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how to extract roi automatically

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sathish kumar rb
sathish kumar rb 2017-9-24
评论： Image Analyst 2017-10-8
how to extract blobs (affected region) in lungs CT scan image without free hand selection using auto selection based on color r something . in that extracted output it needs to display only the blobs in white. background needs to be black
  2 个评论
Walter Roberson
Walter Roberson 2017-9-24
Is this cancer or TB to be detected, or something else?
CT scans are grayscale so you will not be able to detect anything by color.
sathish kumar rb
sathish kumar rb 2017-9-26
Cancer & Bronchities . I have attached my segmented lung

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回答（2 个）

Selva Karna
Selva Karna 2017-9-24
use imroi
Image Analyst
Image Analyst 2017-9-24
  5 个评论
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sathish kumar rb
sathish kumar rb 2017-10-8
编辑：Image Analyst 2017-10-8
Input: Segmented Lung
Output: ROIs with class labels
The pathology bearing regions are the region of interests. ROI is used to identify the abnormality from the segmented lungs.
Algorithm: ROIs Extraction
  1. Step 1: Extract the PBRs from the lung tissues as ROIs by finding the range of pixel intensity values to differentiate the PBRs and other lung pixels. If no PBRs present, then the slice is considered to be normal.
  2. Step 2: Obtain the class label information of each ROI from an expert.
Image Analyst
Image Analyst 2017-10-8
What are PBRs?
Go here for better algorithms: Medical Image Processing Algorithms
Try imfreehand(), like in the attached demo, to have your expert draw the ROI.

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