WorksheetsG6: Digital Images and Binary Encoding
Total questions: 10
Worksheet time: 5mins
Which statement best defines a pixel in a digital image?
Smallest unit of an image grid
A large block of color squares
A file that stores all images
A tool for drawing on screens
Match each term to its description.
Grid representation
Image made of rows and columns
Binary value 0
Represents black or off
Binary value 1
Represents white or on
Black and white image
Uses only two possible states
You have a 3×3 black-and-white image where 1 means white and 0 means black. If the middle row is 1 1 1 and all other cells are 0, which description matches the picture?
A white horizontal stripe across middle
A white vertical stripe down center
A full white square everywhere
A white corner dot only
Which statement best describes additive color in the RGB system?
Colors appear by subtracting red from blue light
Colors appear by combining red, green, and blue light
Colors appear by filtering white light through paint
Colors appear by mixing black with white and gray
Match each RGB storage term to its meaning.
Data range
Values allowed for each color, like 0–255
Bit depth
Number of bits used for one channel
Bits per pixel
Total bits used across red, green, and blue
Channel value
Specific number stored for red, green, or blue
A pixel uses 8 bits for red, 8 bits for green, and 8 bits for blue. How many total bits represent that pixel?
8 bits in total for the pixel
16 bits in total for the pixel
24 bits in total for the pixel
32 bits in total for the pixel
You want to store no blue but maximum red and green in RGB. Which set of channel values fits this goal?
R=0, G=255, B=255
R=255, G=255, B=0
R=255, G=0, B=255
R=128, G=128, B=128
Which statement best describes the hex color format used on computers?
It uses #rrggbb with two hex digits per channel
It uses #rgb with one decimal digit per color
It uses r,g,b values without any symbol
It uses #bbbbbb where b means binary digits
Match each color with its common hexadecimal code.
Red
FF0000
Green
00FF00
Blue
0000FF
White
FFFFFF
Black
000000
A purple shade has RGB values (156, 54, 255). What is its hex code? Use two hex digits per channel.
#9C36FF
#FF369C
#9CFF36
#369CFF
