摄像头测试图卡及IMATEST测试项

一、测试图卡

(24-patch)

Color accuracy, Tonal response

Multicharts (Special charts)

Custom "pie" charts

Color accuracy, Tonal response

Multicharts

GretagMacbeth ColorChecker SG

Sharpness, Lateral chromatic aberration, Subjective Quality Factor (SQF) ISO 12233, Applied Image QA-77

SFR

Printed on high resolution photographic media. Slanted-edge charts printed on a high quality inkjets can perform the same function, but aren’t as fine.

Color accuracy, Tonal response

Multicharts

Requires reference file

IT8.7

Dynamic range, Tonal response, Contrast Monochrome charts: ISO-16067-1, QA-62, EIA Grayscale, ISO-14524 OECF, ISO-15739 Noise, 20-patch OECF charts

Stepchart, Multicharts (Special charts)

Color accuracy, Tonal response QPcard 201

Multicharts

Inexpensive chart

Step charts (reflective): Kodak Q-13, Q-14, etc.

Tonal response, Contrast, Noise, Exposure accuracy, Veiling glare

Stepchart, Multicharts. Dynamic Range

Veiling glare is measured with "black hole" next to the Q-13. May be purchased from professional camera stores or Danes-Picta.

Sharpness, Color moiré, Detail lost to software noise reduction

Rescharts Log Frequency, Log F-Contrast

MTF is a check on the slanted-edge method; more direct but less accurate.

Log Frequency, Log F-Contrast (sine or bar)

Sharpness

Star chart

Imatest Master only. May be created for printing by Test Charts or purchased from Image Engineering.

Siemens star chart

二、imatest测试内容

Stepchart

Tonal response, Contrast, Noise, Dynamic range, Exposure accuracy, Veiling glare (lens flare) (Postprocessor for Stepchart) Tonal response, Dynamic range

Step charts, Special charts: ISO-16067-1, QA-62, EIA Grayscale, ISO-14524 OECF, ISO-15739 Noise, 20-patch OECF charts Reflective step charts such as the Kodak Q-14/Q-14.

Special charts in Imatest Master only. Transmissive charts such as the Stouffer T4110 recommended for DR. Usually more convenient than Stepchart for measuring DR because it doesn’t require a transmission chart, special light source, and darkened room. Gamutvision extracts these properties from ICC profiles.

Dynamic Range

Print Test

Dmax (deepest black tone), Color gamut Sharpness (MTF), Color moiré

Custom test chart printed from file, scanned on profiled flatbed scanner Log Frequency (can also use Log Frequency-Contrast chart) Log Frequency-Contrast

Log Frequency

Log F-Contrast

Sharpness (MTF), Software artifacts

Star Chart

Sharpness (MTF)

Star chart