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Topic: Colour Value

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25 BC

	Decorative Painting Resources \| Understanding Colour
		A colour’s value is increased, or lightened, by adding white or another lighter value colour to it.
		Intermediate colours are derived by mixing a primary and its closest secondary colour on the colour wheel.
		Colour schemes are a systematic way of using the colour wheel to put colours together to create colour harmony.
	www.artezan.com /artezan/resources/understanding-colour.htm (794 words)

	Rick McDiarmid - Colour vs Value
		Value' in painting is defined as the relationship between light and dark.
		At this point it is worth revisiting the 3 dimensions of colour that are most important as the basis of colour knowledge for the painter.
		Determining the relative value of a colour or coloured shape means comparison to our value scale from white to fl.
	www.artists.ca /FCA-7cf.html (591 words)

	Albert Henry Munsell
		He intodruces 100 steps for colour "hue", starting with five main colours and five additional colours, and adopts an ordering system with 10 units of colour "value" and an open scale called "chroma" (similar to saturation).
		The variation between the brightness of pure chromatic colours is too great to be arranged in sequence along the equator: yellow, for example, is brighter than red, which is in turn brighter than violet.
		His parameters are hue, value (the index for brightness) and chroma (the gradations of saturation).
	www.colorsystem.com /projekte/engl/31mune.htm (899 words)

	Objectivism and the Evolutionary Value of Colour Vision (Site not responding. Last check: 2007-11-01)
		In section four the value of adaptationist speculation is defended and in the final section, section five, I discuss the basis for a non-objectivist theory of colour perception that is compatible with the adaptationist strategy.
		In attempting to understand human colour vision biologically we begin with a simple objectivism as to chromatic perceptual states and suppose that (a) they represent objective properties of the distal environment, and (b) an adaptive advantage is confered in virtue of such representation.
		Matthen and I agree on {2} and, in a superficial sense, we agree on {1}.
	cogprints.org /366/00/dialogue.html (4224 words)

	HSV colour space (Site not responding. Last check: 2007-11-01)
		This colour system is attributed to "Smith" around 1978 and used to be called the hexcone colour model.
		Value is similar to luninance except it also varies the colour saturation.
		If the colour space is represented by disks of varying lightness then the hue and saturation are the equivalent to polar coordinates (r,theta) of any point in the plane.
	astronomy.swin.edu.au /~pbourke/colour/hsv (153 words)

	Photoshop 8 Colour Management Page 1
		The basic concept underlying colour management is to ensure that colour data is processed in a consistent and predictable way throughout the entire imaging workflow.
		So the main benefit offered by colour management is that the process of colour correction can be undertaken in the knowledge that the image displayed on the monitor is an accurate visual representation of the original subject, and that the final print will accurately reflect the colours of the displayed image.
		Photoshop CS continues to use document/image specific colour settings, which means that the colour space of each document is independent of others that may be open on the Photoshop desktop.
	www.computer-darkroom.com /ps8_colour/ps8_1.htm (1470 words)

	MacPherson Art & Craft Supplies, Tole Painting, Specialty Crafts and More
		To avoid reducing the chroma of the mixture, use the Neutral Gray of the same value as the colour you are trying to mix, or mix a gray from the fl produced with your Green and Red mixture with Zinc or Titanium White.
		It is also a general rule that the lighter the original value of a colour, the less dramatic the value shift when you add Titanium White.
		The shift in value is not noticeable in colours with light values such as Hansa Yellow Medium so, be aware of the possible shifts in value of acrylic colours.
	www.macphersoncrafts.com /HelpfulTips/GoldenColourMixingGuide.htm (2076 words)

	XPCE class colour (Site not responding. Last check: 2007-11-01)
		A `colour' object represents a RGB (red-green-blue) colour value.
		The return value of this method should be valid input for the <-convert method of the class.
		The colours are associated to the original colour such that requesting the same modified colour avoids creating a new colour object and destruction of the main colour causes the derived to loose a reference.
	gollem.swi.psy.uva.nl:8080 /class?name=colour (909 words)

	Colour Ramping for Data Visualisation
		This note introduces the most commonly used colour ramps for mapping colours onto a range of scalar values as is often required in data visualisation.
		The most basic mapping of some scalar value to a colour ramp is to use either an intensity ramp from fl to a single colour or use the greyscale ramp from fl to white.
		On the colour cube this is a diagonal line between the two opposite corners, the red, green, blue components are all the same.
	astronomy.swin.edu.au /~pbourke/colour/colourramp (527 words)

	MFColor (Xj3D Code Library)
		Current field values from the index to the end of the field are shifted down and the field length is increased by one to accomodate the new element.
		Values at indices above the removed element will be shifted down by one and the size of the field will be reduced by one.
		Colour values are required to be in the range [0-1].
	www.xj3d.org /javadoc/org/web3d/x3d/sai/MFColor.html (741 words)

