Using eSFR ISO Part 1

Imatest eSFR ISO performs highly automated measurements of several key image quality factors using versions of the new ISO 12233:2014 E-SFR (Edge SFR) test chart that may be purchased from the Imatest store (recommended) or printed on a high-quality inkjet printer. Region of Interest (ROI) selection is automatic, based on user-entered criteria (similar to SFRplus, which it closely resembles). Image quality factors include: Sharpness, expressed as Spatial Frequency Response (SFR), also known as Modulation Transfer Function (MTF) Lateral Chromatic Aberration Distortion (with less detail than the Distortion module). Details in SFRplus Distortion and Field of View measurements. Noise, measured from the […]

Pre-distorted and special charts for Fisheye Lenses

SFRplus and eSFR ISO can tolerate moderate amounts of optical distortion (pincushion or barrel), but they have definite limits. In this page we describe special versions of SFRplus and eSFR ISO charts that can work with highly barrel-distorted (“fisheye“) lenses, with fields of view up to around 160 degrees— which are used in a number of applications, particularly for automotive rear-view and sports cameras. Cameras with fields of view over 160 degrees— even approaching 360 degrees— can be tested with the SFRreg module, which uses multiple individual “registration mark” charts facing the camera. Pre-distorted charts should only be used with […]

Videos

Categories About Imatest Getting Started Image Quality Factors Software Releases Product Overview In the Lab Measuring & Reading IQ Plots Webinars Industry Events Standards Speeding up videos About Imatest Getting Started Image Quality Factors Software Releases Product Overviews In the Lab Measuring and Reading IQ Plots Webinars Industry Events Speeding up videos A Video Speed Controller is available on the chrome web store. If you prefer to use the console, follow these steps for Google Chrome: Open the video. Hit ctrl+shift+I or right-click then choose Inspect to view the HTML for […]

The Imatest Pass/Fail Monitor

The Pass/Fail monitor (introduced In Imatest 4.0) provides a real-time indication of whether a device has passed or failed a test. It saves the trouble of digging through results— in figures or CSV or JSON files. Key features: It can stay open while modules run, displaying results immediately after calculations are complete. It works best on systems with a high resolution screen or dual screens. It interfaces with most Imatest analysis modules. It can be extremely valuable for developing and testing Pass/Fail criteria for Imatest IT (Industrial Testing). It can call several utilities for helping with this process. It displays […]

December 17, 2013August 15, 2021 Henry Koren

Speeding Up Imatest IT with INI File Settings

This article focuses on how to improve the performance of Imatest IT testing using configuration (ini file) settings. Limiting the number of regions used to test, limiting the size of the regions API Section Settings Disable messages and figures [api] nomsg = 1 disable_figs = 1 Settings for Slanted-Edge modules: SFR, SFRplus, eSFR ISO, Checkerboard, SFRreg Many of the settings described here are also listed in Using Rescharts slanted-edge modules Part 2: Speeding up runs. (Although Imatest IT does not run Rescharts directly, Rescharts is used in Imatest Master to make and save settings that can be used in several […]

November 26, 2013October 10, 2022 norman

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 camera quality— how sharpness and texture response are affected by image processing— but they need to be processed by Imatest to reveal the important information they contain. *F is an abbreviation for Frequency in Log F-Contrast.

November 13, 2013April 10, 2019 Henry Koren

Reflective Chart Quality Comparison: Inkjet vs. Photographic

In our last chart quality investigation we looked at the fine detail of transmissive (backlit) test charts. Now we will look in to the properties of reflective charts. Imatest currently offers three types of reflectively-illuminated test chart. Most of the charts we produce are printed on a high quality inkjet printer on matte or semi-gloss (luster) papers. We also have a chart that is produced with a photographic process. We will determine which of these substrates has the sharpest edge and quantify the difference.

October 11, 2013October 3, 2022 Henry Koren

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.

Imatest Image Acquisition with Omnivision OVTAPantherM

Introduction This page briefly illustrates how to use the Imatest with Omnivision OVTAPantherM. Please note that Omnivision cameras are not supported in the OSX and Linux version of Imatest. However, Imatest supports other development systems to varying degrees. Contact us for details. Load images directly from Omnivision sensors. This eliminates the need to capture images separately, store them, then load them individually into Imatest, dramatically improving productivity. Download and Install Software To download Imatest software, go to store.imatest.com/software.html Download and open the self-extracting executable (Imatest-IS-3.n.exe). This will install the Imatest Master edition and the Matlab Compiler Runtime (MCR), which is required […]

October 1, 2013April 6, 2020 Henry Koren

Imatest 3.10 Released

The release of version 3.10 of Imatest brings a host of improvements to make image quality testing faster and more relevant to advances in cameras. Look for performance, stability, interface and measurement improvements across the board as well as some excellent new modules and features.

September 26, 2013February 15, 2022 Henry Koren

Transmissive Chart Quality Comparison

Imatest currently sells several transmissive (backlit) test charts, which have a range of substrates, each with specific properties and qualities that are in process of being quantified. The following comparison of the most important of our transmissive substrates was prepared in response to several customer inquiries.

