iKarus Stellar Mate Plus, Руководство пользователя

Страница: 42 / 227

The StellarMate Plus Manual
42 / 227
Process
The Process page has the following options:
·
Detection : Select star detection algorithm. Each algorithm have its strengths and
weaknesses. It is recommended to keep the default value unless it fails to properly
detect stars.
o
SEP: Source Extractor and Photometry, an efficient source detection method
based on Source Extractor (Bertin and Arnouts 1996; Bertin 2016). See SEP:
Source Extractor as a library in the Journal of Open Source Software.
o
Centroid : a source detection based on estimating star mass around signal
peaks.
o
Gradient : a single source detection based on the Sobel filter. Initial or full-field
analysis will use SEP instead of this method.
o
Threshold : a single source detection based on pixel values. Initial or full-field
analysis will use SEP instead of this method.
o
Bahtinov : This is useful for users who do not have a motorized focuser and
prefer to focus manually with the aid of a Bahtinov Mask. After capturing an
image in the focus module with the Bahtinov mask algorithm selected, Ekos
would analyze the images and stars within it. If Ekos recognizes the Bahtinov
star pattern, it will draw lines over the star pattern in circles on the center and on
an offset to indicate the focus.
·
Threshold : Threshold percentage value is used for star detection using
the Threshold detection algorithm. Increase to restrict the centroid to bright cores.
Decrease to enclose fuzzy stars.
·
Effect : Apply filter to image after capture to enhance it for preview purposes. It is highly
advisable to turn off any effects during the focusing process as it may interfere with HFR
calculations.
·
Kernel size : This is the gaussian blur kernel size. Used for blurring the image before
for instance the Bahtinov edge detection.
·
Sigma : This is the gaussian blur sigma value. Used for blurring the image before for
instance the Bahtinov edge detection.