Bitmap representation, Study notes of Computer science

Notes on bitmap - images, use of bits to represent information

Typology: Study notes

2018/2019

Uploaded on 12/21/2019

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Bitmap Graphics - a collection of pixels from an image mapped to specific memory locations
holding their binary colour value
Pixel - the smallest possible addressable area defined by a solid colour, represented as
binary, in an image
Image Resolution - how many pixels an image contains per inch/cm
Screen Resolution - the number of pixels per row by the number of pixels per column
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Bitmap Graphics - a collection of pixels from an image mapped to specific memory locations

holding their binary colour value

Pixel - the smallest possible addressable area defined by a solid colour, represented as

binary, in an image

Image Resolution - how many pixels an image contains per inch/cm

Screen Resolution - the number of pixels per row by the number of pixels per column

Colour depth - The number of bits used to represent the colour of a single pixel

Calculating file size for different colour depths

All the images above are of the same resolution:

300*225 = 67500 pixels

Monochrome

If the first image uses 1 bit to store the colour for each pixel, then the image size would be:

(256 colours) (24-bit colour) (Monochrome) (16 colour)

File Identifier

File Version

Number of lines

Number of pixels per line

Number of bits per pixel

Compression type

Origin of the image

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