Embedded Files
How is an image stored?
How is an image stored?
Images are stored on a computer as a series of binary numbers that represent the colour and location of each pixel in the image. Images are stored as a bitmap, where the image is divided into a grid of individual pixels, each of which is represented by a binary number. The number of bits used to represent each pixel determines the colour depth or bit depth of the image, which can range from 1 bit (black and white) to 24 bits (millions of colours). The image file format, such as JPEG or PNG, determines how the binary data is compressed and stored on the computer's hard drive.
What is metadata
What is metadata
Metadata for an image file refers to data about the image file itself, such as the file format, resolution, colour depth, creation date and time, and author, among others. This information is stored within the image file and is used by computer systems and software applications to identify and manage the image file.
Colour Depth
Colour Depth
Colour depth refers to the number of bits used to represent the colour of a single pixel in an image. A higher colour depth means a greater number of colours can be displayed
Resolution
Resolution
Photo resolution refers to the number of pixels (dots of color) in an image, which determines the level of detail and sharpness of the image. It is expressed as the number of pixels in width and height, for example, a resolution of 1920 x 1080 means the image is 1920 pixels wide and 1080 pixels tall. The higher the resolution of an image, the more detail it will contain, but also the larger the file size will be.
- image file size = colour depth x image height (px) x image width (px)
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