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Original file ‎(908 × 1,366 pixels, file size: 661 KB, MIME type: image/jpeg)

Summary

Description
English: File:Clock_Tower_from_Su_Song's_Book.JPG with smear removed by mixing channels:
  • Red: 0.2 green + blue
  • Green: 0.4 green + 0.65 blue
  • Blue: blue
as red is badly smeared, green is slightly smeared but has least noise, and blue is not smeared but has most noise.
Date
Source File:Clock_Tower_from_Su_Song's_Book.JPG
Author Su Song

Licensing

Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.

This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

Captions

The water-powered mechanism of Su Song's astronomical clock tower

Items portrayed in this file

depicts

inception

15 August 2007

captured with

Sony Cyber-shot DSC-T1

exposure time

0.125 second

f-number

3.5

focal length

6.7 millimetre

ISO speed

100

MIME type

image/jpeg

instance of

photograph

checksum

c76d00f3d19e2c9b8b454aaca8baf9247af1b1ad

determination method: SHA-1

data size

676,373 byte

height

1,366 pixel

width

908 pixel

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current12:50, 14 July 2015Thumbnail for version as of 12:50, 14 July 2015908 × 1,366 (661 KB)CmgleeUser created page with UploadWizard

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Metadata

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source: https://en.wikipedia.org/wiki/File:Clock_Tower_from_Su_Song%27s_Book_desmear.JPG

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