how can reconstruct one grayscale image with the other??

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sara 2014-9-18

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评论： Image Analyst 2014-9-22

I have 2 grayimage m1:

and m2:

you can see that m1 and m2 has a little differences.. Is there any way to reconstruct m1 wit m2?? I want to have m1 without any holes and any thing that are like holes... should I turn this images to binary image?

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Image Analyst 2014-9-18

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在 MATLAB Online 中打开

activecontour_demo.m

I'm sure we've talked this before. You can use active contour (demo attached again) to fill in bays on your image. Then use that to extract the new gray scale image

smoothBorder = activecontour(grayImage, mask, 400, 'edge');
newGrayImage = grayImage; % Initialize
newGrayImage(~smoothBorder) = 0; % Black outside smoothed border.

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Image Analyst 2014-9-20

sara, I found my code in your other question and tacked on my active contour demo and played around with it for about half an hour for you. I hope it's sufficient. There is no "right" answer. You can adjust the number of iterations to decide how much of the white stuff surrounding the lung should be considered as being in the location of where the lung should "normally" be vs being outside the lung and not be considered part of the lung. You can see it's including the white part in the lower left as lung but it's also getting some white stuff in the upper right as lung. So if you consider that white incursion in the lower left to be lung, then it will also get white stuff going into the lung in other parts, like in the central/between-lung region. It doesn't know where along the perimeter it should include or exclude white stuff - it just does it more or less equally all around. See image below, and code below the image in blue text.

If it's still not good enough for you then you'll have to start a more sophisticated algorithm, and perhaps that's what you really want to do anyway as part of your graduate school work. But of course that could be 2-4 years of work and I can't put in that much time to help you. I hope you understand. Normally I only devote less than 5 minutes to someone's task.

sara 2014-9-20

编辑：sara 2014-9-20

thanks Image Analyst yes I understand....I should try these things and merge these with "something that are in my mind and I think maybe is true" ... I will comeback soon.thank you for the time that you spend on my question. Always Your advice are very useful for me.

Image Analyst 2014-9-22

If it's the best answer you'll think you'll get from anyone, and at least got you started in the right direction, then can you mark it as accepted?

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sara 2014-9-22

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dear Image Analyst

If we want to use activecontour our mask should be larger than marker...so If we have for example 13 slices that we want to reconstruct one of them with the others so first we should know that wich one can be mask??am I right?

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Image Analyst 2014-9-22

I haven't used activecontour a lot. I don't know if the starter mask has to be larger than the final mask, or if it can be smaller, or go both inside and outside. Not sure - you'd have to try it. At least that's what I think you were asking, because morphological reconstruction with a marker image using imreconstruct() is a different thing.

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