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Topics - GrantBoxer

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General / Install Problem Win10 64bit new version
« on: 2019 December 21 18:34:47 »
I am trying to install the new PI version, but I keep getting a hang on the install screen saying "Preparing files for removal". I have uninstalled the previous version. Any suggestions?

General / Images fail to register
« on: 2017 December 14 17:13:54 »
I am trying to process images from a new Pentax K-1 camera (35Mp) and I am using batch preprocessing. I get to the image registration section and the program fails with the message saying cannot match stars. I have tried to increase the noise level settings but without success. Can anyone suggest what other things I can try?

General / INDI Device Controller
« on: 2017 August 03 16:19:05 »
I am looking at using the INDI module to drive my scope and camera, and wondered if there was a walk-through or tutorial on the process?

Bug Reports / Comet Align Tool does not work with xisf files
« on: 2014 December 23 02:46:53 »
Hi All,
is it correct you have to convert all the xisf files to fits files before running the comet align module. It says it can't find the time/datestamp.
Cheers Grant

Image Processing Challenges / Need a star mask for a comet merge
« on: 2014 December 23 02:38:36 »
Hi All,
I have been trying to blend a background star field with comet image (stacked using the comet align module) but although I have tried to follow the tutorials in PI-3, I still can't seem to be able to work it out. My problem is trying to determine to correct parameters for the star mask. I have attached the star field image. The images were produced from 80 x 1 minute subs.
Is there someone who can assist with creating a star mask for me so I can merge these images, and if so, which files do you require? I can post them on dropbox.
Regards Grant

General / Sony Raw Files
« on: 2014 October 26 21:31:03 »
Hi All,
I have been trying to use the ARW raw files from my Sony NEX-7 camera but when I process them in PI, I cannot get the correct colour balance. Any suggestions?
Cheers Grant

General / Tiff File Problem
« on: 2014 October 26 20:58:54 »
Hi All,
I have GeoTiff file comprising an UnSigned 16 bit integer 4 band multi-spectral file and I don't seem to be able to import it with PI seeing the 4 seperate bands.  Any suggestions?
Cheers Grant

Tips & Tricks / Superluminance for OSC images
« on: 2014 August 02 18:54:09 »
I have heard that creating a superluminance from OSC images may enhance the detail in OSC images. Can anyone comment on this and if this is the case, suggest a work flow to create a superluminace image?

Wish List / Principal Components Analysis
« on: 2014 March 22 02:22:47 »
Hi al,
I am using PI to process USGS Landsat satelite data and wondered how difficult it would be to create a principal Components Analysis script/pixelmath function that might be able to do this. I am not a mathematician so perhaps it is too difficult on this platform?
Regards Grant

General / Principal Components Analysis
« on: 2014 January 14 21:56:20 »
Hi Everybody,

this is not strictly an astro-image processing question, but does PixInsight have the capability to do Principal Components Analysis (PCA)? In addition to my astro-imaging, I use PixInsight to process Landsat 8 satellite imagery and would like to see if PI can also do the PCA. The PCA is used to de-correlate the data from a number of different spectral bands that the satellite collects and helps to identify anomalous regions, for example it is used in mineral exploration. I am not a mathematician and so I am a little perplexed when I look at the PCA equations! I am guessing that PixelMath would be the way to go, but I don't have the mathematical background to do this. For all you math-types out there - Is this difficult to do?

The processing of satellite imagery may be an additional application of PI and I would be happy to show you what I have been doing with the Landsat data, if anyone is interested.

Regards Grant

Image Processing Challenges / Processing Comet Lovejoy
« on: 2013 November 22 15:59:30 »
Hi All,
I have collected 30 x 30 second frames of Comet Lovejoy and calibrated and registered them using the Comet Align tool. I have also done a DBE on the result.
I have tried the traditional histogram stretch but failed to get a good image. Can anyone give me a hand as to how I can process this image.
My gear is a 6" RC Astrograph on HEQ5 pro mount with images collected with QHY-8 single shot colour camera.
Where can I put this file for people to have a look at? It is a 30Mb fits file.
Cheers Grant

Image Processing Challenges / Processing Comet Images
« on: 2013 October 30 04:59:36 »
Hi All,

can someone provide a walk-through to process comet images and then combine with the background stars. There have been a couple of posts recently but a little more help would be appreciated.
Hoping to get some good images of ISON. Any assistance appreciated!

Cheers Grant

General / Help with Veil Nebula
« on: 2013 October 12 06:32:18 »
I have collected rgb images of the Veil Nebula but the star field overwhelms the Nebula (visually). Can anyone recommend a technique to reduce the stars (sizes?) to allow the Nebula to appear more clearly.

General / Sky Coords on Images
« on: 2013 April 10 20:41:48 »
Does anyone know whether it is possible to have your images registered so that coordinates can be plotted on the image?

General / Comet Alignment Problem
« on: 2013 March 05 18:38:53 »
Hi All,
I have taken a series of 50 images of Comet Lemmon, which is up in our southern skies at the moment, and when I try to intergrate these after using the Comet Alignment module, I get a horizontal line of comets. It appears as thought the program is working only in one axis. Any thoughts or suggestions?
I have used the batch pre-processing script to do the image calibration and debayering but note that the images do have their date and time stamp intact.
Regards Grant

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