Archive for the ‘Digital Imaging’ Category

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 […]


The most commonly used digital image format is JPEG. It is universally compatible with viewers browsers, and image editing software, it allows photographic images to be compressed up to 10 to 20 times compared to the uncompressed original with very little visible loss in image quality.


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 […]


As we’ve talked in the previous topics about sensors and pixels, each photo is composed of a number of pixels. Each of these pixels have a certain level of brightness, ranging from 0 (black) to 255 (white). A histogram is a graphical representation of these levels of brightness for the entire photo.


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