La forma y formalidades.

The format and size of the segmented, output, image is an MxN matrix. This was stored as digital graphics image of jpg format using MATLAB write command. A number of other output tables was generated and stored as MATLAB binary (Mat) data files. They include:

(i) Image Sample Intensity Frequency Distribution File: Freqdistfl.mat

This file with format shown in Table 3.1 is used to store the frequency distribution data for the image file being analyzed to determine the pixel intensity that has the highest occurrence or dorminant. It has two fields, pixelintsval, which stores he values of the pixel intensity whose occurrence is to be accumulated in the second field, freqintsval, frequency of the intensity value.

Table 3.1 Image sample intensity frequency distribution file format

VariableName Class Pixelintsval double Freqintsval double

(ii) Area of Segmented Image Samples File: Areasegfl.mat

The file contains the area in no of pixels for the proposed algorithm segmented image stored in the field, Areainpixelsys as well as that of the expert segmented image stored in Areainpixelexp. The image file name is stored in the field, imagfilenam. The file format is shown in Table 3.2

Table 3.2 Area of segmented image sample file format VariableName Class

Imagfilenam char Areainpixelsys double Areainpixelexp double

(iii) System Image Malignant Location/Zones Identification File: SysMalgzonfl.mat

File keeps record of all malignant (hypoechoic) pixels coordinates identified during image segmentation using axial scanning region growing algorithm. The pixel location coordinates are stored for each file, imagefilenam, in the fields, pixelcolsys and pixelrowsys.This file with format shown in Table 3.3, stores the names of the zones for each location of the prostate gland identified as malignant (hypoechoic regions) by the proposed algorithm in the field, zoneidsys. The corresponding pixel coordinates are stored in pixelcolsys and pixelrowsys. The zoneidsys updated from lookup table by processing.

Table 3.3 System Image malignant location/zones identification file format VariableName Class

Imagfilenam char

Pixelcolsys double Pixelrowsys double

Zoneidsys char

(iv) Expert Image Malignant Location/Zones Identification File: ExpMalgzonfl.mat

This file with format shown in Table 3.4 stores the names of the zones of the prostate gland identified as malignant by the expert manual method in the field, zoneidexp. The corresponding pixel coordinates are stored in pixelcolexp and pixelrowexp. This file is generated by processing the image file marked by expert. The zoneidexp is updated from lookup table, Gldcodzonlkuptb.mat.

Table 3.4 Expert image malignant location/zones identification file format VariableName Class

Imagfilenam char Pixelcolexp double Pixelrowexp double

Zoneidexp char

(v) Gland Coordinate Zone Lookup Table File: Gldcodzonlkuptb.mat

This file whose format is shown in Table 3.5 stores the zone identity generated during processing for all coordinates within the gland region for a given image. It will serve as a lookup table for converting the coordinates of the malignant pixels to zones they fall in and the zoneidsys or zoneidexp filled in the malignant file.

Table 3.5 Gland coordinate zone lookup table file format VariableName Class

Imagfilenam char Pixelcolimg double

Pixelrowimgl double

Zoneid char

(vi) Image Samples Edge Coordinates File: Sysedgcoodfl.mat

This file contains the coordinates of the pixels of the image at the edges or borders of the segmented image file. The format is shown in Table3.6. It is made up of three fields, imagefilenam to store the name of the image file, pixelcolbnd and pixelrowbnd to store the column and row coordinates of the pixels at the edges. The coordinates can be used to trace a curve along the edges of the image.

Table 3.6 Image samples edge coordinates file format VariableName Class

Imagfilenam char Pixelcolbnd double Pixelrowbnd double

(vii) System Segmented Image Coordinates File: Sysegcoodfl.mat

File contains the pixel coordinates of the pixels bound by the proposed algorithm segmented prostate gland for each image file. It is made up of three fields, imagefilenam to store the name of the image file, pixelcolalg and pixelrowalg to store the column and row coordinates of the pixels at the edges. This file is generated during segmentation by the proposed algorithm. The count of these coordinates gives the area of segmented prostate gland in pixels. The format is shown in Table 3.7.

Table 3.7 System segmented image coordinates file format VariableName Class

Imagfilenam char Pixelcolalg double

Pixelrowalg double

(viii) Expert Segmented Image Coordinates File: Expsegcoodfl.mat

File contains the pixel coordinates of the pixels bound by the expert segmented prostate gland for each image file. It is made up of three fields, imagefilenam to store the name of the image file, pixelcolexp and pixelrowexp to store the column and row coordinates of the pixels at the edges. This file is produced by processing the expert segmented images. The file format is shown in Table 3.8.

Table 3.8 Expert segmented image coordinates file format VariableName Class

Imagfilenam char Pixelcolexp double Pixelrowexp double