Multitude Regional Texture Extraction for Efficient Medical Image Segmentation

International Journal of Humanities and Social Science Invention
ISSN (Online): 2319 – 7722, ISSN (Print): 2319 – 7714
www.ijhssi.org ||Volume 5 Issue 11||November. 2016 || PP.14-18
www.ijhssi.org 14 | Page
Multitude Regional Texture Extraction for Efficient Medical
Image Segmentation
Dr.S. Rizwana
Assistant Professor Department of Computer Science Erode Arts and Science Collegeerode
ABSTRACT: Image processing plays a major role in evaluation of images in many concerns. Manual
interpretation of the image is time consuming process and it is susceptible to human errors. Computer assisted
approaches for analyzing the images have increased in latest evolution of image processing. Also it has
highlighted its performance more in the field of medical sciences. Many techniques are available for the
involvement in processing of images, evaluation, extraction etc. The main goal of image segmentation is cluster
pixeling the regions corresponding to individual surfaces, objects, or natural parts of objects and to simplify
and/or change the representation of an image into something that is more meaningful and easier to analyze.
The proposed method is to conquer segmentation and texture extraction with Regional and Multitude and
techniques involved in it. Ultrasound (US) is increasingly considered as a viable alternative imaging modality
in computer-assisted brain segmentation and disease diagnosis applications.First for ultra sound we present
region based segmentation.Homogeneous regions depends on image granularity features. Second a local
threshold based multitude texture regional seed segmentation for medical image segmentation is proposed.
Here extraction is done with dimensions comparable to the speckle size are to be extracted. The algorithm
provides a less medical metrics awareness in a minimum user interaction environment. The shape and size of
the growing regions depend on look up table entries.
I. INTRODUCTION
In Image processing the inputs is mainly an image photograph or video frame. The output after image
processing will be either an image or set of characteristics of parameters related to the image. Image
segmentation is one of the important aspects in processing of image. Its work is clustering the pixels and
changes the representation into some meaningful images. Image segmentation is typically used to locate objects
and boundaries (lines, curves, etc.) in images. This usually results in set of segments that collectively cover the
entire image.There are many types of image segmentation available here. Some of them are Edge detection,
Region boundaries, Region Growing, Thresholding etc., Region boundaries and edges are closely related. So
this has been used as the bade of another segmentation technique. If no edges are detected, the neighboring
pixels are examined and added to a region class. This process is iterated for each boundary pixel in the region. If
adjacent regions are found, a region-merging algorithm is used on weak edges are dissolved and strong edges
are left in tact.The major advantage of Region growing over conventional segmentation is the borders of regions
found by region growing are perfectly thin and connected. And also the algorithm is very stable with respect to
noise. The important thing is that membership in a region can be based on multiple criteria. We can take
advantage of several image properties, such as low gradient or gray level intensity value, at once.
II. LITERATURE WORKS
In image segmentation we have a simple method called thresholding. The method is based on a clip-
level (or a threshold value) to turn a gray-scale image into a binary image.The key of this method is to select the
threshold value (or values when multiple-levels are selected). In image processing we have a well-developed
field called Edge detection. There is a sharp adjustment in intensity in region boundaries so they are closely
related. Edge detection techniques has been the base of all segmentation technique. The edges identified by edge
detection are often disconnected. Closed region boundaries are necessary to segment an object from an image.
Region Growing is an approach to image segmentation in which neighboring pixels are examined and added to a
region class if no edges are detected. This process is iterated for each boundary pixel in the region. If adjacent
regions are found, a region-merging algorithm is used on weak edges are dissolved and strong edges are left in
tact. Region Growing offers several advantages over conventional segmentation techniques. Unlike gradient
and Laplacian methods, the borders of regions found by region growing are perfectly thin (since we only add
pixels to the exterior of our region) and connected. The algorithm is also very stable with respect to noise. Our
region will never contain too much of the background, so long as the parameters are defined correctly. Other
techniques that produce connected edges, like boundary tracking, are very unstable. Most importantly,
membership in a region can be based on multiple criteria. We can take advantage of several image properties,
such as low gradient or gray level intensity value, at once. Hybrid method uses both boundary based and region
growing method.

