DIGITAL IMAGES, DIGITAL IMAGES QUALITIES A SHORT NOTE:
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.”
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