CODEWITHSUNDEEP
matlabimage-processing
mskuratowski
mskuratowski

Reputation: 4124

Show image file

I'm writing a matlab method which get 2 parameters: uint8 image and grey level which all pixels with gray level larger than par_1 are set to white.

How can I show a image after my all actions ?

Here's my code:

function im = function_1(img, par_1)
checkUint8Image = isa(img, 'uint8');
if checkUint8Image
    im = uint8(img);
    [row, column] = size(im);
    im2 = ones(row, column); % white image
    for i=1:row
        for j=1:column
            if(im(i,j) <= par_1)
                im2(i,j) = im(i,j);
            end
        end
    end
    imshow(im2);
else
    disp('im paramter is not a uint8 type');
end

Maybe there is another way to solve this problem.

Input: enter image description here

Output: enter image description here

Upvotes: 0

Views: 97

Answers (2)

IsuruJ
IsuruJ

Reputation: 26

Try this code,

  function im = function_1(img, par_1)
  checkUint8Image = isa(img, 'uint8');
  if checkUint8Image
      im = uint8(img);
      [row, column, dim] = size(im);
      im2 = ones(row, column).*255; % white image
      for i=1:row
        for j=1:column
            if(im(i,j) <= par_1)
                im2(i,j) = im(i,j);
            end
        end
     end
     imshow(uint8(im2));
  else
    disp('im paramter is not a uint8 type');
  end

Here im2 is casted into uint8. And also note the line,

im2 = ones(row, column).*255;

Upvotes: 0

Cape Code
Cape Code

Reputation: 3574

I think you either use a value for par_1 where the whole image get sets to 1, that's why you get a white image, or you're having a scaling issue, that can be solved with the [] argument to imshow.

Shorter version of your function:

function im = function_1(img, par_1)
validateattributes(img, {'uint8'}, {'2d'});
    im=img;
    im(im > par_1)=1;
    imshow(im, [], 'InitialMagnification', 'fit');
end

Let's test it with your image and a value of 100 (the original image has values between 0 and 255, setting pixels to 1 will make them look black). Let's try it:

Testim=imread('https://i.sstatic.net/uJsPY.png');
function_1(Testim, 100);

Result:

Resulting image

Upvotes: 1

Related Questions