Multitude Regional Texture Extraction for Efficient Medical Image Segmentation
III. REGION BASED TEXTURE EXTRACTION METHOD
Segmentation is usually a process of partitioning a digital image into multiple segmentsThe major
objective of segmentation is to simplify and/or change the representation of an image into something that is
more meaningful and easier to analyze. . Image segmentation is typically used to locate objects and boundaries
(lines, curves, etc.) in images. In short we can say, image segmentation is the process of assigning a label to
every pixel in an image such that pixels with the same label share certain visual characteristics. As said earlier
Region Growing offers several advantages over conventional segmentation techniques. Here the borders of
regions are perfectly thin and connected. The algorithm is very stable with respect to noise. Until the parameters
are defined correctly the region never contains too much of background. Most importantly, membership in a
region can be based on multiple criteria. The image properties such as low gradient or gray level intensity value
are also taken into account.
The imaging is non-ionizing, fast, portable, inexpensive and capable of real time imaging. The images
typically contain significant speckle and other artifacts which complicate image interpretation and automatic
processing. The speckle formation is one in which the images of relatively poor quality and analysis in general
is described. The speckles mask the low contrast lesion and reduce the ability of radiologist to resolve the actual
information. It is difficult to segment the ultrasound image to detect objects with the correct position and shape
because of speckle formation. In addition, boundary edges are usually incomplete, missing or weak at some
places. For the ultrasound medical image segmentation, mostly the methods are focused on five main
approaches, namely, threshold technique, boundary-based method, region based methods, hybrid techniques
which combine boundary and region criteria and active contour based approach.Threshold is a technique where
decision is based on local pixel information. This is an effective method when the intensity levels of the objects
fall squarely outside the range of levels in the background. In Edge – based methods the weakness in connecting
together broken contour lines make them, too, prone to failure in the presence of blurring. In active contour
model, the main idea is to start with some initial boundary shape represented in the form of spline curves and
iteratively modifies it by applying various shrink/expansion operations according to some energy function.
The Region – based texture extraction method usually done by partitioning the image into connected
regions by grouping neighboring pixels of similar intensity levels. Then adjacent regions are merged. Over
stringent criteria create fragmentation; lenient ones overlook blurred boundaries and over merge. Hybrid
techniques using a mix of the methods above are also popular. In our paper, a local threshold based multitude
texture regional seed segmentation for medical image segmentation is proposed. Here, for local statistics, lookup
table is prepared to use in initial region. Then pixels are grouped that satisfy a specify homogeneity criteria.
Finally it produces a homogeneous region, and merging the neighboring regions, which have similar intensity
values. Algorithm implementation is done by using seeded region growing procedure where each pixel is taken
as seed point. The shape and size of the growing regions depend on look up table entries. The region merging is
done after the region growing. This suppresses the high frequency artifacts. The merged regions output will be
in the form of segmented image with higher efficiency than watershed method. The less noise sensitive pixel is
produced in SRG algorithm. It also allows a segmentation of the accurate homogeneous regions compared with
morphological filter segmentation.
IV. MULTITUDE REGIONAL IMAGE SEGMENTATION
The next proposal is applying texture feature-based multitude regional image segmentation on Medical
images. Less medical metrics awareness in a minimum user interaction environment is provided in the proposed
system. This helps in batch work and to the novice computer users. The usage of 2D semi-automatic SRG with
texture feature is deployed in medical image segmentation. Feasible texture feature in medical image
segmentation are found after comparing with morphological filter and watershed methods For medical images
local threshold selection based segmentation procedure has been developed. Look up table controls the
preserved medical images that consist of homogeneity and statistical values of each pixel. 11 x 11 window size
is used for computation of local statistics. This choice is based on the small homogeneous regions, which are
produced by the granularity. The window size must be large enough for the measurement of homogeneity
region criteria and statistical similarity bound. The parameter selection of the similarity bound depends on the
granularity or speckle into the images. The initial growing region shows the large number of false homogeneous
region into the image, which was joined with their neighboring region by merging. The parameters for merging
criteria depend on the high frequency artifacts such as over segmentation. This algorithm can be used for fully
developed speckle images with efficient segmentation. The merged regions reduce over segmentation without
using further smoothing into the image. The final segmentation results exhibit accurate homogeneous regions
without implementing texture-based analysis.
4.1. Architecture
The diagram 4.1 given below illustrates how the image is segmented provided with the input training
images. When trained with input data from image, intensity ranges and RGB and an alpha value is applied as

