Exam-style question
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Explain the difference between resolution, colour depth and size in pixels for a bitmap. Include typical metadata that may also be stored in a bitmap file.
Model answer
What a good answer should say
- Size in pixels is the width of the image in pixels multiplied by its height in pixels.
- Resolution is expressed as the number of dots per inch, where a dot is a pixel.
- Colour depth is the number of bits stored for each pixel.
- A bitmap file may also contain metadata such as its width, height and colour depth.
Explanation
Why this works
These properties describe different aspects of a bitmap. Size in pixels describes the total number of pixels, resolution describes pixel density per inch, and colour depth describes the number of bits used for each pixel.
Metadata provides information about the image, including its width, height and colour depth.
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