Hunt, R.W.G., The Reproduction of Colour in Photography, Printing & Television,. Fourth ed. 1987, Tolworth, England: Fountain Press.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....words, an object of the scene should be represented by the same colour, regardless in which picture it appears. There would be no colour mismatch between individual pictures if the camera applies a colorimetric reproduction model, i.e. a model that attempts to reproduce absolute scene colorimetry [1]. However, current digital cameras normally apply a photographic reproduction model [1, 2] Each image is ana lyzed, exposed and rendered according to its scene content, with the goal of achieving the most pleasing reproduction to a human observer. This accounts for the colour mismatch of ....

....picture it appears. There would be no colour mismatch between individual pictures if the camera applies a colorimetric reproduction model, i.e. a model that attempts to reproduce absolute scene colorimetry [1] However, current digital cameras normally apply a photographic reproduction model [1, 2]. Each image is ana lyzed, exposed and rendered according to its scene content, with the goal of achieving the most pleasing reproduction to a human observer. This accounts for the colour mismatch of individual pictures: the scene content varies between neighbouring pictures, and objects are ....

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R.W.G. Hunt. The Reproduction of Colour in Photography, Printing and Television. Fountain Press, 5 edition, 1995.

....mapping was developed for use in television and photography, but its origins lie in the field of art where artists make use of a limited palette to depict high contrast scenes. It takes advantage of the fact that the HVS has a greater sensitivity to relative rather than absolute luminance levels [14]. Real World Display Scene Tone Reproduction Operator Display with Limited Capabilities Perceptual Match Figure 2: Ideal tone reproduction process Tone reproduction is already used extensively to good effect in photography and television, and some of the methods used ....

....effect in photography and television, and some of the methods used computer graphics have been inspired and influenced by techniques in these media. The use of tone reproduction in photography and television today is explained in Hunt s The Reproduction of Colour in Photography, Print and Film [14] and Poynton s A Technical Introduction to Digital Video [30] which give comprehensive explanations on the subject. This research area is outside the scope of this paper, and it is suggested that readers with an interest in this area refer initially to these works. 2.3 Gamma correction The ....

R. W. G. Hunt. The Reproduction of Colour in Photography, Printing and Television. Fountain Press, Tolworth, 5th edition, 1995.

....sample is given by: 4) where is the fraction of area covered by the cyan ink, is the fraction of area covered by the magenta ink, and is the fraction of area covered by the yellow ink. This relation was established for traditional offset printing using three standard screens rotated at 30 (see [13]) In this particular case, the dot locations for the inks are statistically independent. Note that Neugebauer s model is easily generalized for inks [2] Advanced Neugebauer models take also into account surface reflection, internal reflection and light scattering in the paper. Their prediction ....

Hunt R.W.G., The Reproduction of Colour in Photography, Printing & Television, Fountain Press, Tolworth, England, 1987, page 534.

....which must be attributed to differences in the colour vision of the individual observers. In 1931 the CIE defined a Standard Observer, based on experimental results obtained by W. D. Wright and J. Guild, and by K. S. Gibson and E. P. T. Tyndall. The definition is described in Chapter 8 of [4], as well as in Chapter 3 of [3] These standard observer data consist of the colour matching functions obtained with the monochromatic primaries of wavelengths nm, nm, and nm, and for the reference equienergetic white . Its spectral distribution is constant in the visible spectrum. The colour ....

R. W. G. Hunt, The Reproduction of Colour in Photography, Printing and Television. Fountain Press, 3 ed., 1975.

....Note that the subsets of the LSB ordered palette, Figure 7(a) have a variety of colors while the subsets of the MSB ordered palette, Figure 7(b) have a restricted range of colors. Grayscale and binary images are obtained by using the Y color component of the YIQ color space of the image [27]. Uniform scalar quantizers are used for grayscale and binary error diffusion. The error diffusion mask used is that of [2] although using optimized filters for certain input devices would likely yield better results [28, 6] Results shown are for the 24 bit color Lenna image. The 8 bit color ....

