To Adjust the Image Bias

  1. On the ribbon, click Raster Tools tab Edit panel Cleanup drop-down menu Bias.
  2. If you have not already selected an image, select the image you want to correct, and then press Enter.
    Note: You can select your image or images before you select the Bias command.
  3. Specify a point in the drawing to use as a base point, or press Enter to use the origin as the base point.
  4. Enter a calibration distance for the X direction by selecting two points to represent the distance, or enter the distance in AutoCAD units at the Command prompt. Then enter a desired distance for the X direction using one of the two methods, or press Enter to leave the X direction unchanged.
  5. Enter a calibration distance for the Y direction by selecting two points to represent the distance, or enter the distance in AutoCAD units at the Command prompt. Then enter a desired distance for the Y direction using one of the two methods, or press Enter to leave the Y direction unchanged.