.jpg as a background on gui

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Phillip Wolfe 2015-3-2

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评论： Image Analyst 2015-3-3

I have a code that creates a projectile motion. I'm looking to make the background a .jpg file instead of colors that I currently use. Help is much appreciated. This is our current background.

    backgroundX = [0 1 2 3 4 5 6 7 8 9 10 0];
    backgroundY = [0 4 2 7 5 8 3 4 2 5 0 0];
    backgroundX1 = [0 .75 1.5 2 2.8 3.5 4 4.666667 5.2 6 6.5 7.25 8,...
         8.66667 9.2 10 0];
    backgroundY1 = [0 3 3 2 6 6 5 7 7 3 3.5 3.5 2 4 4 0 0];
    backgroundX2 = [0 0 1 2 3 4 5 6 7 8 9 10 10 0];
    backgroundY2 = [10 0 4 2 7 5 8 3 4 2 5 0 10 10];
    fill(330*backgroundX,200*backgroundY,'PhilSkyline.jpg')
    fill(330*backgroundX1,200*backgroundY1,[0 .65 0])
    fill(330*backgroundX2,200*backgroundY2,[.3 .7 1])
    axis([0 3300 0 2000])

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Answer 1

Giorgos Papakonstantinou 2015-3-2

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编辑：Giorgos Papakonstantinou 2015-3-2

在 MATLAB Online 中打开

You can create a figure and remove the MenuBar. In this figure you can display your image, whose parent is an axis. You can set the axis position to occupy the full dimension of your figure.

i.e.

fig = figure('MenuBar', 'none');
IM = imread('peppers.png');
h = image(IM);
set(get(h, 'parent'),'XTick', [], 'YTick', [], 'position' , [0 0 1 1])

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Phillip Wolfe 2015-3-3

编辑：Phillip Wolfe 2015-3-3

在 MATLAB Online 中打开

This is the entire for loop. The last suggestion didn't work

for t = (0:0.1:t_Total) 
    xx = v0*cosd(theta)*t; % displacement in x direction as the object 
    % progresses through the time interval.  Note: there is no 
    % acceleration in the x direction
    yy = y0 + ((v0*sind(theta)*t) + (0.5*g*(t*t))); % dispalcement in the 
    % y direction as the object progresses through the time interval
    pause(0.01) % causes slight pause before continuing 
    phi = spin*t;
    rotationFactorX = [cos(phi), -sin(phi)];
    rotationFactorY = [sin(phi), cos(phi)];
    % Translating the roation point to the origin
    originx = shapeX - .5;
    originy = shapeY - .5;
    % Rotating the Object
    rotatex = (rotationFactorX*[originx;originy]);
    rotatey = (rotationFactorY*[originx;originy]);
    % Translating the object back
    moveBackx = rotatex+.5;
    moveBacky = rotatey+.5;
    % Displacement of Object
    x1 = moveBackx;
    y1 = moveBacky;
    % Background
    hold on
    fig = figure('MenuBar','none');
    IM = imread('PhilSkyline.jpg');
    h = image(IM);
    set(get(h, 'parent'),'XTick', [], 'YTick', [], 'position' , [0 0 4 4]);
    axis([0 2000 0 2000])
    axis equal
    shape = fill((s*x1)+xx,(s*y1)+yy,color);
    hold off
end

Giorgos Papakonstantinou 2015-3-3

The limits of your axis are the same size of your image. Therefore when you invoke the|axis| command you change the limits of the axis: [xmin xmax ymin ymax]. You set them [0 2000 0 2000].

Is this size of your image? (2000 x 2000).

Moreover, when you issue axis equal you set the aspect ratio so that the data units are the same in every direction. As a result your image does not fill the whole figure when you resize the figure.

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