Documents for Excel, Java Edition Documentation
com.grapecity.documents.excel.drawing Package / IPictureFormat Interface / getBrightness Method
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    getBrightness Method
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    Gets the brightness of the specified picture or OLE object. The value for this property must be a number from 0.0 (dimmest) to 1.0 (brightest).
    Syntax
    double getBrightness()
    See Also