ULTRASOUND IMAGE PROCESSING: ROI, CONTRAST IN db

Hi,

I'm a biomedical engineering student at La Sapienza.

I'm supposed to process an ultrasound image(.tif):

1. Select different ROI
2. Evaluate the contrast i db for each ROI as in the figure.

Can someone help me?

Thanks

Answer 1

[Ameer Hamza]

You can use drawcircle() to select a circular region of interest and then create a mask from the ROI. Then you can apply the formula to calculates the contrast value. For example

im = rgb2gray(im2double(imread('peacock.jpg')));
imshow(im);

roi = drawcircle;
mask = createMask(roi);
% formula for contrast value

Answer 2

[Image Analyst]

See my attached masking demos.