The document discusses color models including HLS and YIQ. It provides background on visible light wavelengths and introduces the YIQ and HLS color models. The YIQ model with Y for luminance, I for in-phase, and Q for quadrature was used in analog television to transmit color information using one signal. The HLS and HSV models represent color as Hue, Lightness/Value, and Saturation in a double hexagonal cone with white at the top and black at the bottom to better match human color perception compared to the RGB model. The models have applications in color selection, comparison, editing and image analysis.
full color,pseudo color,color fundamentals,Hue saturation Brightness,color model,RGB color model,CMY and CMYK color model,HSI color model,Coverting RGB to HSI, HSI examples
full color,pseudo color,color fundamentals,Hue saturation Brightness,color model,RGB color model,CMY and CMYK color model,HSI color model,Coverting RGB to HSI, HSI examples
Any colour that can be specified using a model will correspond to a single point within the subspace it defines. Each colour model is oriented towards either specific hardware (RGB,CMY,YIQ), or image processing applications (HSI).
Color fundamentals and color models - Digital Image ProcessingAmna
This presentation is based on Color fundamentals and Color models.
~ Introduction to Colors
~ Color in Image Processing
~ Color Fundamentals
~ Color Models
~ RGB Model
~ CMY Model
~ CMYK Model
~ HSI Model
~ HSI and RGB
~ RGB To HSI
~ HSI To RGB
color image processing is divided into two major areas:
1. Full Color image Processing
2. Pseudo Color image Processing
It Includes Color Fundamentals,Color Models,Pseudo color image Processing,Full Color image Processing,Color Transformation.
Presentation By daroko blog-where IT learners apply Skills in real business environment.
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This presentation will introduce you to color representation in computer graphics.
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APPLY them in real business,
Visit Daroko blog for real IT skills applications,androind, Computer graphics,Networking,Programming,IT jobs Types, IT news and applications,blogging,Builing a website, IT companies and how you can form yours, Technology news and very many More IT related subject.
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• Daroko blog (www.professionalbloggertricks.com)
• Presentation by Daroko blog, to see More tutorials more than this one here, Daroko blog has all tutorials related with IT course, simply visit the site by simply Entering the phrase Daroko blog (www.professionalbloggertricks.com) to search engines such as Google or yahoo!, learn some Blogging, affiliate marketing ,and ways of making Money with the computer graphic Applications(it is useless to learn all these tutorials when you can apply them as a student you know),also learn where you can apply all IT skills in a real Business Environment after learning Graphics another computer realate courses.ly
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Any colour that can be specified using a model will correspond to a single point within the subspace it defines. Each colour model is oriented towards either specific hardware (RGB,CMY,YIQ), or image processing applications (HSI).
Color fundamentals and color models - Digital Image ProcessingAmna
This presentation is based on Color fundamentals and Color models.
~ Introduction to Colors
~ Color in Image Processing
~ Color Fundamentals
~ Color Models
~ RGB Model
~ CMY Model
~ CMYK Model
~ HSI Model
~ HSI and RGB
~ RGB To HSI
~ HSI To RGB
color image processing is divided into two major areas:
1. Full Color image Processing
2. Pseudo Color image Processing
It Includes Color Fundamentals,Color Models,Pseudo color image Processing,Full Color image Processing,Color Transformation.
Presentation By daroko blog-where IT learners apply Skills in real business environment.
-------------------------------------------------------------------------------------
This presentation will introduce you to color representation in computer graphics.
-----------------------------------------------------------------
Do Not just learn computer graphics an close your computer tab and go away..
APPLY them in real business,
Visit Daroko blog for real IT skills applications,androind, Computer graphics,Networking,Programming,IT jobs Types, IT news and applications,blogging,Builing a website, IT companies and how you can form yours, Technology news and very many More IT related subject.
-simply google:Daroko blog(professionalbloggertricks.com)
-------------------------------------------------------------------
• Daroko blog (www.professionalbloggertricks.com)
• Presentation by Daroko blog, to see More tutorials more than this one here, Daroko blog has all tutorials related with IT course, simply visit the site by simply Entering the phrase Daroko blog (www.professionalbloggertricks.com) to search engines such as Google or yahoo!, learn some Blogging, affiliate marketing ,and ways of making Money with the computer graphic Applications(it is useless to learn all these tutorials when you can apply them as a student you know),also learn where you can apply all IT skills in a real Business Environment after learning Graphics another computer realate courses.ly
• Be practically real, not just academic reader
The Importance of Terminology and sRGB Uncertainty - Notes - 0.5Thomas Mansencal
The organised and formatted embodiment of the Colour Science notes I have taken along the years.
It is aimed at the VFX industry, and is the work-in-progress subset of a broader and generic Colour Science presentation.
An investigation for steganography using different color systemDr Amira Bibo
ABSTRACT
Steganographic techniques are generally used to maintain the confidentiality of
valuable information and to protect it from any possible theft or unauthorized use
especially over the internet. In this paper, Least Significant Bit LSB-based
Steganographic techniques is used to embed large of data in different color space
models, such as (RGB, HSV, YCbCr, YIQ, YUV). The idea can be summarized by
transforming the RGB value of the secret image pixels into three separate components
into the pixels of the cover image.
