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Image Segmentation Write For Us

Image Segmentation Write For UsIn digital image dispensation and computer vision, image segmentation divides a digital image into multiple segments (sets of pixels, also called image objects). The goal of segmentation is to simplify and change an image’s appearance to something more meaningful and easier to analyze.  Image segmentation is commonly used to locate objects and boundaries (lines, curves, etc.) in images. In particular, image segmentation is the process of assigning a label to each pixel in a photo so that pixels with the same brand have specific characteristics.

The result of image segmentation is a set of segments that together cover the entire image or a group of contours extracted from an image (see Determining Edges). Each pixel in an area is like a computed characteristic or property, such as color, intensity, or texture. Adjacent regions differ significantly in color from the same object. When applied to a stack of images typical of medical imaging, the resulting contours after image segmentation can create 3D reconstructions using interpolation algorithms such as walking cubes.

Difficulties in segmentation

Segmentation is by no means a straightforward process, whether choosing the best method of segmentation or validation. We have manually performed this manual segmentation illustrated above. We have found that there can be severe problems. Therefore, analyzing this type of image, some difficulties that even make an accurate fish count impossible.

We found that these images are characterized by large numbers of overlapping fish, making it difficult to understand the method when one or more fish are present. Likewise, some fish are partially obscured by some underwater features, making it even more difficult to count them accurately.

He will likely say, “what a poorly chosen example.” The truth is, we found it interesting because it reflects very well the problems we face in developing a vision system. Often we see examples like a horse in a field in a very well rendered image with good contrast and a well-trained horse. But the truth is that we ​​need to be prepared for any problems that arise in real life.

What segmentation methods are there in the literature?

There are many segmentation techniques. The most notable are the threshold creation, the division and merge algorithms, the zone fill algorithms, the watershed algorithm, or the deformable models. Each of them will or will not work on a specific problem. The only way to find out is to check it out in a practical way.

It should be noted that basic image segmentation techniques are already implemented in libraries such as OpenCV or Scikit-Image, which are available for Python and are very easy to install using package management systems such as pip.

How is this checked, and why is it so difficult?

The primary segmentation, commonly referred to as fundamental truth, is necessary to verify that the segmentation is correct. This whole truth has to obtained manually by painting the silhouettes of the objects of interest in a uniform color. You might think this is a very tedious process. and indeed it is.

Obtaining these fundamental truths often referred to as “manual image labeling” or, in this case, “manual image segmentation.” Because it is such a tedious process, such data is absent. For example, very often, only 50 of these 500 cited images were tagged. As we’ll see later, this is a severe problem for deep learning networks.

We manually segmented the image shown above to give you an idea pretty roughly, and it was already rather tedious. We also convinced that some fish escaped us in the process, and they probably fell in an area with shallow light. Again, this is important because of the difficulty of manually segmenting the images and, most of all, the boredom if there weren’t one or many more.

The point is that in a hypothetical case, if we have a sufficient number of tagged images, that fundamental truth is compared to machine vision segmentation, using many indicators that assess the accuracy with which image segments are systematically are.

Segmentation, machine learning, and the importance of convolutional networks

As with any step in computer vision, machine learning can  used as part of image segmentation as an alternative to other more classic strategies like those mentioned above (thresholds, growth zones, deformable models, etc.)

In addition, deep learning has been touted s a much better and faster solution for image segmentation. In particular, convolution networks are a deep network architecture that is widely used in computer vision.

This strategy attempts to accommodate the large size of a fully connected network using a deep, multi-tier architecture. In fully connected networks, all neurons in one layer are connected to all neurons in the next layer. Instead, convolution networks use a local communication scheme. This makes it possible to reduce the number of connections between neurons and reduce the size of deep networks that already consume a lot of memory.

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Boundaries

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Computed tomography

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K-means algorithm

Color, intensity

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video tracking

Region-growing

partial differential equation

Inverse problems

Terzopoulos

Witkin

Fast marching method

Tortorelli approximation

Undirected graph

Segmentation-based object categorization

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