Not able to write the image by reading xcel files generated , getting error of data type as shown in picture attached. Anybody please help.

Answer 1

[Walter Roberson]

You cannot do that. The result of imagesc is an OOP object, and OOP objects cannot be written to excel files.

Perhaps for your purposes it would be good enough to change

z = imagesc(n);

to

z = rescale(n);

Answer 2

[Manu Gowda]

Answer 3

[Manu Gowda]

Error is as above picture

Answer 4

[Constantino Carlos Reyes-Aldasoro]

This is not very clear, it would be better to copy the code instead of figures and provide a sample file so that the case can be reproduced. However, there is a clear error in the following:

z=imagesc(n);

imwrite(z...)

When you do z=imagesc(n) you are using z as a handle to the image that will be generated with imagesc, for instance:

n=randn(65);
z=imagesc(n);

get(z)

             AlphaData: 1
      AlphaDataMapping: 'none'
          BeingDeleted: off
            BusyAction: 'queue'
         ButtonDownFcn: ''
                 CData: [65×65 double]
          CDataMapping: 'scaled'
              Children: [0×0 GraphicsPlaceholder]
              Clipping: on
           ContextMenu: [0×0 GraphicsPlaceholder]
             CreateFcn: ''
             DeleteFcn: ''
      HandleVisibility: 'on'
               HitTest: on
         Interpolation: 'nearest'
         Interruptible: on
                Parent: [1×1 Axes]
         PickableParts: 'visible'
              Selected: off
    SelectionHighlight: on
                   Tag: ''
                  Type: 'image'
              UserData: []
               Visible: on
                 XData: [1 65]
                 YData: [1 65]

Clearly that is not what you want to save as an excel file.

[Manu Gowda]

for i=10

im=imread(['C:\Users\Nikhil\Desktop\Manu Gowda\ground test\DIP\photoes\green\green' num2str(i) '.jpg']);

[x,y]=size(im)

m=x/2;

line=im(m,1:y);h

plot(line);

w1=137;

w2=142;

%w1 = input('width of fuel W1=');% entering the width of fuel by plot

%w2 = input('width of fuel W2=');% entering the width of fuel by plot

for i=1:6

im=imread(['C:\Users\Nikhil\Desktop\Manu Gowda\ground test\DIP\photoes\green\green' num2str(i) '.jpg']);

t=im(1:x,w1:w2);

b=t';

s=mean(b);

%u=arrayfun(@(x) sprintf('%10.0f',x),s,'un',0);

filename=['avg', num2str(i), '.xlsx'];

xlswrite(filename,s);

end

for k=1

basefilename = 'avg';

extension = num2str(k);

filename = strcat(basefilename, extension, '.xlsx');

n = xlsread(filename);

z=imagesc(n);

imwrite(z,['averaged' int2str(k), '.jpg']);

end

[Manu Gowda]

error i am getting

Error using imwrite (line 420)

Expected DATA to be one of these types:

numeric, logical

Instead its type was matlab.graphics.primitive.Image.

Error in updated (line 32)

imwrite(z,['averaged' int2str(k), '.jpg']);

[Constantino Carlos Reyes-Aldasoro]

Back to the same point z is a handle to the image, but if you want to output that as a file (say a png) you do not use imwrite like that, try this

n=randn(65);
z=imagesc(n);
imwrite(n,'testfile.png')

Answer 5

[Manu Gowda]

thank you for all of you