Definitions for "Binarization"
Scanners. An operation to process a multilevel input image (grey) into black and white dots. Some input images have variations caused by backgrounds and pictures, other images change due to shading caused by non uniform illumination or change or deterioration of the quality of the scanner lamp, such images are automatically binarized according to the brightness level of the background and local light shading information
Process of transforming an image such that each pixel is mapped to one of two values based on a threshold value. For example, any pixel with an intensity above the threshold value is mapped to white and any pixel below the threshold value is mapped to black, or vice versa.
A signal output from the CCD image sensor is an analog signal. To use the signal for various measurements and differentiations, the analog signal must be first converted into a digital signal. To convert from analog to digital, a threshold (binary level) is set for the signal from the CCD image sensor, as shown below. Areas brighter than the threshold are defined as "bright", and areas darker than the threshold are defined as "dark". Thus, all areas are defined as either "bright" or "dark". This process is termed binarization, and digital signals corresponding to "bright" are defined as "1" (= HI), and those corresponding to "dark" are defined as "0" (= LO). The intersection of the signal from the CCD image sensor and the threshold is termed "edge". Detection of this "edge" is applied for various measurements and differentiations.