1.2 Multimedia

Question 1

how is data for Bitmap image encoded

Answer 1

date of a bitmap image is encoded by assigning a solid color to each pixel then the bit patterns that are generated by considering each row of the grid as a series of binary color codes which corresponds to each pixels color are then mapped onto main memory

Question 2

pixel

Answer 2

smallest picture element whose color can accurately be represented by binary, the smallest identifiable part of a bitmap

Question 3

file header

Answer 3

Contains data about the bit map image

Eg dimensions, number of color(colour depth, image size

Question 4

Image resolution

Answer 4

The number of pixels per unit measurement
Pixels/cm

If image resolution increases then image is sharper/more detailed 

Question 5

Screen resolution

Answer 5

Product of width and height values for number of pixels on display

Width x height

E.g 1480x640

Question 6

Color depth/bit depth

Answer 6

Number of bits used to represent the colour of of a single pixel



Question 7

how to calculate file size/formula

Answer 7

File size= Number of pixels x colour depth