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 […]
Archive for the ‘Digital Imaging’ Category
RAW Images
March 23rd, 2011 
Andrei 
Posted in Digital Imaging 
Tags: digital image, jpeg, photoshop, raw, tiff 
Comments Off on RAW ImagesJPEG
March 21st, 2011 Andrei 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
March 7th, 2011 Andrei 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 […]
Posted in Digital Imaging Tags: digital image, digital zoom, interpolation Comments Off on InterpolationHistogram
March 4th, 2011 Andrei 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.
Gamma
March 2nd, 2011 Andrei 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