The measures (MSE, SNR, PSNR) were used to compare between the color
space models, the comparisons proved that steganography with color systems (RGB
and HIS) shown a best results.
The Importance of Terminology and sRGB Uncertainty - Notes - 0.4Thomas Mansencal
The latest version of this presentation is available at this URL: https://www.slideshare.net/thomasmansencal/the-importance-of-terminology-and-srgb-uncertainty-notes-05
The organised and formatted embodiment of the Colour Science notes I have taken along the years.
It is aimed at the VFX industry, and is the work-in-progress subset of a broader and generic Colour Science presentation.
4. Violet: 7.5 x 1014 hertzR-O-Y-G-B-I-V Wavelength (700 nm) Wavelength (400 nm) Lowest Frequency Highest Frequency Requisites: 3
5. 4 HUE BRIGHTNESS SATURATION COLOUR, DOMINENT FREQUENCY PERCIEVED INTENSITY OF LIGHT THE WASHING OUT EFFECT ED = DOMINENT LIGHT. ENERGY DENSITY EW = ENERGY DENSITY OF WHITE LIGHT AREA UNDER THE CURVE -> BRIGHTNESS MORE THE VALUE OF (ED-EW) PURER IS THE COLOUR
6. 5 Some more terms: The dimensions of the HSV and HSL geometries, simple transformations of the not-perceptually-based RGB model, are not directly related to the photometric color-making attributes of the same names, as defined by scientists, for instance by the CIE or ASTM. Nonetheless, it is worth reviewing those definitions before leaping into the derivation of our models. Hue is the “attribute of a visual sensation according to which an area appears to be similar to one of The perceived colors: red, yellow, green, and blue, or to a combination of two of them”. Intensity or radiance is the total amount of light passing through a particular area. Luminance, denoted Y and measured in cd/m2, is the radiance weighted by the effect of each wavelength on a typical human observer. Often the term luminance is used for the relative luminance, Y/Yn, where Yn is the luminance of the reference white point. Luma is the weighted sum of gamma-corrected R′, G′, and B′ values, denoted Y′, and used in Y′CbCr, for JPEG compression and video transmission. Brightness is the “attribute of a visual sensation according to which an area appears to emit more or less light”. Lightness or value is the “brightness relative to the brightness of a similarly illuminated white”. Colorfulness is the “attribute of a visual sensation according to which the perceived color of an area appears to be more or less chromatic”. Chroma is the “colorfulness relative to the brightness of a similarly illuminated white”. Saturation is the “colorfulness of a stimulus relative to its own brightness”. Brightness and colorfulness are absolute measures, which usually describe the spectral distribution of light entering the eye, while lightness and chroma are measured relative to some white point, and are thus often used for descriptions of surface colors, remaining roughly constant even as brightness and colorfulness change with different illumination. Saturation = colorfulness/brightness = chroma/lightness.
8. National Television System Committee Used in NTSC - TV monitors, using one composite signal. RGB model requires 3 separate signals to form an image. It is based on the CIE and the XYZ colour models. NTSE: Analog television system used in most of North America, South America, Japan, South Korea, Taiwan, Burma, and some Pacific island nations and territories (see map). NTSC is also the name of the U.S. standardization body that developed the broadcast standard 7
9. Y I Q Luminance (Brightness information) Orange-Cyan hue Chromaticity Information (hue and purity) Green - Magenta 8 “Y” stands for Luminance “I” stands for inphase “Q” stands for quadrature referring to the components of the quadrature amplitude modulation
10. RGB YIQ [TV signal using NTSC encoder] 9 = YIQ RGB [TV signal using NTSC Decoder] = 9
12. RGB : It explores a wide range of colors Possible by mixing three colours… Constitutes of Red Green and Blue. but it fails to match the intuitions of human psychology. Why? Because, when we imagine a colour… our intuitions bring with it The aspects of lightness of the colour and the amount we use to colour a specific region. 11
13. Result: H S V H S L ue ue aturation aturation alue ightness Introduced in 1979 By Tektronix Inc … and has been used since then Mid 1970’s by pioneers of PARC and NYIT Discussed in Aug 1978 12
14. Application: >Aid selection >Colour Selection >ColourComparision >Modification of Colour >Image analysis …in all picture editing softwares and in designing. 13
15. HLS: Represented by a double hexagonal Cone, with WHITE at the top and BLACK at the bottom. The HUE lies on the circle, LIGHTNESSgradually increases from Black to White SATURATION increases from centre to the periphery 14
16. 15 Hue specifies the angle about the vertical axis that locates the specific hue. The colours are specified around the perimeter of the cone. Complementary colours are 180 degrees apart The vertical axis is called the “Lightness”
17. 16 Thank You. AnirbanSahaPh: 9903055542 Third year email: saha.a2006@gmail.com Computer Science and Technology Blog at: http://sahaanirban.wordpress.com Bengal College of Engineering and Technology Twitter: @sahaanirban