image resolution

2012 3 9
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Which function could be used to filter out some of the indices a image. I am not sure what would be most effective function I could use?

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Image Analyst
Image Analyst 2012-3-9
What does this mean? Do you mean delete particular whole rows or whole columns? Or you mean just get rid of single pixels? Realize that your image must remain rectangular.
Ram Ghosh
Ram Ghosh 2012-3-9
Hi
Not particular rows or column but some values (indexes) in a row and column. I have to replce all the values greater that 148 with 1 and less than 148 will be 0. I have this written so far. I dont know where am i doing wrong.
x=imread('bone_1_01200.pcx');
myData=size(x);
for i=1:length(myData(1));
for j=1:length(myData(2));
if x(i,j)>148;
x(i,j) = 1;
else
x(i,j) = 0;
end
end
imwrite(x,colormap,'file.pcx','pcx');
end
V=imread('file.pcx');
imshow(V)

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Walter Roberson
Walter Roberson 2012-3-9

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newx = cast(x > 148, class(x));

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