Documentation - Previous v5.2

SFR – Basic analysis of slanted-edges (manual ROI selection)

Using SFR Part 1 - Setting up and photographing SFR targets

SFR results: Auto-focus plot

Table of Rescharts slanted-edge MTF modules. (All also available as batch-capable fixed modules.)
All feature automatic region detection, ISO-compliant MTF (sharpness) analysis, and Lateral Chromatic Aberration calculation.

Feature	SFRplus	eSFR ISO	SFRreg	Checkerboard
Sharpness map detail	High	Medium	Depends on arrangement	High
ISO-standard chart design	–	♦	–	–
Color analysis	♦	♦	*	–
Tonal response (OECF)	♦	♦	*	–
Noise analysis	Limited	♦	* Limited	Limited
Distortion	♦	Limited	–	♦
Geometry	♦	♦	*	♦
Features and recommended uses	Imatest's original automatically-detected chart, in use since 2009. robust and versatile. Some white space recommended above and below top and bottom bars. More spatial and distortion detail than eSFR ISO.	ISO-standard chart design. Includes wedge analysis. Supports detailed noise analysis.	Several individual charts are typically placed around the image field. Works with -extreme fisheye lenses (>180º) -target projection systems -Charts at different distances to test focus & depth of field. -extreme high resolution cameras (>36MP) *FoV is omitted from geometry.	Relatively insensitive to framing: can zoom in or out as long as distance is large enough so chart quality is not an issue and there are detectable corners. Well-suited for through-focus measurements. Very accurate distortion measurements.

♦ denotes strong support;  – denotes no support.

SFRplus – Automated analysis of slanted-edges

Using SFRplus Part 1 - The SFRplus chart: features and how to photograph it

Pre-distorted and special charts for Fisheye Lenses - with many applications such as automotive rear view cameras
              Includes SFRplus, eSFR ISO, and SFRreg charts.  Previewing pre-distortion

eSFR ISO – Automated analysis of the ISO 12233:2014 Edge SFR chart

Using eSFR ISO Part 3 - eSFR ISO edge results

Multi-ROI summary – Edge and MTF – Chromatic Aberration – Acutance/SQF – Histograms & noise – Image, Geometry, Distortion, FoV – 3D Plots – Lens style MTF plot – Edge roughness – Point Spread Function – Summary – CSV & JSON output

Rescharts Slanted-edge results Part 4 - eSFR ISO other results (tones, color, wedge, etc.)

Tonal response and gamma - Image, Geometry, Distortion, FoV - Radial distortion - Summary and EXIF data - Color analysis - Detailed noise plot - Wedge aliasing & MTF - Multi-wedge plot - Summary - Links

 

SFRreg – Automated analysis of registration mark patterns

• Test at infinity focus with Long Range projection systems
• Test imaging systems with ultrawide fisheye lenses (>180 degrees)
• Test at very long camera-to-chart distances
• Test at variable distances for Depth of Field.

Checkerboard – Automated analysis of checkerboard patterns

Using Checkerboard Part 1 - Checkerboard patterns and how to photograph them

Rescharts modules – Log F-Contrast, Star, Random, Wedge

Introduction - Getting started - The Rescharts window - Rescharts modules - Slanted-edge SFR - SFRplus - Log frequency (simple) - Log frequency-contrast - Star - Wedge - Random/Dead Leaves - Focus Score

Random/Dead Leaves - Scale-invariant test charts (including Imatest Spilled Coins)
           for measuring texture sharpness

Sharpness utilities & postprocessors

Introduction - Operation - Metrics - Results

Tone, Color, Noise, and Dynamic Range

Using Color/Tone Interactive (Multicharts) - Interactive analysis of color & grayscale test charts

Using Colorcheck

 

Spatial and Uniformity modules

Using Uniformity, Part 1 - Measure lens vignetting and image nonuniformity

Instructions - Results

Using Uniformity, Part 2 - Features in Imatest Master and IS (not in Studio)

Input dialog box - Hot and dead pixels - Color shading - Uniformity profiles - Grid plot - Polynomial fit -  Histograms - Noise detail - Spot detection

Using Uniformity-Interactive - Interactive measurement of vignetting and sensor nonuniformity (can be used with direct image acquisition)

Instructions - Results

Using Blemish Detect - Measure visible sensor defects

The Human Visual System - Algorithm - Instructions - Input dialog - Results

Lightbox Comparison Guide - Comparing lightbox brightness and uniformity

Testing flat screen displays - with Imatest Blemish Detect

Testing method - Defective pixels - Luminance nonuniformity - Color nonuniformity - Summary

Using Distortion  (Checkerboard is recommended for strongly barrel-distorted ("fisheye") lenses.)

Introduction - Instructions - Results - Main figure - Decentering - Corrected image - Intersection figure - Radius correction fig - Comparison with other modules - Links - Algorithm

Dot Pattern - Analysis of a grid of circular dots

Introduction - Setup - Results