Posts Tagged ‘digital image’

RAW Images

A RAW file contains the original image information as it comes off the sensor. No in-camera processing is applied. This will be done afterwards on your PC with special software. TIFF file only retains 8 bits per channel of information but it will take up twice the storage space because it has three 8 bit color […]


Interpolation is an imaging method to increase or decrease the number of pixels in a digital image. Many compact cameras uses interpolation to produce a larger image than the sensor captured or to create digital zoom. Almost all image editing software support one or more methods of interpolation, the quality of the final image and […]


All the pixels in a photo have certain level of brightness ranging from black to white. These values of the pixels serve as the input for the computer monitor. Due to technical limitations, CRT monitors output these values in a nonlinear way: Output = Input ^ Gamma


There are two ways in which digital images can be compressed: lossless and lossy. Lossless Compression Lossless compression is similar to what WinZip does. For example, if you compress a document into a ZIP file and later extract and open the document, the content will be identical to the original. No information is lost in […]

Color Spaces

A color space (or color model) is an abstract mathematical model describing the way colours can be represented as groups of numbers, typically as three or four values or color components (e.g. RGB and CMYK are color models). The Additive RGB Colors The cells inside our eyes (called cone-shaped cells) are sensitive to red, green, […]