General Issues :: Image Processing Toolbox 5.0.2 Release Notes (Image Processing Toolbox Release Notes)

Image Processing Toolbox Release Notes

General Issues

The following are known issues.

imoverview, imoverviewpanel, imscrollpanel and imtool Performance with Large Intensity Images

There is a performance problem with the Image Tool and its related navigation tools when used with large intensity images.

Possible workarounds:

For images of any class, the image can be treated as an RGB image via repmat.

I = imread('concordorthophoto.png'); 
imtool(repmat(I,[1 1 3]))

For images of class uint8 or uint16, the image can be treated as an indexed image.

I = imread('concordorthophoto.png'); 
n = double(intmax(class(I))); 
map = gray(n); 
imtool(I,map)

Both workarounds will make imcontrast unusable and pixel reporting will be for the wrong image type. The first workaround uses more memory than the second workaround.

Image Tool Cursor Interactions

If you run the Image Tool and activate one of the navigational tools (zoom in, zoom out, pan) prior to turning on the Adjust Contrast tool, the navigational tool will be turned off and will be replaced by the mouse behavior of imcontrast. Conversely, if you run imtool, start the Adjust Contrast tool, and then start a navigation tool, the mouse behavior of imcontrast is turned off.

Adjust Contrast Tool Does Not React to Changes in CLim, CData, or CDataMapping

If you turn on the Adjust Contrast tool using imcontrast or imtool, and then set the axes CLim property or the image CData or CDataMapping properties, the Adjust Contrast tool does respond to these changes in the image or axes. Once you click on the tool, it updates based on changes to the CLim values.

impixelregionpanel Might Interfere with ButtonDown events in Parent Figure

If you create an impixelregionpanel and another imscrollpanel in the same figure, the impixelregionpanel can interfere with ButtonDown events throughout the figure. This can, for example, prevent the user from clicking and dragging a position rectangle located in an imscrollpanel elsewhere in the figure.

Workaround: After creating all of the panels needed for your GUI, execute this code:

```
uistack(hPixelRegionPanel, 'bottom') 
```

where hPixelRegionPanel is the handle returned by impixelregionpanel.

imagemodel, imageinfo, and imattributes Return Incorrect Data Type

The imagemodel, imageinfo, and imattributes functions return class double for int16 or single images. These functions determine the data type by querying the image object's CData. For int16 and single images, the image object converts its CData to class double.

For example,

h = imshow(int16(ones(10)));
class(get(h,'CData'));

returns 'double'. Consequently, imageinfo and imattributes would return a class type of double and calling the image model object's getClassType method returns double.

cpselect Function Is Not Compilable

You cannot compile MATLAB applications that call the cpselect function.

Example in warp Function Reference Page Displays Incorrectly

On some Windows XP systems, the example on the warp function reference page does not display correctly. When warp is called, the axes is empty. To work around this problem, switch the renderer to the Zbuffer renderer, as follows.

```
set(gcf,'renderer','ZBuffer');
```

Known Issues Issues Specific to the Linux Platform