How can i convert a 3D image to 2D in matlab?

I am using a code that will work only on 2D arrays and I have to convert the current image which is in 3D to 2D.

Answer 1

[Image Analyst]

If the 3D image is a color image, you can take individual color channels like this:

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);

Or you could use a weighted average of the red, green, and blue channels like this:

grayImage = rgb2gray(rgbImage);

Or if you have a volumetric image (like a CT or MRI image or other image distributed in 3 spatial dimensions) you can use the mean (or max or min) like this

xyImage = mean(volumeImage, 3);
xzImage = mean(volumeImage, 2);
yzImage = mean(volumeImage, 1);

They will get you the average of the 3D volumetric image projected along one of the dimensions.

[greatest]

I have a MRI image.what do we do after we find the avg along the 3 dimensions?

[Image Analyst]

I don't know. Maybe declare victory and publish it?? Once you have the mean projection image along some axis, it seems like it would be all blurred and I don't know what use it would be. Maybe instead you want to take just one slice out of it, or maybe you want to use the maximum intensity value projection instead of the mean. Only you know what you want to do.

[VIJAY]

rgb2tiff not found in matlab 2013a... What to do now...???

[Image Analyst]

Sorry - I meant rgb2gray(). I corrected it. Try that.

[hidangmayum saxena]

How to divide a 3D anaglyph image into blocks, after taking the multilevel discrete wavelet transform of it?

[Image Analyst]

See the FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F

[Mihirasree]

thank you soo much sir your suggestions helping us all a lot . Thanks for helping us

Answer 2

[Dinesh kumar]

please answer me the coding for how to convert a 3d image into 2d image

[Image Analyst]

There are so many ways I can't list them all. Why don't you tell us

1. what you want to do,
2. and if your image is a 3D volumetric image, like a CT or MRI data set, or if it's a color image.

[Galiyabi P S]

Sir, Can you help me to convert 3D image to 2D, if the image is a MRI image of mha format.

[Walter Roberson]

https://www.mathworks.com/matlabcentral/answers/122486-how-can-i-load-and-view-medical-image-mha to read it. You can then extract slices of the result using array indexing.

[Galiyabi P S]

Thanks Walter Roberson for your answer. It helps me to read and display the mha image. Can you help me to convert these images to rgb format?