Assignment 2

Due 3/1 !

Images are 2D Arrays!

it's all numb3rs but you need to figure out the conventions...

Image Filtering

Input

Output

Kernel

Thresholding

Input

Input > 200

Count

Color

everything < 200 set to 0

everything < 247 set to 0

Histogram

How to segment the tumor?

Binary segmentation mask

Segmentation

means dividing up an image into different structures

foreground vs. background

Label Map

each identified structure has a unique ID

Datatype?

Comparison of Segmentation Techniques

Automatic Segmentation is a hard problem!

so much variability across subjects!

Semi-Automatic Segmentation

user places seeds

Manual Segmentation or Expert Segmentation is the "Groundtruth"

extremely time-consuming

2 Experts worked on this for 6 months

Atlas-based Segmentation

Registration / Alignment

Registration

mapping one subject to a standard space

mapping one image modality to a standard space

once in standard space, we can apply knowledge or compare

CS480 Lecture 13

By Daniel Haehn

CS480 Lecture 13

Slides for CS80 Biomedical Signal and Image Processing at UMass Boston. See https://cs480.org!

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