how can i obtain a clear image from a set of 180 images

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Yazan Awwad 2013-11-16

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评论： Yazan Awwad 2013-11-23

I have a series of images produced by an ultrasound machine. The images are of an eraser. the position of the eraser is in a different as the ultrasound probe moves. I did image registration to register all of the images in respect to frame 1 (I have a total of 180 images). the intensities of the pixels of the eraser are not consistent between the frames. I took the average of the 180 images and the output image was blurred. I was wondering if u can suggest away to me so that I can get a clearer image out of the 180 images other than averaging them. Thank you in advance

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Walter Roberson 2013-11-18

(Sample images can be seen at http://www.mathworks.co.uk/matlabcentral/answers/105504-remove-out-of-place-pixel-values )

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Answer 1

Image Analyst 2013-11-16

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https://ww2.mathworks.cn/matlabcentral/answers/106427-how-can-i-obtain-a-clear-image-from-a-set-of-180-images#answer_115444

See section 20.12 here for algorithms: http://iris.usc.edu/Vision-Notes/bibliography/contentsmedical.html#Medical%20Applications,%20CAT,%20MRI,%20Ultrasound,%20Heart%20Models,%20Brain%20Models. Pick on, code it up, and come back here if you have questions.

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Image Analyst 2013-11-18

Does the scene move between frames? If not, I don't see why averaging frames would produce blur. If they do move, reduce noise on each frame, then call imregister() to align them all, then do averaging.

Yazan Awwad 2013-11-23

The eraser is what moves, but using phase correlation I aligned all the images (see examples at this link: http://www.mathworks.co.uk/matlabcentral/answers/105504-remove-out-of-place-pixel-values ). After i averaged them all, the output image was blurred. Is it may be because i am doing the registration incorrectly. Can u plz take a look at the sample images and probably let me know what is going wrong? Thank you

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