Colour Space for Saving B/W Images - Printable Version +- Opticallimits (https://forum.opticallimits.com) +-- Forum: Forums (https://forum.opticallimits.com/forumdisplay.php?fid=4) +--- Forum: Just Talk (https://forum.opticallimits.com/forumdisplay.php?fid=17) +--- Thread: Colour Space for Saving B/W Images (/showthread.php?tid=2304)

Colour Space for Saving B/W Images - frank - 07-04-2012 I understand that when I make B/W images from color images I need to use a color space of aRGB or ProPhoto RGB just like processing any color images. But when I save a B/W iamage into a jpeg file, does it matter to save it in aRGB or sRGB? In other words, would an aRGB B/W image look different from a sRGB version on web browsers? Thanks in advance, Frank Colour Space for Saving B/W Images - Guest - 07-04-2012 [quote name='Frank' timestamp='1341378643' post='19306'] I understand that when I make B/W images from color images I need to use a color space of aRGB or ProPhoto RGB just like processing any color images. But when I save a B/W iamage into a jpeg file, does it matter to save it in aRGB or sRGB? In other words, would an aRGB B/W image look different from a sRGB version on web browsers? Thanks in advance, Frank [/quote] Any color space with gamma 2.2 or sRGB variant of it should be fine for B/W. I suggest using only sRGB for color, as color managed browsers are still not so common. Colour Space for Saving B/W Images - wim - 07-04-2012 Hi Frank, Yes, it makes a difference, because the different colour spaces also interpret luminosity differently,basically because greys, whites and blacks are essentially specific mixes of all colours. Furthermore, the moment you start using a tint, like sepia, etc., you will also make use of the colour rendition of a colour space, and even more so when using B&W to e.g. emphasise a specific object with a single colour (red strawberry in otherwise B&W surroundings, etc.). IOW, use the colour space you'd normally use, and you should be fine. HTH, kind regards, Wim Colour Space for Saving B/W Images - frank - 07-05-2012 [quote name='wim' timestamp='1341429342' post='19320'] Hi Frank, Yes, it makes a difference, because the different colour spaces also interpret luminosity differently,basically because greys, whites and blacks are essentially specific mixes of all colours. Furthermore, the moment you start using a tint, like sepia, etc., you will also make use of the colour rendition of a colour space, and even more so when using B&W to e.g. emphasise a specific object with a single colour (red strawberry in otherwise B&W surroundings, etc.). IOW, use the colour space you'd normally use, and you should be fine. HTH, kind regards, Wim [/quote] Thank you, Wim. I understand it now. Best regards, Frank