# HistSumSquare

Sums the squares of pixel values within a specified range of greyscale values.

## HistSumSquare Inputs

Parameter | Description
Structure | This argument must reference a spreadsheet cell containing a Histogram or ColorHist data structure.
FirstBin | Specifies the first "bin" (0 to 255; default = 0) used to define the Histogram.
LastBin | Specifies the last "bin" (0 to 255; default = 255) used to define the Histogram.

## HistSumSquare Outputs

Returns | A value representing the sum of the pixel values squared, or #ERR if any of the input parameters are invalid.