May 14, 2018
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Colour Space & Management
WHAT IS A COLOUR SPACE?
Also known as a colour model or system, is a range of colours which is created by primary colours. The definition of a colour space is that it is a mathematical, co-ordinate system model which describes the range of colours.
Canon EOS range uses both sRGB and Adobe RGB. Adobe RBG has wider colour palette as opposed to sRBG, especially for colours which fall within the cyan to green and orange areas. Adobe RGB has better colour quality than sRGB when printed, but not so much on a monitor or beamer. Adobe RGB has a wider colour space than sRGB.
WHAT IS A COLOUR PROFILE?
A colour profile is a set of data which characterises a colour space, i.e. sRGB. It ensures that users can see the same colours on numerous devices. The main aim of colour management is to keep a good colour match across devices.
Adobe RGB vs sRGB Profiles
The Adobe RGB (1998) colour space is an RGB (RED, GREEN BLUE) colour space developed by Adobe Systems, Inc. in 1998. It was designed to encompass most of the colours achievable on CMYK colour printers, but by using RGB primary colours on a device such as a computer display.
sRGB is the standard RGB colour space created cooperatively by HP and Microsoft in 1996 for use on monitors, printers and the Internet, and subsequently standardised by the IEC as IEC 61966-2-1:1999. It is often used as the "default" colour space for images that do not contain any colour space information, especially if the images are stored as 8-bit integers.
To better understand which one to use, you must first understand the difference between the two. AdobeRGB, by all accounts, is better, as it represents a wider range of colours. How much better? They say that AdobeRGB is able to represent about 35% more colour ranges than sRGB is able to. But does that make it the best for photography? Not exactly, as the world works with sRGB far more than it does with AdobeRGB.
How to Accurately Convert Your Photos from AdobeRGB to sRGB
Adobe Lightroom
If you use a tandem of Lightroom and Photoshop, Adobe makes this conversion process painless for you. My workflow and many others consist of loading images into Lightroom, making basic corrections, then importing the image directly into Photoshop. Upon importing to Photoshop, you can have your images converted for the web with just a few simple setting adjustments. Simply go to Edit>>Preferences>>External Editing and adjust your colour space to sRGB when being imported into Photoshop. This technique is the most preferred, as it'll automatically convert all images you export to Photoshop to sRGB, without any colour loss in the web format. This will also allow you to keep both an AdobeRGB copy of the image for print, and an sRGB version to use for the web and everything else.
Adobe Photoshop
If you work without Lightroom and still want the benefits of AdobeRGB colour space, you can also convert your images for the web in Photoshop. Simply navigate through your menus to Edit>>Convert To Profile and change your destination space to sRGB after editing your image. To ensure that you do this every time, I recommend you incorporate it an action used for saving your images. Remember, failure to convert your images prior to saving them for the web will result in dull and unflattering colour tones.
Conclusion
All of this is very confusing and leaves you feeling overwhelmed, you can switch your camera to sRGB colour space. It'll still allow you to photograph and print beautiful images. However, if you're shooting specifically for print, AdobeRGB offers more range and versatility in the images taken. It all really comes down to personal preference, AdobeRGB does offer more colours, but at the cost of complicating things for a subtle difference in your photos. However, if you're a perfectionist, like me, the extra steps taken to shoot in AdobeRGB may be worth the headache to achieve nicer prints, and get the best of both worlds.
References - Fstoppers and Wikipedia
Adobe Creative Suite - Primeros Pasos #1
El Perfil de Color RGB - ¿Con cuál trabajar?
Antes de empezar hablaremos de los más utilizados en pantalla, donde podemos ver que los mayormente conocidos son el Adobe RGB 1998 y el sRGB IEC61966-2.1. Pero, ¿cuál es el más recomendado? Para ello, vamos a explicar básicamente para que fueron diseñados ambos, sin entrar en muchos detalles (pues tiene tela la cosa) y a partir de ahí vosotros seréis quienes mejor lo adaptéis a vuestro trabajo.
sRGB IEC61966-2.1
Este perfil de color está especialmente diseñado para las fotografías que se visualizan por internet, televisión y otros medios audiovisuales ya que asume un promedio del espectro de color que suelen reconocer los monitores de gama media-baja.
Adobe RGB 1998
Por otro lado, este perfil tiene un espectro más amplio de color (aunque para verlo bien necesitaríamos un monitor de gama alta) y es el más recomendado para la edición de fotografías de alta calidad que, posteriormente, se han de convertir a CMYK para su correcta impresión.
Dicho esto, hay que recalcar que ambos espacios de color están lejos de reconocer todo el espectro visible por nuestro ojo. Se suele decir que sRGB abarca el 35% del mismo y el Adobe RGB alcanza un 50%. ¿Qué significa esto? Pues que en fotografía, siempre tenemos que asumir una pérdida de información.
El Prefil de Color CMYK - Coated FOGRA39 (ISO 12647-2:2004)
Este perfil es el más elegido para trabajos a pequeña escala en imprentas pequeñas. Es el estandarizado, el que menos problemas da ya que está preparado para papeles estucados. Pero si lo que queremos es ver el acabado en color en offset, recomiendo el perfil de color ISOcoatedV2, pues es el realizado por El Consorcio Europeo del Color.
Aún así, os dejo un enlace con diferentes tipos de perfiles de color para que podáis ir practicando ya que, al fin y al cabo, nuestro ojo es quien acabará eligiendo (y recuerda, siempre saldrás ganando si puedes llegar a un acuerdo con tu imprenta de confianza).
https://drive.google.com/file/d/0BzECqAHKjoJ0QWVybkQwM0J6YWs/view?usp=sharing
Para guardar los perfiles, simplemente cópialos y pégalos en C:\Archivos de programa (x86) [o sin el x86, cada PC es diferente]\Common Files\Adobe\Color\Profiles\Recommended
Using Soft Proofing in Lightroom to make sure your Images aren't too dark when you export to the web
Using Soft Proofing in Lightroom to make sure your Images aren’t too dark when you export to the web
There’s a common problem that you may have come across if you use Lightroom and share your images on the web a lot, especially if you’re using your own website and it has a primarily white design. That problem is that when you post your images to your site, they suddenly look dark. There are two reasons as to why this can be. One is that it could be a colour profile mismatch. Lightroom works…
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It appears sRGB IEC61966-2.1 wasn't a good match with my latest colour. Came out more yellow and redish than I wanted. Any tips or ideas? What profile do you use for internet publication?
Labrador Sands by Danny Beattie on Flickr.
Developed concepts for Colour Profile's 2011 Calendar photo shoot.