	Colour Contrast Check - snook.ca
		The Colour Contrast Check Tool allows to specify a foreground and a background colour and determine if they provide enough of a contrast "when viewed by someone having color deficits or when viewed on a fl and white screen"[W3C].
		The tool will indicate that the colours pass the test if both the colour difference and the brightness difference exceed their threshold.
		This colour contrast tool was originally based on the HP Colour Contrast Tool.
	www.snook.ca /technical/colour_contrast/colour.html (257 words)

	Colour data structures
		The maximum pixel value of the labeled image is 23, so there are 24 regions: 0 is the background, 1 to 16 are the other connected regions, 17 is the character U and 23 is the character P. The pixel values corresponding to the three small circles of the logos are: 1, 10 and 16.
		A colour table can be built to assign pixel values 0 the colour white, pixel values 1, 10 and 16 the colour red, and the rest to fl.
		If a colour table is used, each pixel can have just one value, an index to a table of width 3 representing the number of possible colours in the image.
	ingenieur.kahosl.be /projecten/AMobe/eindwerken/DigImgPro/Colordat.html (784 words)

	mezzoblue § Colour Bland: Value
		Colour deficiencies are varied and specific to the viewer, so although Pixy and others have come up with mechanical ways to simulate the deficiencies, these can only be used as an approximation and not a final word.
		Value is a hard concept to grasp for non-designers, so first the technical description, followed by an illustration.
		Colour is also the British spelling, but interestingly, I was once told that we brits used the (now) US spelling up until the 17th century.
	www.mezzoblue.com /archives/2003/09/29/colour_bland (1929 words)

	LIGHT TRANSMITTING COLOUR SCALES (Site not responding. Last check: 2007-11-01)
		Colours range from light yellow to red defined by the chromaticities of glass standards numbered from 1 for the lightest to 18 for the darkest.
		Kreis values which indicate the level of rancidity are obtained using a simple equation based on Lovibond Red units, the path length of cell in cm and the concentration of the oil.
		Sample colours are matched by a suitable combination of the three primary colours together with neutral filters, resulting in a set of Lovibond RYBN units that define the colour.
	www.tintometer.com /LTTRANSCLLR_SC.HTM (1731 words)

	Bijuterii - despre diamante (Site not responding. Last check: 2007-11-01)
		Diamonds with a J-Z colour grade usually have yellow shading that can be detected by the naked eye; however, a well cut stone with good proportions will still release the brilliance and fire of a less coloured diamond, dispersing light in such a way as to create a beautiful stone.
		Such diamonds have so much colour that they are not graded on the normal scale D-Z. Believe it or not, these fancy diamonds are particularly rare, and like their colourless counterparts, can also come attached to a high price tag.
		The value of a stone is affected by a combination of qualities including shape, clarity, cut, and carat weight, as well as its colour.
	www.diamante.ro /_en/c_colour.html (224 words)

	Colour Calculator
		The first colour is the true complementary colour, (opposite), to the one displayed in the RGB panel while the second and third are adjacent to it.
		Both the RGB and CMYK values of the colour displayed in the Tint colour pane are shown beneath the Tint scroll bar.
		In the Colour Picker, (lower left), the cursor or mousepointer, may be positioned over any color in the colour pane and the RGB code will be displayed in the RGB value beneath the colour pane.
	www.mick.tilbury.btinternet.co.uk /colcal.htm (846 words)

	Tools - Colour Contrast Analyser 1.1 - WAT-C [Web Accessibility Tools Consortium]
		Once a colour is chosen with the colour sampler (left mouse click or 'enter' key) its hex value will appear in the 'hex value' text box and the results section will be updated to reflect the brightness and colour differences for the currently selected colour combination.
		The 'Full Results' displays the the colour values tested, result values for the test and what the pass/fail criteria are and indicates whether the contrast was found to be sufficient/insufficient.
		Note: The method of determining the colour value transformations for the 3 types of colour deficiency is from an algorithm described by Hans Brettel, Francoise Vienot and John Mollon in a paper which appeared in the Journal of the Optical Society of America V14, #10 pp2647.
	www.wat-c.org /tools/CCA/1.1/index.html (1587 words)

	Windows Graphics
		To truly represent a colour, 24 bits are used : 8 bits each for the amount of red, green and blue in the colour.
		These colours will not necessarily be the same as the colours in the system and hardware palette, so Windows works out how best to match colours in a logical palette with those in the system palette.
		Usually, an image's pixel values are indices to the image's colour table, which is used to get the 24 bit colour associated with the pixel.
	www.geocities.com /SiliconValley/Foothills/4982/wingraph.html (2520 words)

	Colour Contrast Analyser 1.0 - Resources - Web Accessibility - Accessible Information Solutions - Our Services - Vision ...
		Once a colour is chosen with the colour sampler (left mouse click or 'enter' key) its hex value will appear in the 'hex value' text box and the results section will be updated to reflect the brightness and colour differences for the currently selected colour combination.
		Note: The method of determining the colour value transformations for the 3 types of colour deficiency is from an algorithm described by Hans Brettel, Francoise Vienot and John Mollon in a paper which appeared in the Journal of the Optical Society of America V14, #10 pp2647.
		By accessing or using the Colour Contrast Analyser, you acknowledge that you have read, understood and agree to be bound by the Colour Contrast Analyser Terms of Use and the Vision Australia Website Terms of Use.
	www.visionaustralia.org.au /info.aspx?page=628#brightness (1185 words)

