Adding line change the size of the image

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Aurélie B 2021-5-6

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https://ww2.mathworks.cn/matlabcentral/answers/823215-adding-line-change-the-size-of-the-image

评论： Aurélie B 2021-5-6

Hi!

I am currently working on adding lines above a image in App Designer, but when I add these lines, the image changes size and I don't want it to. Can someone help me please?

M is a 4D matrix(160,130,26,14)

profondeur, hauteur, largeur, temps are sliders, and angle 1,5 are knob

I=M(:,:,floor(profondeur),floor(temps));

affichagelignex(app);

J=imresize(I,[160 130]);

imshow(J,[],'Parent',app.UIAxes);

function affichagelignex(app)

profondeur = app.zaxegauchedroiteSlider.Value;

hauteur = app.yaxeavantarrireSlider.Value;

largeur = app.xaxepiedstteSlider.Value;

angle1 = app.AngleXYKnob.Value;

angle5 = app.AngleXZKnob.Value;

persistent h1

persistent h5

if (isempty(h1)&& isempty(h5))

h1=line(app.UIAxes,[0 130],[largeur largeur],'Color','green');

h5=line(app.UIAxes3,[0 26],[largeur largeur],'Color','green');

else

h1=line(app.UIAxes,[0 130],[largeur-hauteur*tand(angle1) largeur+(130-hauteur)*tand(angle1)],'Color','green');

h5=line(app.UIAxes3,[0 26],[largeur-profondeur*tand(angle5) largeur+(26-profondeur)*tand(angle5)],'Color','green');

end

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回答（1 个）

Chad Greene 2021-5-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/823215-adding-line-change-the-size-of-the-image#answer_693625

在 MATLAB Online 中打开

Can you get the axis limits before plotting the lines, and then set the axis back to those limits afterwards? Something like this:

ax = axis; % GET THE AXIS LIMITS
if (isempty(h1)&& isempty(h5))
    h1=line(app.UIAxes,[0 130],[largeur largeur],'Color','green');
    h5=line(app.UIAxes3,[0 26],[largeur largeur],'Color','green');
else
    h1=line(app.UIAxes,[0 130],[largeur-hauteur*tand(angle1) largeur+(130-hauteur)*tand(angle1)],'Color','green');
    h5=line(app.UIAxes3,[0 26],[largeur-profondeur*tand(angle5) largeur+(26-profondeur)*tand(angle5)],'Color','green');
end
axis(ax) % SET THE AXIS LIMITS

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Chad Greene 2021-5-6

Good heavens. I'm sorry, we've reached the end of my ideas for troubleshooting. Hopefully someone with app designing experience can chime in with better ideas. Good luck!

Aurélie B 2021-5-6