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      Menu View > Index Calculator > Sidebar > 3. Index Map > Index Map (Formula Editor) - PIX4Dmapper

       

      Access: On the Menu bar, click View > Index Calculator (available once step 1 . Initial Processing has been completed). The Index Calculator sidebar is displayed on the right of the main window. In section 3. Index Map, click Edit to edit the selected index (available for user defined indices).

      The Index Map pop-up is used to easily edit the formula associated to the user defined index. The name of the index that is edited is displayed in the window title.

      It contains 3 sections:

      And 3 action buttons:

      • OK: Confirms the changes.
      • Cancel: Does not save the changes.
      • Help: Opens the PIX4Dmapper help.

       

      Reflectance Map Band Selection

      Displays information for each band of each group of images of the generated Reflectance Map(s).The following information is displayed:

      • Band: Name of the band . If more than one group exists and the same band name exists in different groups, the bands are displayed as "Groupname_band."
      • nm: Wavelength of the band in nano-meters.
      • Min: Minimum pixel value per band.
      • Avg: Average pixel value per band.
      • Max: Maximum pixel value per band.
      • Stdev: Standard deviation of pixel values per band.
      • Var: Variance of pixel values per band.

      By clicking a band button, the band name will be automatically inserted in the Formula text box at the current cursor position.

       

      Operations

      Buttons that allow the user to automatically insert mathematical operations in the formula text box at the current cursor position.

      The available operations are:

      Symbol
      +
      -
      *
      /
      ^
      (
      )
      Action
      addition
      subtraction
      multiplication
      division
      exponentiation
      open parenthesis
      close parenthesis
      Symbol
      sqrt
      log
      sin
      cos
      tan
      asin
      acos
      atan
      Action
      square root
      natural logarithm
      sine
      cosine
      tangent
      arcsine
      arcosine
      arctangent

       

      Formula

      Text box to edit/write the formula associated to the index.

      Under the text box a message appears indicating the formula validation status:

      • Valid formula.
      • Undefined "band_name" band.
      • Incomplete formula.
      • Syntax error.
      Important: The formulas' expression is case sensitive: it distinguishes between upper and lower case.