# Bitwise Not (Image Analyst)

Available with Spatial Analyst license.

Available with Image Analyst license.

## Summary

Performs a Bitwise Not (complement) operation on the binary value of an input raster.

Learn more about how Bitwise Math tools work

## Usage

• If an input is floating point, the values are converted to integer values through truncation before the bitwise operation is performed.

• In bitwise operations, the following are true:

• Binary values are stored in two's complement.
• The tools work on 32-bit integers.
• The leftmost bit position is reserved for the sign (positive or negative) of the value. If the integer is positive, the bit position is 0; if it's negative, the bit position is 1.

• The Bitwise Not operation treats the sign bit as it would any other bit. If the input for a cell location is negative, the output is negative; if the input is positive, the output is positive.

• If the input is a multiband raster, the output will be a multiband raster. The tool will perform the operation on each band in the input.

• If the input is multidimensional raster data, all slices from all variables will be processed. The output will be a multidimensional raster in CRF format.

## Parameters

 Label Explanation Data Type Input raster or constant value The input raster on which to perform the Bitwise Not (complement) operation.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To specify a number for both inputs, the cell size and extent must first be set in the environment. Raster Layer; Constant

### Return Value

 Label Explanation Data Type Output raster The output raster.The cell values are the result of a Bitwise Not operation on the input. Raster

`BitwiseNot(in_raster_or_constant)`
 Name Explanation Data Type in_raster_or_constant The input raster on which to perform the Bitwise Not (complement) operation.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To specify a number for both inputs, the cell size and extent must first be set in the environment. Raster Layer; Constant

### Return Value

 Name Explanation Data Type out_raster The output raster.The cell values are the result of a Bitwise Not operation on the input. Raster

### Code sample

BitwiseNot example 1 (Python window)

This example performs a Bitwise Not operation on an input Grid raster.

``````import arcpy
from arcpy import env
from arcpy.ia import *
env.workspace = "C:/iapyexamples/data"
outBitwiseNot = BitwiseNot("degs")
outBitwiseNot.save("C:/iapyexamples/output/outbitn")``````
BitwiseNot example 2 (stand-alone script)

This example performs a Bitwise Not operation on an input Grid raster.

``````# Name: BitwiseNot_Ex_02.py
# Description: Performs a Bitwise Complement operation on the
#              binary value of an input raster
# Requirements: Image Analyst Extension

# Import system modules
import arcpy
from arcpy import env
from arcpy.ia import *

# Set environment settings
env.workspace = "C:/iapyexamples/data"

# Set local variables
inRaster = "degs"

# Check out the ArcGIS Image Analyst extension license
arcpy.CheckOutExtension("ImageAnalyst")

# Execute BitwiseNot
outBitwiseNot = BitwiseNot(inRaster)

# Save the output
outBitwiseNot.save("C:/iapyexamples/output/outbitnot")``````

## Licensing information

• Basic: Requires Image Analyst or Spatial Analyst
• Standard: Requires Image Analyst or Spatial Analyst
• Advanced: Requires Image Analyst or Spatial Analyst