Duka,
Would it be possible to add a "Contrast" slider to the astro module Liveview display? This would give this Liveview display the equivalent of a real-time image stacking ability. A while ago you added an "Average image count" feature at my request. This helped to reduce high ISO noise but the display lacked contrast. If you add a contrast slider with 5 times the normal contrast range this, along with the existing brightness slider, would allow users to see very faint details that are common in astrophotography. This would allow astrophotographers to easily center their subject even in very faint situations.
The only caution I would add is that all of the Image averaging, contrast and brightness adjustments need to be performed using floating point values. Contrast would be applied after brightness adjustment is performed. Only once all of these calculations are done should you convert the image to an integer data type for display.
Regards,
Peter Wolsley
Astro Module Liveview suggestion
Re: Astro Module Liveview suggestion
Duka,
If you are able to make this change...I did some research to demonstrate why I will need lots of contrast. I have written a program that displays what are called FLATs. These are images taken with my telescope of an evenly illuminated nearby surface. The telescope is focused on infinity as it would when taking astrophotos. These FLATs appear as grey images with no details. Typically I will take 10 to 15 images this way and generate an averaged master FLAT. The following image is what a master FLAT looks like with no contrast adjustment...not much to look at? The magic comes when very high contrast is applied to the image. The 2nd image is the same master FLAT but here I have increased the contrast so that the equivalent of only one or two pixel levels can result in a swing of 100 to 120 pixel levels. This assumes that the full grey level range is from 0 to 255. The black circles are commonly called dust donuts. The ones you see here are microscopic specs of dust on the imaging chip of my Nikon D5300. Astrophotographers use FLATs to detect where dust specs are located and whether the optics need to be cleaned. We also use FLATs to calibrate our astrophotos to account for dust on the optics.
I hope this demonstrates how the averaging needs to have a contrast adjustment to pull out the faint details when using Liveview for centering faint galaxies etc.
Peter
If you are able to make this change...I did some research to demonstrate why I will need lots of contrast. I have written a program that displays what are called FLATs. These are images taken with my telescope of an evenly illuminated nearby surface. The telescope is focused on infinity as it would when taking astrophotos. These FLATs appear as grey images with no details. Typically I will take 10 to 15 images this way and generate an averaged master FLAT. The following image is what a master FLAT looks like with no contrast adjustment...not much to look at? The magic comes when very high contrast is applied to the image. The 2nd image is the same master FLAT but here I have increased the contrast so that the equivalent of only one or two pixel levels can result in a swing of 100 to 120 pixel levels. This assumes that the full grey level range is from 0 to 255. The black circles are commonly called dust donuts. The ones you see here are microscopic specs of dust on the imaging chip of my Nikon D5300. Astrophotographers use FLATs to detect where dust specs are located and whether the optics need to be cleaned. We also use FLATs to calibrate our astrophotos to account for dust on the optics.
I hope this demonstrates how the averaging needs to have a contrast adjustment to pull out the faint details when using Liveview for centering faint galaxies etc.
Peter
Re: Astro Module Liveview suggestion
Hi check this version https://s3.amazonaws.com/download.digic ... 0.76.2.exe
If you have any other sugestion just let me know ..
If you have any other sugestion just let me know ..
Re: Astro Module Liveview suggestion
Duka,
Thank-you for replying so fast. I will test it out and let you know.
Peter
Thank-you for replying so fast. I will test it out and let you know.
Peter