July 1, 2013April 8, 2020 norman

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 test charts, including Imatest SFRplus and eSFR ISO charts, the X-Rite Colorchecker, ISO-15729, ISO-14524, ChromaDuMonde CDM-28R, and many more, using a spectrophotometer and one of two software packages. Babelcolor PatchTool which works with reflective test charts Robin Myers SpectraShop 4 which works with both reflective and transmissive (backlit) test charts

Chart Quality Index (CQI) (deprecated)

Imatest 5.1 has important new capabilities for measuring and correcting MTF degradation caused by test charts. These new capabilities are far easier to understand and apply than CQI. Chart quality calculator Compensating camera MTF measurements for chart and sensor MTF As a result of the improved measurements, the Chart Quality Index measurement has been deprecated. The Chart Finder is an interactive web page that can help you select the appropriate chart size and media. It contains results from this page, but without the math. Summary In order to determine the suitability of a test chart is for measuring the performance of a […]

Imatest with ON Semiconductor DevWare

Introduction This page illustrates how to use image acquisition with ON Semiconductor DevWare, which is a part of ON Semiconductor’s DevSuite. Imatest also supports other development systems. Load images directly from DevWare. This eliminates the need to capture images separately, store them, then load them individually into Imatest, dramatically improving productivity. Note: As of Imatest 5.0 image acquisition capabilities were added to Imatest Master and Imatest IS was discontinued. Learn more. Download and Install Software To download Imatest Master software, go to www.imatest.com/products/imatest-master/ Download and open the self-extracting executable (Imatest-IS-3.n.exe). This will install Imatest and the Matlab Compiler Runtime (MCR), which is required for […]

SFRplus Charts for GTI Light Boxes

The SFRplus test chart can be used with the Imatest SFRplus module to measure MTF, lateral chromatic aberration, distortion, and tonal response. The SFRplus module features fully automated region-of-interest detection. The SFRplus chart offers significant advantages over commonly used charts such as the ISO 12233 chart, 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, and 4) full support for automated testing.

These transmissive charts are designed to mount directly into the light boxes produced by GTI. The bar-to-bar height and width of the total chart are designed and cut to fit into the GTI light boxes with as little light bleed as possible.

SFRplus Large LVT Film Chart

This transmissive (backlit) SFRplus test chart can be used with the Imatest SFRplus module to measure MTF, lateral chromatic aberration, distortion, and tonal response. The SFRplus module features fully automated region-of-interest detection. The SFRplus chart offers significant advantages over commonly used charts such as the ISO 12233 chart, including 1) use of space, 2) the ability to produce a map of sharpness over the sensor surface, 3) better measurement accuracy due to the lower contrast (4:1), and 4) full support for automated testing.

Size

This chart has an active chart area of 48.3 cm x 26.81 cm (19 in x 10.56 in) in a total film size of 30.48 cm x 50.8 cm (12 in x 20 in). Bar-to-bar height is 252 mm (9.92 in).

Email charts@imatest.com for current availability and lead time.

Lync RevF Implementation

This is a review of Microsoft Doc#: H100693 to see what testing criteria Imatest Master and Imatest IT can satisfy. Please contact support@imatest.com with any questions. Certification Metric Pg# Status Notes Support USB Video Class (UVC) Driver 11 Not Supported no plan to support, instructions for checking driver included Support USB Audio Class (UAC) Driver 12 Not Supported no plan to support, instructions for checking driver included Product driver signed by Microsoft (WHQL) 13 Not Supported no plan to support, instructions for checking driver included Method to control video processing in driver/camera 13 Not Supported Executables for testing face detection […]

Image Stabilization/Sharpness Compare

Introduction The Imatest Image Stabilization/Sharpness Compare module is a postprocessor for SFRplus that Measures the effectiveness of Optical Image Stabilization (abbreviated as IS or OIS) by comparing the sharpness (MTF or related lengths) of selected near-horizontal and near-vertical edges from three similar SFRplus images: Unshaken. Shaken without Image Stabilization. (Some recent cameras lack the ability to turn IS off. There are several approaches to measuring IS effectiveness in this case. One is to have a very precise vibratory apparatus with known vibration angles. Expen$ive. Another is to substitute a camera with similar pixel configuration and lens focal length, but no […]

Dead Leaves measurement issue

In January 2013 Imatest released the Spilled Coins test chart, which is an improved version of the Dead Leaves chart for measuring a camera’s fine texture response. (It’s available in the Imatest Store in both monochrome and color versions.) Shortly afterwards, Jason Cope of our partner company Image Quality Labs found an anomalous result and called me to find out what was wrong. When I looked at the image I realized that he’d done the test correctly. He had found an image whose processing defeated the intent of the dead leaves chart, which is to accurately measure a camera’s texture […]

Long Wave Infrared Test Charts

Contact sales@imatest.com for lead time.

Imatest’s Infrared Long Wave Infrared Test Charts act as black body emitters, designed for testing the resolution of thermal imaging systems. The back plate is uniformly heated with a silicone heating blanket, and the thermally isolated front plate stays near the ambient temperature of your testing environment. In combination with the Imatest Master software package, LWIR targets allow you to test the MTF (sharpness) of your thermal imaging system, using an adjustable heating differential between the two aluminum plates. They are available in a variety of test chart patterns, including single slanted edge, SFRplus, and custom.

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