Technique on L'Arciere Celeste

Correcting bias drift through overscan calibration

Fri, 12 Aug 2022 15:01:50 +0000

Page translated by Claude — switch to Italian to read the original article.

Image calibration is a crucial step during the pre-processing of astronomical images; this short article takes a closer look at the calibration of cameras that suffer from the phenomenon known as bias drift, thanks to calibration using the overscan area.

Beloved Flat Fields

Fri, 12 Aug 2022 07:13:22 +0000

Page translated by Claude — switch to Italian to read the original article.

Calibrating astronomical images is one of the key steps to achieving a quality result, and one of the most important steps in this phase is the application of the flat field.

During my PixInsight courses all over Italy, one question, unrelated to the use of the software but of fundamental importance for image calibration, is: how many ADU should I make my FLATs?

Verifying the linearity of image sensors: going beyond linear regression.

Tue, 13 Oct 2020 21:14:11 +0000

Page translated by Claude — switch to Italian to read the original article.

One of the most debated and least understood issues among non-specialists is the so-called linearity of electronic image sensors.

CCD and CMOS imaging sensors should possess one fundamental characteristic if they are to be used for scientific purposes or even just for advanced astronomical imaging: the sensor’s response to light must be linear.

Dual-scope photography

Mon, 29 Jan 2018 14:48:14 +0000

Page translated by Claude — switch to Italian to read the original article.

In the February 2018 issue of the magazine Nuovo Orione, an article written by Luigi Fontana appeared about the acquisition and processing of images acquired with two different setups.

In the article, in a sidebar, I explained how to apply the composition technique with PixInsight.