical in production, so intermediary optics (relay lenses) are used to simulate long test distances. The Imatest Collimator Fixture does this with a relay lens and a test chart. The talk shows how to verify that the simulated distances are right: by comparing where peak MTF occurs at real distances with where it occurs at the matching simulated distances on the fixture.

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Reducing the Cross-Lab Variation of Image Quality Metrics

Henry Koren — Tue, 15 Jan 2019 07:00:00 +0000

Henry Koren of Imatest presents this IEEE Camera Phone Image Quality (CPIQ) paper at Electronic Imaging 2019, on behalf of the IEEE CPIQ Conformity Assessment Steering Committee (CASC). Round-robin studies tested the same mobile devices in different labs and found many things that skew results: near-infrared energy in light sources meant to simulate CIE illuminants, the opal diffusers used for uniformity testing, how scene framing changes white balance and exposure, and how chart quality and texture frequency content affect texture blur scores. The talk introduces a test procedure to reduce lab-to-lab variation and a way to assess whether an independent lab conforms to the IEEE CPIQ standard.

See Reducing the cross-lab variation of image quality metrics for the abstract, the IEEE 1858 standard and test plan, and the presentation slides. Also on YouTube.

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Challenges in Automotive Image Quality Testing

Mon, 19 Jun 2017 00:00:00 +0000

Imatest’s Norman Koren presents his vision for challenges in automotive image quality testing.
This video was previously recorded at Autosens Detroit 2017, the world’s leading vehicle perception conference. See more more at www.auto-sens.com.

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A Study of Slanted-Edge MTF Stability and Repeatability

Tue, 17 Feb 2015 00:00:00 +0000

The slanted-edge method of measuring the spatial frequency response (SFR) as an approximation of the modulation transfer function (MTF) has become a well known and widely used image quality testing method over the last 10 years. This method has been adopted by multiple international standards including ISO and IEEE. Nearly every commercially available image quality testing software includes the slanted-edge method.

Presented by Jackson K.M. Roland at Electronic Imaging 2015 (Proc. SPIE 9396, Image Quality and System Performance XII). Read the paper, the 2021 correction to its angle equation, and get the MATLAB code and test images in A Study of Slanted-Edge MTF Stability and Repeatability.

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Image Quality Measurement: Real World Challenges (Google Tech Talk)

Henry Koren — Wed, 15 Aug 2007 06:00:00 +0000

Norman Koren, founder of Imatest, gives a Google Tech Talk on August 15, 2007, as part of Google’s Photographic Tech EDU series. He covers how image quality is predicted and measured, tours the main image quality factors (sharpness and MTF, noise, dynamic range, color and exposure accuracy, chromatic aberration and more) with examples of Imatest analysis, and reviews the Imatest modules used to measure them.

For a clearer view of the slides, download the presentation (PDF). See also Image Quality Google Tech Talk. Recorded by Google TechTalks and shown here with permission; the original is on YouTube.

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