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# Profile Parameters Dialog Help Window

LPROF is an open source application that creates ICC profile for cameras, scanners and monitors.

#### Resolution (CLUT points)

This set of radio buttons are used to select how many points will be included in the profiles Color Look Up Table (CLUT). Select smaller values to make small but less accurate profiles. Select larger values to create larger more accurate profiles.

#### Profile Verbosity

These radio button allow you to control how much additional information is stored in the profile. Selecting "Only required tags" will store only information that is absolutely needed in the profile. This makes for smaller profiles. "Store additional tags" stores additional information but does not store measurement information. "Verbose, store anything" will include everything that can be included in the profile including measurement information that is useful to the Profile Checker.

### Regression Parameters

This set of sliders are used to fine tune the Regression analysis algorithm used to fit the CLUT curves to the chart data points when creating camera or scanner profiles. Setting Avg. Deviation to lower values will cause a closer fit of the data points but this can result in the CLUT curves being less smooth. Setting the Smoothness slider to higher values will result in smoother curves but a poorer fit of the data points. In most cases the default settings of 1.0 for Smoothness and 0.007 for Avg. Deviation will yield profiles with low delta e numbers (close fit) and very smooth CLUT curves that are in both cases better than the old "local convergence extrapolation" setting that has now been discontinued. But there may be some cases where different settings will give better profiles.

#### Chromatic adaption & viewing condition

The default setting is Linear Bradford which is the standard setting recommended by the ICC. Use CIECAM97s to have more control over your profiles. This is particularly useful for monitor profiles since it allows you to compensate for viewing conditions.

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