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colour [2015/06/11 07:58] slackermedia |
colour [2021/06/03 19:48] (current) |
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| - | [[{arrowp.png|border:0;background:none;width:0;display:inline-block;position:absolute;top:0;left:0;}deps|]] | ||
| - | [[{arrown.png|border:0;background:none;width:0;display:inline-block;position:absolute;top:0;margin-left:2.5em;}jack|]] | ||
| ======Colourspace====== | ======Colourspace====== | ||
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| The layout of a colourspace is called a ''gamut''. A gamut is the set of possible values with a colourspace, with a reference point for defining //white//. | The layout of a colourspace is called a ''gamut''. A gamut is the set of possible values with a colourspace, with a reference point for defining //white//. | ||
| - | {{ gamutd.jpg }} | + | {{ gamut.jpg?345 }} |
| ===== Converting Colourspaces ===== | ===== Converting Colourspaces ===== | ||
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| So the goal in converting colourspace is to have no visual difference, but since gamuts are different across devices, conforming two of them does risk losing information. | So the goal in converting colourspace is to have no visual difference, but since gamuts are different across devices, conforming two of them does risk losing information. | ||
| - | {{ gamutoffsetd.jpg }} | + | {{ gamutoffset.jpg?345 }} |
| For instance, pixels that were painted blue in one colour space might be forced closer to white to stay within the gamut, giving the blues a less saturated appearance. Pixels that were red might be forced away from the white point, making them appear "more red" after conversion. | For instance, pixels that were painted blue in one colour space might be forced closer to white to stay within the gamut, giving the blues a less saturated appearance. Pixels that were red might be forced away from the white point, making them appear "more red" after conversion. | ||
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| It is akin to saving a RAW image to TARGA for later compression to PNG, or a movie file to HuffYUV as a source for WEBM and MP4 files, or audio to WAV or ALAC for compression to OGG or FLAC. | It is akin to saving a RAW image to TARGA for later compression to PNG, or a movie file to HuffYUV as a source for WEBM and MP4 files, or audio to WAV or ALAC for compression to OGG or FLAC. | ||
| - | If you are dealing with several coloursapaces that require conforming, experiment with ACES to see if it is a suitable intermediary between colourspaces. If your spaces are similar, you may not need an intermediate step. | + | If you are dealing with several colourspaces that require conforming, experiment with ACES to see if it is a suitable intermediary between colourspaces. If your spaces are similar, you may not need an intermediate step. |
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| *Your computer monitor has its own gamut of all possible colours it can produce, which is defined as its own colourspace. | *Your computer monitor has its own gamut of all possible colours it can produce, which is defined as its own colourspace. | ||
| - | {{ devices.jpg }} | ||
| An ideal setup would be one in which each device and each application used the same colourspace. This rarely happens, but it's a good reminder not to over-think colourspace; if your camera produces, for instance, an ''sRGB'' image, and your computer is happy to use ''sRGB'', then standardise on that. If your camera embeds ''Adobe_RGB'' and your computer can happily use that, then standardise on that. | An ideal setup would be one in which each device and each application used the same colourspace. This rarely happens, but it's a good reminder not to over-think colourspace; if your camera produces, for instance, an ''sRGB'' image, and your computer is happy to use ''sRGB'', then standardise on that. If your camera embeds ''Adobe_RGB'' and your computer can happily use that, then standardise on that. | ||
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| - | [[{arrown.png|border:0;background:none;width:0;display:inline-block;float:right;}jack|]][[{arrowp.png|border:0;background:none;width:0;float:right;}deps|]] | + | <WRAP centeralign> |
| + | <wrap fa>[[dep|R]]</wrap> <wrap fa>[[start|S]]</wrap> <wrap fa>[[jack|Q]]</wrap> | ||
| + | </WRAP> | ||