The high-pass filtering process, also known as edge enhancement
or sharpness, is intended to sharpen an input image in the spatial domain that appears blurred.
The chapter on digital image processing is now two chapters on preprocessing and postprocessing, with new material on the limitations of digital features like smoothing and edge enhancement
. A new chapter on picture archiving and communication systems has been added, and the chapter on qualities of the radiographic image is now two chapters on visibility and geometrical qualities.
On the other hand, the noise suppression can be an annoying problem during the process of edge enhancement
. Therefore, a technique combining kernel regression and local homogeneity is proposed in .
The software can perform edge enhancement
, image mirroring and image binning in the vertical and horizontal directions, as well as hot pixel correction.
It comes equipped with three separate image inputs along with a new image processing system containing Auto Picture Control, Dynamic Auto Gamma Correction, and a new Vertical Horizontal Edge enhancement
But in radiology, it's called the "Mach band," a form of optical illusion or visual edge enhancement
produced by the normal physiologic processes of the human eye.
Processing tools such as edge enhancement
and pixel windowing can be used to refine images and bring out details. The brightness and sharpness can be manipulated to fine-tune an image that might otherwise require a patient to be reexamined.