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Limiting Intensity Values of an Image

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Amadeus
Amadeus 2013-1-13
Hi,
I have about 200 CT scans that I need to limit their intensity values between -2048 and 2048. I tried histeq and imadjust but they did not work. I get the best result when I use imshow(image, [-2048,2048]). But I need to save the result data of this imshow.
Original image-> http://img850.imageshack.us/img850/268/39979786.jpg
Imshow result -> http://img820.imageshack.us/img820/3909/76610719.jpg
What can I do?
Best

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回答（2 个）

Walter Roberson
Walter Roberson 2013-1-13
See the FEX contribution "freezeColors"
Image Analyst
Image Analyst 2013-1-13
Of course histeq() is not what you want. But I don't know why imadjust() didn't work - you must have called it incorrectly. Alternatively you could do
scaledImage = uint8(255 * (single(yourImage) + 2048)/4096);
imwrite(scaledImage, fullFileName);
That will scale your image between -2048 and +2048 and look like what imshow() does.

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