File:Fire-breather 601 Luma Y'.jpg

Original file ‎(3,288 × 2,416 pixels, file size: 1.33 MB, MIME type: image/jpeg)

Summary

Description	English: This is the Luma (Y′) of the original image Fire_breathing_2_Luc_Viatour.jpg, which shows the Fire breathing "Jaipur Maharaja Brass Band", Chassepierre, Belgium. Y′ has been calculated using the weightings from Rec. 601. Since sRGB does not use NTSC primaries, this is actually an incorrect calculation of Luma, which should use Rec. 709 weightings instead, but it is the calculation Adobe Photoshop uses for its “Luminosity”, “Color”, “Hue”, and “Saturation” blend modes, regardless of an RGB image’s color space.
Source	Fire_breathing_2_Luc_Viatour.jpg
Date	2010-02-04
Author	Fire_breathing_2_Luc_Viatour.jpg: Luc Viatour; various "lightness" components extracted by jacobolus
Permission (Reusing this file)	See below.
Other versions	200px 200px 200px

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	02:20, 21 January 2018		3,288 × 2,416 (1.33 MB)	Gilgamesh (talk \| contribs)
	15:45, 9 January 2017	No thumbnail	(0 bytes)	127.0.0.1 (talk)	This is the Luma (<i>Y</i>′) of the original image <a href="//commons.wikimedia.org/wiki/File:Fire_breathing_2_Luc_Viatour.jpg" title="File:Fire breathing 2 Luc Viatour.jpg">Fire_breathing_2_Luc_Viatour.jpg</a>, which shows the <a href="https://en.wikipedia.org/wiki/Fire_breathing" class="extiw" title="en:Fire breathing">Fire breathing</a> "Jaipur Maharaja Brass Band", Chassepierre, Belgium. Y′ has been calculated using the weightings from Rec. 601. Since sRGB does not use NTSC primaries, this is actually an incorrect calculation of Luma, which should use Rec. 709 weightings instead, but it is the calculation Adobe Photoshop uses for its “Luminosity”, “Color”, “Hue”, and “Saturation” blend modes, regardless of an RGB image’s color space.

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