Bitmaps and Pixels. KS3

Computer Bitmap Images are made up of ....

• Pixars

• cells

• pixels

• bananas

Which of these are types of computer images ...

• xls file

• bmp file

• tiff file

• mp3 file

A computer image has dimensions 200 x 100.

It has (a)   pixels in it.

A Single pixel uses only 1 bit to store the colour. It can possibly be ...

• black or white only

• Any colour

• any shade of grey

• blue, green, pink or yellow

The colour of a pixel in a computer image can be found by looking at ...

• the amount of contrast in it.

• the file location on the server machine.

• the numbers given for Red, Green, Blue for that pixel.

• 3 numbers. One for brightness, one for colour, one for hedgehogs.

A computer image file is made up of lots of binary numbers. These numbers are made up of which 2 digits?

• 1

• 2

• 3

• 0

What do we call it when an image is lower quality and we can see boxes and jagged lines where the pixels are ?

• squared

• boxellated

• pixelled

• pixelated

• boxed

Which of these programs can create a bitmap (pixel) image file ?

• Excel

• Word

• Paint

• Powerpoint

Which of these image files has the highest resolution ?

• Picture of Cat 20 x 50 pixels

• Picture of dog with 700 pixels in the picture.

• Picture of house 90 x 9 pixels

• Picture of school. 20 pixels wide. 40 pixels high.

What information does a comp[uter need in order to open an image file ?

• Dimensions in pixels (Height, Depth)

• Colour Depth : How many bits are used for each pixel (which colours each number represents)

• How many white pixels are in the image

• The image's auther (Owner)