File:ExposureTimeSeries.tif
Original file (1,000 × 210 pixels, file size: 225 KB, MIME type: image/tiff)
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Summary[edit]
DescriptionExposureTimeSeries.tif |
English: Series of different exposure times to show the dependence of resolution on contrast. Detail of an USAF 1951 target (group 7) made with a 10x microscope objective with transmitted bright field illumination (köhlered) with very low illumination intensity and recorded with a CCD Camera.
Deutsch: Serie verschiedener Belichtungszeiten, um die Abhängigkeit der Auflösung vom Kontrast zu verdeutlichen.
Dargestellt ist ein Detail aus einem USAF 1951 Target (Gruppe 7), mikroskopisch aufgenommen mit einem 10x Objektiv im Durchlicht-Hellfeld (geköhlert) bei sehr geringer Belichtungsstärke mit einer CCD-Kamera. Die ursprünglichen 4096 Graustufen wurden für diese Darstellung auf 256 Graustufen (8 bit) reduziert, dabei wurde die Helligkeit der einzelnen Aufnahmen angepasst. Bei gleicher Behandlung aller Bilder wären entweder die niedrigen Belichtungszeiten zu dunkel oder die hohen Belichtungszeiten zu hell um etwas zu erkennen. Bei 3 Millisekunden können die größeren Balken gerade eben noch erkannt werden, die kleineren aber nicht mehr. Bei einer Millisekunde sind die Balken nicht mehr erkennbar. Werden aber 100 Bilder mit 1 ms Belichtungszeit zusammenaddiert tauchen die Balken aus dem rauschen wieder auf. Das entstandene Bild ist aber nicht so gut wie eine einzelne Belichtung mit 100 ms, da auch beim Auslesen der Kamera Rauschen entsteht. |
Date | |
Source | Own work |
Author | Dietzel65, Steffen Dietzel |
Licensing[edit]
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:58, 23 October 2013 | 1,000 × 210 (225 KB) | Dietzel65 (talk | contribs) | {{Information |Description ={{en|1=Series of different exposure times to show the dependence of resolution on contrast. Detail of an USAF 1951 target (group 7) made with a 10x microscope objective with transmitted bright field illumination (köhlere... |
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Width | 1,000 px |
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Height | 210 px |
Compression scheme | Uncompressed |
Pixel composition | Black and white (Black is 0) |
Image data location | 20,030 |
Orientation | Normal |
Number of components | 1 |
Number of rows per strip | 210 |
Bytes per compressed strip | 210,000 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS2 Windows |
File change date and time | 17:12, 23 October 2013 |
Color space | Uncalibrated |