Sepia tone
From Wikipedia, the free encyclopedia
For toning photographs non-digitally, see Photographic print toning
Sepia tone is a type of digital photo in which the picture appears similar to a traditional black-and-white print toned with sepia. It appears in shades of brown, as opposed to grayscale.
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[edit] Digital sepia tones
Sepia can be produced in many digital cameras and camcorders, or it can be produced in the digital darkroom.
Many photographers prefer to use software, like Photoshop or The GIMP, because these offer more control over how much tint to apply the image, and exactly what hue. There is no single color known as "sepia" - the term covers a range of yellow and brown mixtures.
More sophisticated software tends to implement sepia tones using the duotone feature. Simpler photo-editing software usually has an option to sepia tone an image in one step.
- Adobe recommends setting Hue = 27 and Saturation = 21 and checking the Colorize box in the Hue/Saturation filter in Photoshop[1]
- Microsoft recommends: (a slight modification required)[2]
R' = (R × 0.393 + G × 0.769 + B × 0.189) / 1.351f; G' = (R × 0.349 + G × 0.686 + B × 0.168) / 1.203f; B' = (R × 0.272 + G × 0.534 + B × 0.131) / 2.140f;
The sample photographs below show the process of removing color from a photograph, then applying a conversion to grayscale. The last sample photograph shows the same colored photograph converted to sepia.
 Color image |
 Grayscale image |
 Sepia-toned image |
[edit] See also
[edit] References
- ^ How To: Create sepia toned images. Retrieved on March 17, 2007.
- ^ .NET Matters, Sepia Tone. Retrieved on March 17, 2007.
