Added Processing section.

.. File Processing.rst

.. include:: global.rst

.. _processing:

Processing

==========

The complete analysis of an image is fully automated (:numref:`fig_sexlayout`). Two passes are made through the data.

During the first pass, a `model of the sky background <background_mode>`_ is built, and several global statistics are computed.

During the second pass, image pixels are background-subtracted, filtered and segmented on-the-fly.

Detections are then deblended, pruned (“CLEANed”), and enter the measurement phase.

Finally, the measured quantities are written to the output catalog, after cross-matching with an optional input list.

.. _fig_sexlayout:

.. figure:: figures/sexlayout.*

   :align: center

   Layout of the main |SExtractor| procedures. *Dashed arrows* represent

   optional inputs. 

The following sections describe each of these operations in more detail.

.. toctree::

   Background

   Weighting

   Flagging

   License

   Installing

   Using

   Background

   Weighting

   Flagging

   Processing

   Measurements

   references