WorksheetsPearson 1CP2 - 2.2 - Image Representation
Total questions: 17
Worksheet time: 9mins
A bitmap is a digital image composed of a matrix of tiny blocks of colour
called...
What do we call a digital image composed of a matrix of tiny blocks of colour
called picture elements or pixels?
Vector
CAD
Bitmap
Square Matrix
Every pixel on a computer screen is made from...
The size of an image (in pixels) is calculated by...
The resolution of an image means...
The number of pixels displayed per inch
The colour depth of an image means...
An image with a colour depth of 2 is able to display...
An image with a colour depth of 3 is able to display...
An image with a colour depth of 4 is able to display...
An image with a colour depth of 8 is able to display...
The greater the number of bits to represent the colour depth of an
image, the more...
colours can be represented
The colour depth of an image is the number of bits used to...
Encode the
colour of each pixel
What is the formula for calculating the file size (in bits) of an image?
What is the formula for calculating the file size (in bytes) of an image?
file size = image width * image height * color depth / 8
file size = image width - image height + color depth / 8
file size = image width / image height * color depth / 8
file size = image width + image height + color depth / 8
The formula for image size in bits is width (in pixels) X height (in pixels) X colour depth. What must we do to get the size in kibibytes?
Multiply the size in bits by 8 and then by 1024
Add the size in bits to 8 and then to 1024
Subtract the size in bits 8 and then by 1024
Divide the size in bits by 8 and then by 1024
The formula for image size in bits is width (in pixels) X height (in pixels) X colour depth. What must we do to get the size in mebibytes?
Multiply the size in bits by 8 and then by 1024, and then by 1024 again
Add the size in bits to 8 and then to 1024, and then to 1024 again
Subtract the size in bits 8 and then by 1024 and then by 1024 again
Divide the size in bits by 8 and then by 1024 and then by 1024 again
What is the disadvantage of increasing either the resolution, colour depth or size of an image?
