how to fix these code lines for app designer

e 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)];

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

[Jan]

"they didnt work" is not a useful explanation of what the problem is. It is easier to solve an error than to guess, what it is.

[jana]

ok so basically what i meant by didnt work is it didnt show the mdifiedimage my app has an axes that shows the before image and that is its code

[filename,pathname] = uigetfile(); 
app.imageEditField.Value=strcat(pathname,filename);
app.Image=imread(app.imageEditField.Value);
app.Modified= app.Image;
imshow(app.Modified,'parent',app.UIAxes)

and it works and the other n=buttons including the codes i written show the after image and the ones i wrote dont show the after image what can i emmit of add that would make it work

[Image Analyst]

Not sure what that means. Does it now work, or not? Since you accepted my suggested fix, I assume it's all working now. If not, attach your .mlapp file with the paperclip icon.

Answer 1

[Image Analyst]

Instead of

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

try

f1=fspecial('average',[5,5]);
imshow(f1, [], 'parent',app.UIAxes2)
axis('on', 'image')

@jana you've asked 15 questions but have never awarded any of the people who helped you with "reputation points" by clicking the "Accept this answer" link. They'd appreciate it if you did that. 🙂

[jana]

so after i hit the lpf button and the periodic noise one they just show a black screen while i want the lpf to blur the image and that is not what happened ill attach the file below

[Image Analyst]

You had a number of major errors in those functions. I fixed them.

[jana]

thank u so much genuienly i cant thank you enough truly last thing though these codes for turning the grayiage to blue and green whats the problem with them a=(app.Image);

green=a;

green(:,:,3)=0

setappdata(0,'filename',green);

setappdata(0,'imrotation',green);

I=imshow(green,'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)];

the blue code

a=(app.Image);

blue=a;

blue(:,:,2)=0

setappdata(0,'filename',blue);

setappdata(0,'imrotation',blue);

I=imshow(blue,'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)];