R. W. G. Hunt, The Reproduction of Colour in Photography, Printing & Television, Fountain Press, England, 4 edition, 1987.

....more convenient to work in a color space other than RGB space. The YIQ color space is a linear transformation of the RGB space which consists of a luminance signal, Y, and two chrominance signals, I and Q. This is the standard system used for NTSC color television transmission in the United States [47]. The equations used to transform a set of tristimulus values R, G, and B in RGB space to tristimulus values Y , I , and Q in YIQ space are 2 6 6 6 6 6 6 4 Y I Q 3 7 7 7 7 7 7 5 = 2 6 6 6 6 6 6 4 0:299 0:587 0:114 0:596 Gamma0:274 Gamma0:322 0:211 Gamma0:523 0:312 3 7 7 7 7 7 7 5 2 6 6 ....

R. W. G. Hunt, The Reproduction of Colour in Photography, Printing, & Television. England: Fountain Press, 1987.

....stored on a disk of a given ize is similarly increased. In the present implementation, camera images are stored and subsequently retrieved using C hardware JPEG compression (XVideo card w RTV software, Parallax Graphics, Santa Clara, A) The camera signal is a standard NTSC television signal (see Hunt, 1987), each frame of l which is made up of two interlaced fields. The first field consists of all the odd numbered ines from the image (numbering starts at 1) while the even numbered lines comprise the d second field. These two fields are acquired sequentially and compressed and stored indepen ....

Hunt, R. W. G. (1987). The reproduction of colour in photography, printing and television, K Fountain Press, Tolworth, England.

....ALGORITHM The twenty four bit color images used for our study contain three components: red, green, and blue (RGB) with eight bits being allocated to each color. Before decomposition, the RGB components are linearly transformed to the YIQ components used in NTSC television transmission [12]. The Y component is the luminance image, and the I and Q components are the in phase and quadrature chrominance images. It has been shown that the human visual system is more sensitive to details in the luminance component than to details in the chrominance components [12] hence the luminance ....

....television transmission [12] The Y component is the luminance image, and the I and Q components are the in phase and quadrature chrominance images. It has been shown that the human visual system is more sensitive to details in the luminance component than to details in the chrominance components [12], hence the luminance and chrominance components will be treated differently. The luminance image is transmitted using a three level pyramidal decomposition and quantization and coding algorithm which is described below. The chrominance images are filtered and decimated, then quantized and encoded ....

R. W. G. Hunt, The Reproduction of Colour in Photography, Printing, and Television, Fountain Press, England, 1987. -

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Hunt, R.W.G., The Reproduction of Colour in Photography, Printing & Television,. Fourth ed. 1987, Tolworth, England: Fountain Press.

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R. W. G. Hunt. The Reproduction of Colour in Photography, Printing and Television. Fountain Press, Tolworth, 5th edition, 1995. 2

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R. W. G. Hunt. The Reproduction of Colour in Photography, Printing & Television. Tolworth, Fountain Press, England, 4 edition, 1987.

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R. W. G. Hunt, The Reproduction of Colour in Photography, Printing & Television, 5th Ed. Fountain Press, England, 1995.

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R.W.G. Hunt, The Reproduction of Colour in Photography, Printing, and Television, 4th Ed., Fountain Press, England, 254(1987).

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R. W. G. Hunt. The Reproduction of Colour in Photography, Printing & Television. Tolworth, Fountain Press, England, 4 edition, 1987.

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R.W.G. Hunt, The Reproduction of Colour in Photography, Printing, and Television, Fountain Press, England, p.56 (1987).

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R.W.G. Hunt, The Reproduction of Colour in Photography, Printing, and Television, 4th ed., Fountain Press, England, pp. 373-399, 1987.

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R.W.G. Hunt, The Reproduction of Colour in Photography, Printing, and Television, 4th ed., Fountain Press, England, pp. 56-62, 1987.

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