19. Digital images are often represented by the red, green, and blue values (an
RGB triplet) of each individual pixel in the image. A photographer is
manipulating a digital image and overwriting the original image. Which of the
following describes a lossless transformation of the digital image?
(A) Compressing the image in a way that may lose information but will suffer only
a small loss of image quality.
(B) Creating the gray scale of an image by averaging the amounts of red, green,
and blue in each pixel and assigning this new value to the corresponding pixel in
the new image. The new value of each pixel represents a shade of gray, ranging
from white to black.
(C) Creating the negative of an image by creating a new RGB triplet for each pixel
in which each value is calculated by subtracting the original value from 255. The
negative of an image is reversed from the original;
light areas appear dark, and colors are reversed.
(D) Modifying part of the image by taking the pixels in one part of the picture and
copying them to the pixels in another part of the picture.
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