Shape domain |
descriptors of the three-dimensional size and shape of the ROI. |
These features are independent from distribution the gray in level the ROI intensity and are therefore only calculated on the non-derived image and mask |
1 |
1 |
2 |
First order |
Mean, standard deviation, median, and range; first-order differentials computed using Sobel operators |
Localize hypo- and hyperintense regions; gradients detect edges and quantify region boundaries |
1 |
1 |
1 |
Gray level co-occurrence matrix (GLCM) |
Localization of regions with significant intensity changes; gradients detect edges and quantify region boundaries |
Localizes regions based on underlying heterogeneity of voxel intensities |
3 |
7 |
6 |
Gray level run lenght matrix (glrlm) |
quantifies gray level runs, which are defined as the length in number of pixels, of consecutive pixels that have the same gray level value. |
In a gray level run length matrix the element describes the number of runs with gray level and length occur in the image (ROI) along angle |
2 |
3 |
6 |
Gray level size zone matrix (glszm) domain |
It is an advanced statistical matrix used for texture characterization. It estimates bivariate conditional probability density function of the image distribution values |
represent the count of how many times a given size of given grey level occur |
0 |
0 |
0 |