File:Additive RGB Circles-48bpp.png
Original file (896 × 896 pixels, file size: 950 KB, MIME type: image/png)
Captions
Summary[edit]
DescriptionAdditive RGB Circles-48bpp.png | An image of additive RGB circles, in a colour depth of 16 bits per sample × 3 samples per pixel. |
Date | 27 August 2006 (original upload date) |
Source | No machine-readable source provided. Own work assumed (based on copyright claims). |
Author | No machine-readable author provided. Shlomital~commonswiki assumed (based on copyright claims). |
Purpose[edit]
Intended as a general-purpose image for demonstrating or testing 48-bit truecolour.
Making[edit]
Made with Netpbm 10.27.0 on Win32, with the following script:
pgmramp -ellipse -maxval 65535 512 512 | pnmgamma -srgbramp | pnmpad -width 896 -height 896 -halign 0.25 -valign 0.75 | pgmtoppm rgb:ff/00/00 > step1.ppm
pgmramp -ellipse -maxval 65535 512 512 | pnmgamma -srgbramp | pnmpad -width 896 -height 896 -halign 0.75 -valign 0.75 | pgmtoppm rgb:00/ff/00 > step2.ppm
pgmramp -ellipse -maxval 65535 512 512 | pnmgamma -srgbramp | pnmpad -width 896 -height 896 -halign 0.5 -valign 0.25 | pgmtoppm rgb:00/00/ff > step3.ppm
pamarith -add step1.ppm step2.ppm > int.ppm
pamarith -add int.ppm step3.ppm | pnmtopng -gamma 0.45455 > rgbcircles.png
Image information[edit]
Portable Network Graphics, 896 pixels wide, 896 pixels high, gamma of 0.45455, sRGB with perceptual rendering intent. Created on Thursday the 24th of August 2006.
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 |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
| ||
This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 22:03, 27 August 2006 | 896 × 896 (950 KB) | Shlomital~commonswiki (talk | contribs) | Additive RGB Circles, 48 bits per pixel |
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