Showing posts with label TONAL RANGE. Show all posts
Showing posts with label TONAL RANGE. Show all posts

Friday, February 28, 2020

QUALITY OF IMAGES IN DIGITAL AGE

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COLOUR AND LIGHTNESS QUALITIES OF DIGITAL IMAGES

Friends  in this post i am going to talk about the colors used in digital images or the images we get from digital machines.  

So let us start

The following terminology is helpful to know when learning about the types of digital images.

TONAL RANGE – It is also called dynamic range.  This term refers  to dark to light ranges or values in an image usually refered to as shadows midtones and highlights.  An image that contains all or most of the possible tones, rather than a smaller portion of the possible tones, Usually appeared  more details and said to have larger tonal range or dynamic range.   Tones may also reffered to as levels or intensities.

BRIGHTNESS LIGHTNESS LUMINOSITY LUMINANCE   -These terms refer to dark to light tonal characteristics, as opposed to color characteristics.  They can be thought of as describing the image as if the colors had been converted to blacks grays and whites

Hue – it is identified by the name of the color such as red orange and green.  The lightness or the darkness of the color is thought of separate from the hue.  Hue can be measured on location on the standard color wheel and expressed a degree as between 0 degree to 360 degree.

COLOR – in many instances of Photoshop color refers to the hue as a separate quality from dark to light tonal qualities.  For example it is common to say “the color in the image is good and its need to be stay the same but I need to make the changes in luminosity.”

But sometimes color refers to the overall qualities of a color – the hue component together with the lighter or darker components of the color.  For example, it is just as correct to say “that I will use the dark blue of the type”  as it is to say, “ I will use the dame blue color but one thast has a darker  luminosity for this type”.

SATURATION -  The strength or purity of the colour , or chroma saturation to represent the  amount of the hue in the color  to the amount of the black grey or white in the color.   If a color contains some black or gray it may look lighter muted and her pastel ; if it contains some white it may look lighter muted or pastel.  The maximum amount of hue, with no black gray or white mixed in would be purely and fully saturated and look like pure vivid color.  



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