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"Set colour space to sRGB."

If you are in the habit of printing your own photos, you probably use a colour profile such as Adobe RBG or ProPhoto RGB in your processing. These colour profiles have a larger gamut of colours. As a matter of habit and good practice, many of us carry out all our photo processing using one of these larger colour profiles and we may well even have set our RAW conversion software to open images with one of them.

When it comes to displaying images with a digital projector or on a website, the smaller colour profile, sRGB, is the one to use. If you do not, you risk your image looking a bit lack-lustre or duller than you had intended.

Colour space

Find where your photo manipulation program sets the image's colour profile and change it to sRGB if necessary. In Photoshop CS you will find this in the menu system under Edit > Convert to Profile.

The actual profile name might be like the one in the screen shot above but it will have "sRGB" as all or part of its name.

Some experts in the field have identified problems with the algorithms used in most photo manipulation software, including Photoshop. Based on their findings, It is better to change the colour profile AFTER the resizing step. Resizing an image that has already been converted to sRGB can occasionally give poorer results. However, in the "real world" it usually makes little or no difference whether the resize is done before or after the colour space is set to sRGB. I mention it only for completeness. If it's just as easy to do it either way, we may as well choose the better way.


© David McHutchison (Deemacphotos)
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