hi guys how should i fix i=this code error its supposed to be changing an image to gray scale mind u this is in app designer

Answer 1

[Kevin Holly]

Have you tried using im2gray instead of rgb2gray?

[jana]

i did and it worked with no error but it doesnt show in the wanted axis i dont know why here y file can u plz check it out for me

a=getappdata(0,'a');

a_gray=im2gray(a);

setappdata(0,'filename',a_gray);

I=imshow( a_gray,'parent',app.UIAxes2,...

'XData',[1 app.UIAxes2.Position(3)],...

'YData',[1 app.UIAxes2.Position(4)]);

app.UIAxes2.XLim=[0 I.XData(2)];

app.UIAxes2.YLim=[0 I.YData(2)];

[jana]

heres is what shoes in the interface (modified image)after i hit the grayshade button it changes to blank

[Kevin Holly]

You don't need these lines.

a=getappdata(0,'a');
setappdata(0,'filename',a_gray);

You can call the defined property variable Image

a_gray=im2gray(app.Image);
I=imshow( a_gray,'parent',app.UIAxes2,...
                'XData',[1 app.UIAxes2.Position(3)],...
                 'YData',[1 app.UIAxes2.Position(4)]);
            app.UIAxes2.XLim=[0 I.XData(2)];
             app.UIAxes2.YLim=[0 I.YData(2)];

[jana]

so i did as you said and it worked thank u very much but the last thing is the gaussian and periodic noise this is my code for them and they didnt work how can i fix them plz?

this is the gaussina noise code

a=(app.Image);

noise=imnoise(a,'gaussian');

I=imshow(noise,'parent',app.UIAxes2,...

'XData',[1 app.UIAxes2.Position(3)],...

'YData',[1 app.UIAxes2.Position(4)]);

app.UIAxes2.XLim=[0 I.XData(2)];

app.UIAxes2.YLim=[0 I.YData(2)];

and this the periodic noise code

a=(app.Image);

s=size(a);

[x,y]=meshgrid(1:s(1),1:s(2));

p=sin(x/3+y/5)+1;

noise=(im2double(a)+p/2)/2;

I=imshow(noise,'parent',app.UIAxes2,...

'XData',[1 app.UIAxes2.Position(3)],...

'YData',[1 app.UIAxes2.Position(4)]);

app.UIAxes2.XLim=[0 I.XData(2)];

app.UIAxes2.YLim=[0 I.YData(2)];

[jana]

sorry i also have this low pass filter also doesnt work how can i fix it

a=(app.Image);

f1=fspecial('average',[5,5]);

I=imshow(f1,'parent',app.UIAxes2,...

'XData',[1 app.UIAxes2.Position(3)],...

'YData',[1 app.UIAxes2.Position(4)]);

app.UIAxes2.XLim=[0 I.XData(2)];

app.UIAxes2.YLim=[0 I.YData(2)];