image resolution

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?

[Image Analyst]

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]

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)

Answer 1

[Walter Roberson]

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

[Ram Ghosh]

Hi thanks for your answer!!!