Computer Art Theory Revision Quizs

How do you calculate image resolution? (Hint, it involves counting all the pixels for the width of the image and all the pixels for the height of the image)

• Image resolution = width + height

• Image resolution = width - height

• Image resolution = width x height

• Image resolution = width / height

What does the visible spectrum mean?

• All the colours the human eye can see.

• A range of wavelengths beyond human perception.

• The colors of light that are invisible to the naked eye.

• The spectrum of colors seen in a rainbow.

What does the Wand Select Tool in Pixlr Editor do?

• Selects colours the same or similar to those you click on.

• Erases the selected area from the image.

• Adjusts the brightness and contrast of the image.

• Crops the image to a specified size.

A GIF file (graphics interchange file) is often used for animations. What are its features?

• Only 256 colours

• Can display millions of colours

• Can be opaque only

• It uses lossy compression

What IS copyright?

• A legal right given to creators of original works that allows them to control the use of their work.

• A type of trademark that protects brand names and logos.

• A law that allows anyone to use any work without permission after a certain period.

• A guideline for ethical use of information in academic writing.

The RGB for green is?

• 0 255 0

• 255 0 0

• 0 0 255

• 255 255 0

Each bitmap is stored in the computer's memory as binary code. What colour does 1 represent in this black and white image? What colour does 0 represent?

• 1 represents white and 0 represents black

• 1 represents red and 0 represents blue

• 1 represents black and 0 represents white

• 1 represents green and 0 represents yellow

Using the Wand Select Tool to remove the background, should you choose low tolerance (32) for background colours that are the same or similar, or high tolerance (60) for background colours that are quite different?

• Low tolerance (32) for background colours that are the same or similar

• High tolerance (60) for background colours that are quite different

• Low tolerance (32) for background colours that are quite different

• High tolerance (60) for background colours that are the same or similar

If I use the Fill tool and click in the centre of this layer (this image), what will the fill tool do?

• It will fill that area with a single colour.

• It will create a gradient effect in that area.

• It will leave the area unchanged.

• It will apply a texture to that area.

PNG files (portable network graphic files) are really useful. What are their features?

• Up to 16 million colours

• Supports only 256 colours

• Lossy compression

• Smaller than jpegs