M83 NGC2403 NGC3675

Discussion in 'My Astrophotos' started by ROBERT T SCHAEFER JR, Apr 21, 2019.


    ROBERT T SCHAEFER JR Cyanogen Customer

    May 13, 2018
    CanonEOSII RebelT7i 'modified UV-IR @ Hutech' using a TPO 80A filter thru a TeleVue 2.5XPowerMate for
    3000mmF/L thru a 152mm A+M Refractor(OfficinaStellare) on an Astro-Physics 1200GTO Mount using
    MaximDL Pro V6.16 for 607secISO6400 RAWMonochrome Autosaves for four images . Then 'calibrated' and
    processed and Astrometric-Average stacked . Then the FITS was put into "ImagesPlus" for a lot of commands
    and then back into MaximDL Pro ... I did a 'Remove Pedestal' to move the 16BIT data in the 'screen stretch' window
    to the right about halfway ... and then the "Pixel Math for Image A Scale Factor 1000% and I used
    the Multiply radio button and for Image B Scale Factor 500% and Add Constant- 500 " and then adjusted the 'screen-stretch' ,
    for just the M83 image .x

    \ These images were RAWMonochrome Autosave images taken thru MaximDL Pro and then 'calibrated' and Astrometric
    Average stacked . Being that they were four images or less for each 'object' there wouldn't be a large content of digital data
    for the laptop to add up and then divide the amount of images into the added result to make the final image .. which is supposed
    to 'double' the SNR which is better than a single image before stacking . If I used the Sum stacking option then amount of data
    would be a large amount for the final stacked image …. which with just a few images used to stack .. the data content wouldn't be
    a super large amount ……. but …. with Calculators using high content data.. they can run out of mentality and not be able to
    compute the proper end result … possibly using 'icons' to describe what they can't comprehend ….. so,o,o,o … can a laptop
    compute very high digital data to complete a 'stacked' image correctly ?.?. If , you had twenty-four images to Sum stack …
    do you think the laptop can add up all the digital data to make a complete stacked image ? ; even doing the Average option still
    adds up the data and then divides the amount of images into it and makes the stacked image … but what it the laptop can't add up
    all the data to do that … and somehow it might look like something is missing ! .? . The only thing I can think to do about that is if
    you had for example twenty-four images and you want to Sum or Average stack them all is to do the stacking in smaller amount sections
    like four at a time and then you would have six separate stacked images and then you could stack those results into the final
    end result stacked image …. hoping the laptop has comprehended all the data for the final result image .. , and with the Sum option
    the 'screen-stretch' probably should be put to MaxVal and then the "Stretch" command for 16BIT should be applied to the section of
    four Sum stacked images to lower the resulted content from the … for example 5.000e 000 content of a Sum stacked
    image which will add up to millions or billions of digital data … if the laptop can actually comprehend the real result instead
    of an approximated 'icon' and numerical data result … which means the problem with stacking large content images into a single
    stacked image might be that the laptop can't really compute to extreme high numbers in
    about a minute's time during the 'stacking' operation..? … maybe it can and maybe it can't .. but with my luck it could be ' maybe it can't ' ./x

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