	DIGITAL COLOUR ATLAS · OWN COLOUR SYSTEMS
		A colour value table like this: "colour name L-value a-value b-value" could be taken up as a new colour system.
		For this purpose you go to the desired colours with the colour atlas pipette and read the respective lab values out of the colour atlas main window.
		If you have colour or cloth patterns to measure, then it makes sense to buy a good scanner with which the colour value can be extracted via pipette.
	www.colouratlas.com /eigene_farbtoene.htm (277 words)

	Programming Examples: Image Filtering
		When the gif is painted on the web page by your browser, any pixels that use the transparent colour value are totally invisible; to all intents and purposes those pixels were never painted in the first place, so the background colour or image will show through.
		By doing this we are telling the applet to recognize a wider range of pixel values as being close to the single "true" colour value used by the original image before any anti-aliasing techniques were applied.
		This value is adjusted divided by a user-supplied fudge factor that estimates the true colour saturation of the original object.
	web.mit.edu /javalib/www/examples/if/start.html (1481 words)

	wx.lib.colourchooser.pycolourslider.PyColourSlider
		The colour slider displays transitions from value 0 to value 1 in HSV, allowing the user to select a colour within the transition spectrum.
		Returns the colour value for a position on the slider.
		Sets the base, or target colour, to use as the central colour when calculating colour transitions.
	www.wxpython.org /docs/api/wx.lib.colourchooser.pycolourslider.PyColourSlider-class.html (185 words)

	Elements and principles of design
		Value is the lightness or darkness of a colour.
		Gradation of of colour from warm to cool and tone from dark to light produce aerial perspective.
		opposite colours on the colour wheel - red / green, blue / orange etc. Contrast in tone or value - light / dark.
	www.johnlovett.com /test.htm (568 words)

	Computer Laboratory - Resistor Colour Code
		Resistors are normally coded with coloured bands to enable quick identification of their value.
		The colour code specifies the value of the resistor, in ohms, and the maximum deviation from the stated value (the tolerance).
		The four colour code bands are at one end of the component.
	www.cl.cam.ac.uk /Teaching/2003/Hardware/rescol.html (194 words)

	Save colour value from pallette
		The value would have to be stored in the location table.
		I would like to select the colour in the locations form, from a pallette and save that value in the table.
		Then use the click/dblclick event to store that colour on a global variable or pass it into your table.
	www.experts-exchange.com /Databases/MS_Access/Q_21495360.html (1031 words)

	Color negative scanning and transforming into colors of original (US6160643)
		A method for generating digital colour values representing a test target from a colour negative image of the test target, recorded onto an image carrier, said test target including at least one grey swatch, comprising the following steps:
		establishing a relation between the plurality of electrical colour values of each colour component and a luminance of the at least one grey swatch; and,
		a value between the minimum and maximum values that is in a linear relation to the corresponding luminance if said luminance is lying within the global subject brightness range.
	www.delphion.com /details?pn10=US06160643 (548 words)

	Colour Numbers - Hexadecimal Color Value Calculator
		Note that the colours shown are java's interpretation of the colour value.
		This is a color value calculator, which allows you to figure out the hex, or hexadecimal rgb values (red green blue) for any combination of colours.
		This is a color value calculator, which allows you to figure out the hex, or Good for designing web pages or other places where you need an aesthically pleasing combination calculator of foreground and background colours hexadecimal rgb values (red green blue) for any combination of colours.
	www.houseof3d.com /pete/applets/tools/colors (538 words)

	C++ Programming - Assignment #5 (Site not responding. Last check: 2007-11-01)
		Write a C++ class for an abstract data type colour with a public enumeration type colour_type, that has the colour values shown in Figure 11.6.
		Your abstract data type should have an attribute for storing a single value of type colour_type and member functions for reading (read_colour) and writing (write_colour) a colour value, setting a colour value, and accessing a colour value.
		The function read_colour should read a colour as a string and store the corresponding colour value in the value attribute of a type colour object.
	www.ncf.carleton.ca /~ab462/assign5w_plus.html (211 words)

	Ogre Forums :: View topic - Setting alpha colour value of ambient texture?? [solved]
		I had to leave lighting on and use the diffuse color to be able to change alpha values.
		The "sun glare" also needs to have a configurable level between 0 and 1, hence I need to be able to set the "alpha" value of the materials color.
		We also have a "headlight" effect which is done a similar way, and once again the headlight material must have "lighting off" because ambient light will be very low at midnight, but the light must be seen.
	www.ogre3d.org /phpBB2/viewtopic.php?p=173474 (825 words)

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