Local Contrast Enhancement Settings

Use Local Contrast Enhancement to scale the intensity of each pixel in the image based on the Local Mean and Local Contrast about the pixel. (Local means that the mean and contrast are calculated from the pixel elements that form a box around the pixel of interest.)

Open Local contrast enhancement by choosing Filter | Enhance Contrast from the main softWoRx menu.

Use	To...
Input, Output, Select region, Reset, Details, Wavelengths	Specify input data and output parameters as shown in Image Input and Output.
Box	Specify the box size (in pixels) that determines the size of region used for the local mean and contrast calculations. Only odd values are valid. Note Local Mean is the mean of the pixels within the box. *Local Contrast* is calculated from the local mean subtracted from the intensity of the pixel of interest.
Auto range	Reposition the intensity scaling curves based on the minimum and maximum values of the local mean and contrast. When processing an entire bank, the intensity scaling curves are separately adjusted to match the local mean and contrast distributions of each section. This option is selected by default. When Auto Range is deselected, the intensity scaling curves are constant.
Min/Max	Specify the minimum and maximum values of the intensity scaling curve. The default minimum is 0. The default maximum is 1.
The LM weight function histogram	View the distribution of the local mean, that is, the number of pixel elements (the ordinate) versus the local mean (the abscissa). The red line on this histogram shows the pixel scaling intensity factor versus the local mean. This scaling factor is applied to all pixels in the image that have the corresponding mean.
The LC weight function histogram	View the distribution of the local contrast. That is, the number of pixel elements (the ordinate) versus the local contrast (the abscissa). The red line on this histogram shows the pixel scaling intensity factor versus the local contrast. This scaling factor is applied to all pixels in the image that have the corresponding local contrast.
Apply To	Choose how to apply the contrast enhancement. All Sections creates a regular output image file or window. Current Section stores the result in a temporary ("Scratch") window.
Options	Open a window that allows you to set the Scratch Size. This parameter is used to specify the maximum number of sections that are stored in the temporary output window when you are using the Current Section method.

Local Contrast Enhancement Settings

Input, Output, Select region, Reset, Details,

Wavelengths

Specify input data and output parameters as shown in Image Input and Output.

Box

Specify the box size (in pixels) that determines the size of region used for the local mean and contrast calculations. Only odd values are valid.

Note Local Mean is the mean of the pixels within the box. Local Contrast is calculated from the local mean subtracted from the intensity of the pixel of interest.

Auto range

Min/Max

Specify the minimum and maximum values of the intensity scaling curve. The default minimum is 0. The default maximum is 1.

The LM weight function histogram

The LC weight function histogram

Apply To

Choose how to apply the contrast enhancement.

All Sections creates a regular output image file or window. Current Section stores the result in a temporary ("Scratch") window.

Options

Open a window that allows you to set the Scratch Size. This parameter is used to specify the maximum number of sections that are stored in the temporary output window when you are using the Current Section method.

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