Display Pixel Values in Image - Alternative to `showPixelValues()`

Hello,

I would like to display an image and its pixel values in a similar manner to showPixelValues().

What I need is to be able to display it on an Axes Object on my own.

Namely something like:

hFigure = figure();
hAxes = axes();
DisplayImagePixelsValues(hAxes, mInputImage);
% Now set the properties of the axis.

Are there any alternatives to `showPixelValues()`? Something with more user control.

Thank You.

---

Update

According to answers it seems I wasn't clear.

I don't want to show data of a current axis or something.

I want a function which the input is a matrix (Small one) and the output is a regular axis object with result of an image with text of the pixels values.

From there I'd like to be able to customize this axes to my wishes.

Answer 1

[Image Analyst]

How about impixelinfo()?

[Royi Avital]

See my edit to the question. I don't want to work on existing image window. Anyhow, any alternatives to the above besides impixelinfo()? Thank You.

[Image Analyst]

What about im2html(): http://www.mathworks.com/matlabcentral/fileexchange/32273-im2html-m

If not, then you'll just have to use text() to put up text labels over the image pixels.

[Royi Avital]

Hi, I looked into that. But I'd prefer having something which displays in a Figure Object (For exporting purposes). Has anyone implemented something like showPixelValues() in low level?

Answer 2

[Walter Roberson]

The existing File Exchange contribution you linked to, does an imshow() without any parent, so it will display inside the current axes.

However, I discovered recently that if you imshow() and the current axes is at the default position, that imshow sets up conditions so that the axes will typically be deleted on the next graphics operation. You can avoid that by setting a non-default Position for the axes.

In any case you can easily edit the File Exchange Contribution to add a 'Parent' property to the imshow() calls and other calls.

[Royi Avital]

I didn't get you exactly. Are there other alternatives instead of bypasses? Thank You.

[Walter Roberson]

No.

[Royi Avital]

Walter, is there a way to render HTML in a Figure Windows?

[Walter Roberson]

That would be a "bypass".

What you are asking is for there to be a function in MATLAB (or in the File Exchange at worst) that already does exactly what you want, without having to customize it even by minor changes. Such a function does not exist.

[Royi Avital]

I didn't understood your comment. What I need is the ability in the HTML function by Steve Eddins yet in regular Figure window (It's output is perfect yet I need it in a regular Figure window, not HTML Code). The function I noted isn't enough. Thank You.

[Walter Roberson]

The existing code does not produce HTML. The existing code produces a Figure. The figure has a single child axes. The axes contains an image, and a gridlines hggroup, and contains a whole bunch of text() objects.

The existing code does not return a handle to the figure that is created. However, the figure that is created will have a tag 'printImageToFigure'.

If you want to have the contents appear inside a figure you have already created, then call Steve's code and then

fig = findobj(0, 'tag', 'printImageToFigure');
figax = get(fig, 'Children');

and now you can copyobj() figax to the appropriate figure (or, better, appropriate uipanel.) After that you can delete(fig)

[Royi Avital]

On the other end it is limited to only few pixels while teh HTML code can handle much more data.

[Walter Roberson]

What HTML code? The routine you linked to does not create HTML. Which routine are you looking at that produces HTML?

[Royi Avital]

See ImageAnalyst - im2html(): http://www.mathworks.com/matlabcentral/fileexchange/32273-im2html-m

Answer 3

[Sindhu]

I need to display the pixel value in satellite image?

[Image Analyst]

Display how?

help impixelinfo

 IMPIXELINFO Pixel Information tool.
    IMPIXELINFO creates a pixel information tool in the current figure.  The
    pixel information tool displays information about the pixel in an image that
    the cursor is positioned over. The tool can display pixel information for
    all the images in a figure.
   
    The pixel information tool is a uipanel object, positioned in the lower-left
    corner of the figure, that contains the text string "Pixel Info" followed by
    the pixel information. The information displayed depends on the image type,
    as shown below. If the cursor is outside of the image area in the figure,
    the pixel information tool displays the default string.
   
    Image Type     Default String         Example
    ----------     --------------         -----------------
    Intensity      (X,Y) Intensity        (13,30) 82
    Indexed        (X,Y) <index> [R G B]  (2,6) <4> [0.29 0.05 0.32]
    Binary         (X,Y) BW               (12,1) 0
    Truecolor      (X,Y) [R G B]          (19,10) [15 255 10]
   
    If you want to display pixel information without the "Pixel Info" label, use
    IMPIXELINFOVAL.
   
    IMPIXELINFO(H) creates a pixel information tool in the figure specified by
    the handle H, where H is an image, axes, uipanel, or figure object. Axes,
    uipanel, or figure objects must contain at least one image object.
   
    IMPIXELINFO(HPARENT,HIMAGE) creates a pixel information tool in HPARENT that
    provides information about the pixels in HIMAGE.  HIMAGE is a handle to an
    image or an array of image handles.  HPARENT is a handle to the figure or
    uipanel object that contains the pixel information tool.
   
    HPANEL = IMPIXELINFO(...) returns a handle to the pixel information tool
    uipanel.
   
    Note
    ----
    To copy the pixel information string to the clipboard, right-click
    while the cursor is positioned over a pixel. In the context menu,
    choose Copy pixel info.
    
    For a floating point image with the 'CDataMapping' property set to
    'direct', the pixel information tool displays this default string: 
    (X,Y) value <index> [R G B]
   
    Examples
    --------
 
        h = imshow('hestain.png');
        hp = impixelinfo;
        set(hp,'Position',[5 1 300 20]);
   
        figure
        subplot(1,2,1), imshow('liftingbody.png');
        subplot(1,2,2), imshow('autumn.tif');
        impixelinfo
   
    See also IMPIXELINFOVAL, IMTOOL.

    Documentation for impixelinfo
       doc impixelinfo