dials.estimate_gain

Introduction

This program can be used to estimate the gain of the detector. For pixel array detectors the gain is usually set to 1.00. This means that the pixels behave according to Poisson statistics. However, for older CCD detectors the gain may have a different value. This value is important because it can affect, amongst other things, the ability of the spot finding algorithm which can result in noise being identified as diffraction spots.

Examples:

dials.estimate_gain datablock.json

Basic parameters

kernel_size = 10,10
max_images = 1
output {
  gain_map = None
}

Full parameter definitions

kernel_size = 10,10
  .type = ints(size=2, value_min=1)
max_images = 1
  .help = "For multi-file images (NeXus for example), report a gain for each"
          "image, up to max_images, and then report an average gain"
  .type = int(allow_none=True)
output {
  gain_map = None
    .help = "Name of output gain map file"
    .type = str
}