How to Test Dynamic Range: A step-by-step use case with the Pixel 2 XL
In this post, we will be using the Contrast Resolution Chart and Imatest Master to measure the dynamic range of […]
Measuring the impact of flare light on dynamic range
Abstract The dynamic range of recent HDR image sensors, defined as the range of exposure between saturation and 0 dB […]
Imatest IS Discontinued with Image Acquisition now Available in Imatest Master
As of Imatest 5.0, Imatest Master now features image acquisition capabilities. Previously, image acquisition capabilities were supported by Imatest IS, […]
Shooting the Great American Total Solar Eclipse
As predicted by astronomers years in advance, a peculiar cosmic event will occur on the morning of August 21st. Passing […]
Challenges in Automotive Image Quality Testing
Imatest’s Norman Koren presents his vision for challenges in automotive image quality testing including resolving low-contrast scenarios.
Closing the Loop: Distortion Correction
Imatest’s charts and software allow you to measure the characteristics and parameters of imaging systems. Quite often these measurements simply […]
The Effects of misregistration on the dead leaves cross-correlation texture blur analysis
This paper was given as part of the Electronic Imaging 2017 Image Quality and System Performance XIV and Digital Photography and […]
Measuring MTF with wedges: pitfalls and best practices
This paper was given as part of the Electronic Imaging 2017 Autonomous Vehicles and Machine session. When: Monday, January 30, […]
Testing a macro lens using Checkerboard and Micro Multi-slide
Imatest’s Checkerboard module is our new flagship module for automated analysis of sharpness, distortion and chromatic aberration from a checkerboard (AKA chessboard) pattern. The big benefit of using the checkerboard is that there are looser framing requirements than with other kinds of test targets. While checkerboard lacks the color and tone analysis provided by SFRplus and eSFR ISO, these features are not available on the high precision chrome on glass substrate, so the checkerboard is the optimal pattern for this test.
Using Sharpness to Measure Your Autofocus Consistency
Autofocus plays a major role in many camera system applications with variable focus, including consumer electronic devices. Camera systems must […]
Imatest Support for CPIQ Metrics
What is CPIQ? IEEE-SA working group P1858 created the CPIQ standard. CPIQ seeks to standardize image quality test metrics and methodologies […]
Color difference ellipses
Starting with Imatest 4.2, Imatest’s two-dimensional color displays— CIELAB a*b*, CIE 1931 xy chromaticity, etc.— in Multicharts, Multitest, Colorcheck, SFRplus, and eSFR ISO can display ellipses that assist in visualizing perceptual color differences. You can select between MacAdam ellipses (of historical interest), or ellipses for ΔCab (familiar but not accurate), ΔC94, and ΔC00 (recommended).
Measuring Multiburst pattern MTF with Stepchart
Measuring MTF is not a typical application for Stepchart— certainly not its primary function— but it can be useful with […]
LSF correction factor for slanted-edge MTF measurements
A correction factor for the slanted-edge MTF (Edge SFR; E-SFR) calculations in SFR, SFRplus, eSFR ISO, SFRreg, and Checkerboard was […]
A Study of Slanted-Edge MTF Stability and Repeatability
by Jackson K.M. Roland Abstract The slanted-edge method of measuring the spatial frequency response (SFR) as an approximation of the modulation […]
Sharpness and Texture Analysis using Log F‑Contrast from Imaging-Resource
Imaging-resource.com publishes images of the Imatest Log F-Contrast* chart in its excellent camera reviews. These images contain valuable information about […]
No Perfect Lens, No Perfect Lens Test
Roger Cicala of LensRentals.com has completed the second part of his two part series investigating lens testing.
Measuring Test Chart Patches with a Spectrophotometer
Using Babelcolor Patch Tool or SpectraShop 4 This post describes how to measure color and grayscale patches on a variety of […]
Measuring the Effects of Tilt
Summary: The physical lens-to-sensor tilt angle is difficult to measure from images, but the effects of tilt on image quality are […]
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 […]
