2.4 Profile

The profile function activates an interactive profile session for the displayed image in the main image window. The X/Y profile plot represents specific pixels and their corresponding gray level values. See the description for the X, Y, and Z radio buttons for more details on the profile plot. In addition to the x-axis and y-axis, a marker line is displayed in both the X and Y profiles. This line represents the current sample in an X profile and the current line in a Y profile. The profile also makes use of a viewport (just as the main image window) for any portion of the profile which falls outside the profile window. This viewport is attached to the image viewport such that if the user moves the scrollbar in the main image window, the scrollbar automatically moves in the profile window.

The X, Y, and Z radio buttons allow the user to select the dimension the profile is to be calculated in.

X:
The x-axis of the profile plot represents 1 to the number of displayed samples (a single line of image data). The y-axis represents the corresponding gray level value of each pixel (0 to 255).

Y:
The x-axis of the profile plot represents 1 to the number of displayed lines (a single column of image data). The y-axis represents the corresponding gray level value of each pixel (0 to 255).

Z:
The x-axis of the profile plot represents 1 to the number of image bands loaded. The y-axis again represents the corresponding gray level value of each pixel.
In both the X and Y dimensions, the user will see three color coded profile lines on the plot representing the red, green, and blue bands if the displayed image is color. If the displayed image is black and white, there will be only one profile line.
The automatic and manual radio buttons allow the user to select the update mode for the profile panel.
Automatic:
The profile information is updated each time the user moves the mouse within the main image window.

Manual:
The profile information is updated only when the user clicks the left mouse button in the main image window.
The continouous and discrete radio buttons allow the user to select the type of profile line to be drawn.
Continuous:
Draw the profile line as a continuous line between points.

Discrete:
Draw the profile line as discrete points.
Dismiss:
Close the profile panel.