i need negative image
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Hello .. I need help with transformation in grey level to transform cameraman.tiff image to negative version .. using Matlab code .. thanks
4 个评论
Adam
2015-10-28
What have you done so far? Negating the image will depend on its data range, but when you have that it is a simple calculation.
Miss SHOOSH
2015-10-28
Adam
2015-10-28
Off the top of my head
doc imread
doc max
are all you really need beyond simple operations, although I'm not familiar with whether any specific scaling or shifting of the image data is done when negating it.
Miss SHOOSH
2015-10-28
回答（3 个）
Image Analyst
2015-10-28
Try this with a uint8 image:
positiveImage = imread('CameraMan.tif');
negativeImage = 255 - positiveImage;
VIBHOR AGARWAL
2018-2-8
编辑：VIBHOR AGARWAL
2018-2-8
3 个投票
You can also use MATLAB's in built function- `imcomplement(Image)` for this purpose.
It's best to avoid writing your code around unchecked assumptions of array class.
If you have Image Processing Toolbox, imcomplement() should work fine.
A = imread('peppers.png');
B = imcomplement(A);
imshow(B)
If you don't have IPT, MIMT iminv() (attached) does the same thing. It will work fine for images of any standard numeric/logical class. If you want to know how it works, just open it up and see.
A = imread('peppers.png');
B = iminv(A);
imshow(B)
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2015-10-28
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