A technique used primarily with surface rendering, in which a density value of the interface between two materials in the dataset is selected so that the interface surface can be identified for rendering. [KAU91
The assigning of a binary value to a pixel based on whether its intensity falls below, or above a threshold value.
The XIL library's thresholding function sets all the values (in a band) that fall between a low threshold and a high threshold to a value (called a map value) that the programmer specifies.
Thresholding is one way to try and separate useful information out of raw data. In medical imaging, this might mean finding a bone in a CT scan of the leg. It works by taking the range of grey shades in an image and redrawing it with only two colours. All shades darker than the threshold value become black, whilst those lighter become white.
when converting a pixel from grayscale to black and white, the threshold is the gray value above which will be considered white, and below or equal to which will be considered black.
(n.) The process of producing greater contrast in a gray-scale image. Each pixel is assigned a value. The value 1 is assigned if the image portion of the pixel represents is at or above a specified gray level (the threshold). The value 0 is assigned if the image portion is below that threshold. The result is a high-contrast, black-and-white image that highlights certain features.
A point operation that maps all the pixel values of an image that fall within a given range to one of a set of per-band constants.
The process of converting gray scale image into a binary image. If the pixel's value is above the threshold, it is converted to white. If below the threshold, the pixel value is converted to black.
Scanners. The process of rendering all areas darker than a certain value as black, and all lighter areas as white. Used to convert greyscale images to black and white.
Thresholding is the simplest method of image segmentation. Individual pixels in a grayscale image are marked as 'object' pixels if their value is greater than some threshold value (assuming an object to be brighter than the background) and as 'background' pixels otherwise. Typically, an object pixel is given a value of '1' while a background pixel is given a value of '0'.
