setting range for pixel intensity

i am having a gray level image, i want to set range like if x(i,j)=183 to 215 it will have some value

c programming for this would be like

x[i,j]=pixel intensity
for(i=0;i<=n;i++)
{
for(j=0;j<=n;j++)
{
if(x[i,j]=183||x[ij]=215
{green color}
else
{red}
end
}}

how i would show this in matlab

Answer 1

[Guillaume]

You have to decide if your image is greyscale or colour. You obviously can't set a pixel to green in a greyscale image without first converting it to truecolour. In any case, your if/else would produce a binary image which by default is displayed in black and white.

Anyway, in matlab you wouldn't use a loop for this

%greyimage: your 2d matrix of the image, most likely of type uint8 if you're using intensities 183 and 215

bwimage = ismember(greyimage, [183, 215]);
%bwimage is a logical array the same size as the image with true (1) when the pixel has value 183 or 215 and false (0) otherwise

[Image Analyst]

Then

greyImage(bwimage) = someValue;  % Set to whatever you want.

Do it one color channel at a time if you have a color image.

[monika SINGH]

sir i did not understand what exactly you want to convey?