Name:
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Jessica Stephens
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Student Number:
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X00147734
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GIMP:
Chapter 8: Color
PART 1: READ
Chapter 2 in the GIMP book, then:
- Answer
all questions below, briefly but completely.
- Change
the color of the answer to BLUE.
- Copy this information and paste
in a new post in your DIGITAL GRAPHICS blog.
1.
Briefly
define the following color terms:
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·
Additive
color Combination of red, green, and blue
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·
Subtractive
color Adding shades on a reflecting surface.
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·
HSV
color Hue, saturation, and value.
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·
CMYK
color Adding True Black.
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2.
What
is the relationship between additive and subtractive color? Work as mirrors.
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3.
How
many bits do most computers
use to represent color? 24 Bit
See the Important Note below regarding bit color.
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4.
What
is the TRIANGLE COLOR SELECTOR used for? Picking
a color and changing the saturation and value.
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5.
What
is the WATER COLOR SELECTOR used for? Mixing
multiple colors.
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IMPORTANT
NOTE:
In GIMP, the bit break-down is:
·
RGB Channel: 8 bits for RED, 8 bit for GREEN, 8 bits for BLUE
·
ALPHA Channel: 8 bits for TRANSPARENCY
About TRANSPARENCY :
An Alpha value indicates the transparency of a pixel. Besides its
Red, Green and Blue values, a pixel has an alpha value. The smaller the alpha
value of a pixel, the more visible the colors below it [the greater the
transparency]. A pixel with an alpha value of 0 is completely transparent. A
pixel with an alpha value of 255 (or Hex ff)
is fully opaque.
With some image file formats, you can
only specify that a pixel is completely transparent or completely opaque
[JPGs are always opaque]. Other file formats allow a variable level of
transparency [such as GIF and PNG].
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PART 2: GIMP PROJECT:
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1.
HEX Web Colors: Go to this link to find more about web
colors: http://en.wikipedia.org/wiki/Web_colors
From the information in this Wiki article, analyze the following
hex values and describe what color of each (the first is done for you):
A.
#cc22cc Color: purple (Notice
the high RED and high BLUE values)
B.
#ff0000 Color: True red
C.
#0000bb Color: True blue
D.
#000000 Color: Black
E.
#11ff11 Color: Lime
F. #999999 Color: Gray (What
color is it when all the hex digits are the same?)
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2.
HEX Web Colors Image:
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Now
open GIMP and create a new 600 X 600 art canvas.
·
Choose
the BRUSH Tool.
·
Click
on the Foreground Color Picker at the bottom of the
Toolbox and type in the first color (#cc22cc)
from the list above.
·
Use
a calligraphic brush to draw out the word PURPLE across the canvas. See
the sample here à
·
Create
a new layer.
·
Now
enter the second color above (#ff0000)
in the Color Picker, and draw out the appropriate color word with the
Brush on the new layer.
·
Continue
adding new layers with the appropriate color names for each of the colors
above. (The color words can overlap, be
at angles, be different sizes, different transparencies, etc. You can also
add brush decorations, shapes, etc. if you like to create an interesting,
attractive image.)
·
Save
the image as a JPG in your GIMP folder with the file name Hex Colors
·
Delete
the sample image (“Purple”) and insert your own Hex
Colors image here:
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3.
Color Adjustments:
·
Click
on the PHOTOS FROM THE BOOK link, and scroll down to see the images for
Chapter 2.
·
Download
and save these images: Yosemite Storm,
the yellow flower, Dave (image of man at a table, right after the yellow
flower image), and the Shakespeare
page.
·
With
the images you downloaded, follow the instructions in pages 303 through 319 to adjust various color properties. You do not have to complete the entire
chapter; you may stop just before Indexed
Color on page 219. (Of
course, you are more than welcome to complete the chapter if you like.)
·
After
the adjustments, save the final version of the images, then insert the
final adjusted images here:
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Yosemite Storm:
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Having issues Opening Image. Will Update
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Yellow Flower:
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Having issues Opening Image. Will Update
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Dave:
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