Data Representation - Images

Quality of an image depends on:

• Resolution
• Metadata
• Screen size
• Computer's speed

The density of pixels in an image file is known as:

• Resolution
• Dimensions.
• Transparency.
• Compression.

Resolution is measured in:

• Pixels per mm or per inch
• Print size.
• Milimeters.
• Bytes.

Identify a true statement:

• Image files can be compressed by setting pixels with similar colour to the exactly same colour.
• Compressing files improves their quality.
• Resolution doesn't affect the printed size of an image.
• Black and white images have colour depth of two bits.

Colour depth refers to:

• How many bits are used in a file to store colour information in every pixel
• Resolution divided by the number of colours in an image.
• Degree of file compression applied to an image file.
• Repeated resampling of an image.

Most graphic formats create many colours from:

• Red, green, blue.
• Red, pink, yellow.
• Red, white, blue.
• Black, white, green.

The smallest unit of data stored in an image file is called:

• Pixels
• Resolution
• Alpha
• Bitmap.

Alpha-channel present in some images refers to:

• Transparency of pixels.
• Quality of a file.
• The order in which alternative pixels are loaded.
• Degree of file compression applied to an image file.

A bitmap file is an example of raster graphics.

• True
• False

A bitmap file contains virtually unlimited number of colours.

• False
• True