i need negative image

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Miss SHOOSH
Miss SHOOSH 2015-10-28
编辑： DGM 2022-4-25
Hello .. I need help with transformation in grey level to transform cameraman.tiff image to negative version .. using Matlab code .. thanks
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Adam
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
Miss SHOOSH 2015-10-28
Ok Thanks .. anyone else can help? I have to apply negative transformation to the image cameraman.tif

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回答（3 个）

Image Analyst
Image Analyst 2015-10-28
Try this with a uint8 image:
positiveImage = imread('CameraMan.tif');
negativeImage = 255 - positiveImage;
VIBHOR AGARWAL
VIBHOR AGARWAL 2018-2-8
编辑：VIBHOR AGARWAL 2018-2-8
You can also use MATLAB's in built function- `imcomplement(Image)` for this purpose.
DGM
DGM 2022-4-25
编辑：DGM 2022-4-25
Ran in:
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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