Sobel Operator
The Sobel operator is an algorithm for edge detection in images. Edge detection for those who are not familiar with the term, is an image processing technique to discover the boundaries between regions in...
Category: relation between pixels
relation between pixels
Detecting corners of image using Non-Maximum Suppression
Non-maximum supression is often used along with edge detection algorithms. The image is scanned along the image gradient direction, and if pixels are not part of the local maxima they are set to zero....
Color depth
Color depth is either the number of bits used to indicate the color of a single pixel, in a bitmapped image or video frame buffer, or the number of bits used for each color...
Euclidean distance
The Distance Formula Very often, especially when measuring the distance in the plane, we use the formula for the Euclidean distance. According to the Euclidean distance formula, the distance between two points in the...
connectivity and path
Paths A path from pixel p with coordinate (x, y) with pixel q with coordinate (s, t) is a sequence of distinct sequence with coordinates (x0, y0), (x1, y1), ….., (xn, yn) where :...
m-adjacency
Two pixels p and q with values from V are m-adjacent if : 1. q is in the set N4(p), or 2. q is in the set ND(p) and the set N4(p)∩N4(q) has...
pixels adjacency
Two pixels are adjacent if they are neighbors and their intensity level satisfies some specific criteria of similarity. Example (for binary images): In binary images, 2 pixels are adjacent if they are neighbors &...
8-neighbors of a pixel
The points ND(P) and N4(P) are together known as 8-neighbors of the point P, denoted by N8(P). Some of the points in the N4, ND and N8 may fall outside image when P lies...
Neighbors of a Pixel
Horizontal and Vertical neighbors Any pixel p(x, y) has two vertical and two horizontal neighbors, given by : (x+1, y), (x-1, y), (x, y+1), (x, y-1) This set of pixels are called the...