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Viewing
an image
nordicICE
has many functions enabling you to see the interesting details on an image,
or get a better overview. The
following steps assume that at least one image has been loaded. 1. Increasing the
image size
The size of small and
medium sized images can be increased. To increase a small sized image to a
medim sized image: 1.
On
the Main menu, select the Modify menu and the Increase image
size menu item Repeat the above step
to increase the size from medium to large. 2. Magnifying the
image
Images can be
magnified to display details. 1.
On
the Main menu, select the Modify menu and the Zoom menu
item. 2.
To
increase the magnification, click within the image and drag the mouse down. 3.
To
decrease the magnification, click within the image and drag the mouse up. 4.
To
turn magnification off, repeat step 1. You can alternatively
use the toolbar button 3. Panning the
image
Magnified images do not
fit within the image window. Hence you can pan the image to display the part
of the image you are interested in. 1.
On
the Main menu, select the Modify menu and the Zoom menu
item. (The panning functionality is only available when zooming has been
turned on.) 2.
Click
within the image and drag the mouse down to increase the magnification. 3.
On
the Main menu, select the Modify menu and the Pan menu
item. 4.
Click
within in the image and drag the mouse in the direction you want the image to
move. (It is possible to drag the mouse out of the image window for a grater
drag length.) 5.
To
turn off panning, repeat step 3. 6.
To
turn of the zooming, repeat step 1. You can alternatively
use the toolbar button 4. Smoothing the
image
In enlarged or
magnified images, the pixels become enlarged, and the pixel edges become
visible. To remove the visible pixel edges, you can smooth the image. 1.
On
the Main menu, select the Modify menu and the Increase image
size menu item twice to maximaize the image 2.
On
the Main menu, select the Modify menu and the smooth menu
item. Notice that the pixel
edges no longer are visible. 1.
To
turn smoothing off, repeat step 2. 2.
On
the Main menu, select the Modify menu and the Increase image
size menu item once to revert the image size to its original size, You can alternatively use the toolbar button 5. Changing the
image intensity and contrast.
An ordinary screen can only display 256 different shades of gray.
A normal image has a greater span than this between its maximal and minimal
pixel values. If you have an image where the interesting information is
stored in pixel values spanning a small portion of the total span of the
pixels in the image, you can change the image intensity and contrast to
maximize the use of the shades of gray on the screen for the interesting
pixel values. 6. Palettes
To simplify
recognizing different body parts and their abnormalities, standard mappings
between relative pixel values and colors have been defined. These
mappings are called palettes. nordicICE comes with some standard palettes.
The palette in use is displayed on the right-hand side of the image window.
To change the palette: 1.
On
the Main menu, select the Modify menu and the Palette
submenu, or use the top line menu directly. 2.
From
the submenu that becomes available, select Cardiac palette. (This is
for demonstration only, the Cardiac palette is not a good palette for the
head...) Notice how the Cardiac
palette makes differences between small pixel values visible in the
background. 1.
On
the Main menu, select the Modify menu and the Palette
submenu. 2.
From
the submenu that becomes available, select the Grayscale palette. Tips:
Alternatives:
Related topics:
Resize
the active window
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