Inserting NaN's into the Image with data of type single

Hi,

I have an image of size 256 X 256(total number of elements in the image are: 65536). How can insert NaNs into the image alternatively?. That is, every second entry of the image should contain a NaN. Such that no two adjacent pixels should have NaNs.

Kindly help me in this issue.

Thanks in advance..

Answer 1

[Image Analyst]

Try this:

grayImage = single(imread('cameraman.tif'));
[rows, columns, numColors] = size(grayImage)
mask = checkerboard(1, floor(rows/2), floor(columns/2)) == 0;
grayImage(mask) = nan;
imshow(grayImage, [])

[Sai Prakash Reddy Konda]

Perfect. Thank you so much Image Analyst.. :) :)

[Walter Roberson]

grayImage(1:2:end,1:2:end) = nan;
grayImage(2:2:end,2:2:end) = nan;

no function calls needed . This does assume that grayImage is floating point datatype.