input to the features extracted from the training images. The color-corrected RGB image is then converted to
image features which is more suitable for determining the borders between regions. For intensity ranges some of
the popular approaches are the threshold techniques, edge-based methods, region-based techniques and
connectivity-preserving methods are adopted. Our multitude region-based method usually works as follows: the
training image is further divided into regions by way of grouping the neighboring pixels that has the similar
intensity ranges. The regions that are adjacent to the pixels are then merged based on some criterion such as the
RGB value or the alpha distribution value obtained. Texture extraction is the identification of regions based on
their texture. We have also shown that the texture extracted can also be used for certain tasks such as region
segregation and region outliers. The texture extracted in applied for multitude of texture pixels with the
function MultiTexture. The resultant image obtained is the segmented image.
Fig1. Architecture of segmented image
4.2. Mathematical formulation Image Features
Consider a finite training set of images S = {s1,s2,…sn } and can be represented by a set D.
Σ ( 1 / 2 | si + D άi | + λ (RGB)i _______________ ( eqn 1)
i = 1 ,2…n
Where λ denotes the intensity ranges and άi denotes the alpha distribution and (RGB)i gives the RGB value for
a single image
Texture Extraction
Texture extraction is done in two steps using the set D and summing it up. It is learned using S = {s1,s2,…sn} .
where Si, i = 1.2,….m are the patches extracted with size d * d .from texture images in training set.
Sum up for all the coefficients for particular texture
T(S) = Σ i=1,
n
( άi ) _______________ (eqn 2)
Region Outlier & Segregation
Outlier rate = (x / n ) * 100 ______________ (eqn 3)
Where x denotes the number of outliers found and n denotes the total number of training images.
Multitudes of Texture Pixels
Texture coordinate Cά between two pixels C0 and C1 is given by
Cά = ( 1 + ά )C0 + άC1 _____________ (eqn 4)
4.3. Algorithm
Algorithm Multitude Regional Texture Extraction for Efficient Medical Image Segmentation Input a
finite set of training images
Assignment of the set denote D
Loop
For S = {s1,s2,…sn } where i = 1,2,…n

Perform Σ ( 1 / 2 | si + D άi | + λ (RGB)i
Exit
Evaluate Texture extraction
For S = {s1,s2,…sn} where I = 1,2,..n
Perform d * d
Perform T(S) = Σ i=1,
n
( άi )
Exit
Evaluate Segmented Image
Perform Outlier rate = (x / n ) * 100
Perform (Texture coordinate) Cά = ( 1 + ά )C0 + άC1
Exit
End loop
V. EXPERIMENTAL RESULTS ON MULTITUDE REGIONALTEXTURE EXTRACTION
The experimentation conducted on bladder images to evaluate the performance of proposed local phase
and threshold texture extraction for future bladder segmentation. Implementation of the proposed algorithm is
done in MATLAB. In addition to noise removal, the proposed model also present qualitative results for the
texture extraction of the bladder image edges. The localization accuracy of bladder surface detection technique
and assessing the accuracy of measuring relative inner layers of separation is a clinically relevant task for which
the system uses 2D imaging. The screen shots of the bladder in this proposed technique is shown in figure given
below.
Fig 1. a) Input Image b) Binary Image c) Gradient Image d) Threshold value of Gradient image e)Threshold
level segmented Image
The datasets used here are segmented homogeneous region, number of images and number of pixels in
segmented region. The experimentation presented here gives a specify homogeneity criteria and produce the
homogeneous region, and merging the neighboring regions, which have similar intensity values. This can be
especially helpful for batch work or to novice computer users. The deployment of medical image segmentation
is used as a 2D semi-automatic SRG with texture feature. They are compared with the morphological filter
(12% less homogeneous regions) and watershed methods (15% less homogeneous pixels) and found to be a
feasible texture feature in medical image segmentation. Seeded region growing procedure algorithm is
implemented where each pixel is taken as seed point. The shape and size of the growing regions depend on look
up table entries. Look up table also consists of homogeneity and statistical values of each pixel. The less noise
sensitive pixel is produced in SRG algorithm. 11 x 11 window size is used for computation of local statistics.
The merged regions reduce over segmentation. Further smoothing into the image is not needed here. The final
segmentation results exhibit accurate homogeneous regions without implementing texture-based analysis
The performance of the datasets that are compared with the existing system with segmented homogenous region
and normal segmented region of
Threshold technique is given below.

VI. CONCLUSION
In threshold technique, because spatial information is ignored, however, blurred region boundaries can
create havoc. In Edge-based methods there is a weakness in connecting together broken contour lines make
them, too, prone to failure in the presence of blurring. The region merging which is done after the region
growing suppresses the high frequency artifacts. The region that is merged output will be in the form of
segmented image with higher efficiency than watershed method. In region based methods. Over stringent
criteria create fragmentation; lenient ones overlook blurred boundaries and over merge. Hybrid techniques using
a mix of the methods above are also popular. Medical imaging, the resulting contours after image segmentation
can be used to create 3D reconstructions with the help of interpolation algorithms. The algorith developed is
fully speckle images with efficient segmentation. The merged regions reduce over segmentation without using
further smoothing into the image. Edge detection is a well-developed field on its own within image processing.
Region boundaries and edges are closely related, since there is often a sharp adjustment in intensity at the region
boundaries. Region Growing offers several advantages over conventional segmentation techniques. Thus as a
conclusion an accurate homogeneous regions without implementing texture based analysis is resulted.
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Multitude Regional Texture Extraction for Efficient Medical Image Segmentation

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