How to move slider-bar with a step-size of two?

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John Doe
John Doe 2020-5-17
评论： Rik 2020-5-18
Hey there everyone. I have a slider which I want to increase like 1:2:10 by dragging the bar with mouse. How can I accomplish that?
Thanks in advance!
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Rik
Rik 2020-5-18
I don't know if you have already come across this page, but especially since GUIDE is going to be removed from Matlab, here are some useful tips: https://www.mathworks.com/matlabcentral/answers/483657-how-to-create-a-gui

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Rik
Rik 2020-5-17
编辑：Rik 2020-5-17
Round the Value property to the nearest value in your array in the callback function.
allowed_vals=1:2:10;%better: store this in the guidata struct
val=3.2;%val=get(hObject,'Value');
[~,idx]=min(abs(allowed_vals-val));
val_rounded=allowed_vals(idx);
%set(hObject,'Value',val_rounded);
disp(val_rounded)
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John Doe
John Doe 2020-5-18
I see. Thanks for the explanation.
Actually, I am trying to pass this slider value to a filter.
x = imboxfilt(Dummyimage,sliderval)
When I increase the slider, the picture gets blurred. But then when I decrease the value, the blurness does not decrease. I want the blur amount to vary with the slider value.
Is it because the pixels are already averaged and cannot be reverted back? Is there a way to solve this issue? Thanks.
Rik
Rik 2020-5-18
You need to blur the original image, so you will have to store both the original and the processed version.

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