|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed
I blew out UGC 10704 costing some detail. My not so great seeing cost
even more. I can't do much about that. See original post for details. 14" LX200R @ f/10, L=4x10' RGB=2x10'x3, STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#2
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed
First time I posted these they showed up with odd horizontal lines not
in the originals I posted. Second time as well. I don't know what is going on. The JPGs are fine until posted. Weird. Rick On 8/27/2011 8:26 PM, Rick Johnson wrote: I blew out UGC 10704 costing some detail. My not so great seeing cost even more. I can't do much about that. See original post for details. 14" LX200R @ f/10, L=4x10' RGB=2x10'x3, STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#3
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed
I'm fighting a line problem. Each time I post an image it has
horizontal noise not in the image as posted. Oddly, the annotated image had no lines but the non annotated image did. Only difference was the labels and saving it at a lower compression which should cause problems not fix them. I did a bit of smoothing of the background, more than I'd like to use and am trying again. I also rebooted the computer to see if that helps. Always something new to deal with it seems. Rick On 8/27/2011 8:26 PM, Rick Johnson wrote: I blew out UGC 10704 costing some detail. My not so great seeing cost even more. I can't do much about that. See original post for details. 14" LX200R @ f/10, L=4x10' RGB=2x10'x3, STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#4
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed
Oddly the full image is still a mess of lines. Enlarged image is fine
now. It was saved at level 10 in PS while the line one was 9. Raising it to 10. I look at it in three different viewers plus PS and no lines in any of the failed images. Yet after posting I see lines. I'm about to give up. Rick On 8/28/2011 2:52 AM, Rick Johnson wrote: I'm fighting a line problem. Each time I post an image it has horizontal noise not in the image as posted. Oddly, the annotated image had no lines but the non annotated image did. Only difference was the labels and saving it at a lower compression which should cause problems not fix them. I did a bit of smoothing of the background, more than I'd like to use and am trying again. I also rebooted the computer to see if that helps. Always something new to deal with it seems. Rick On 8/27/2011 8:26 PM, Rick Johnson wrote: I blew out UGC 10704 costing some detail. My not so great seeing cost even more. I can't do much about that. See original post for details. 14" LX200R @ f/10, L=4x10' RGB=2x10'x3, STL-11000XM, Paramount ME Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#5
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed
On Sun, 28 Aug 2011 02:20:29 -0500, Rick Johnson
wrote: First time I posted these they showed up with odd horizontal lines not in the originals I posted. Second time as well. I don't know what is going on. The JPGs are fine until posted. Weird. Rick Something amiss with your news reader? All your posts and followups show no lines here at all. |
#6
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed
All your images look just fine to me.
Brian -- http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism Sed quis custodiet ipsos Custodes? |
#7
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed
On 8/28/2011 2:25 PM, Skywise wrote:
All your images look just fine to me. Brian I don't know what is going on. I posted these to several forums and all show this on several computers and monitors running different programs and OS. Yet I don't see it on the originals. They are very faint and unless you have your monitor set to go well into the dark region (needed for the way I process my images) they might not be visible. When I reduced the background noise (also takes out faint fine detail) the lines went away. I needed to reduce the image compression level as well which eliminated some compression artifacts the noise creates. Had to try several times with the full image before that happened. Since this happened with web postings as well as usenet and different programs were used I doubt that's it. Be sure you can see all levels of the attached gray scale strip, especially at the bottom end. If you can't separate the bottom two easily you won't see the lines. My backgrounds are usually set to about a level of 8 to 10. The lines were about 12 so difference small but, to me, very noticeable. Many set the black point of their monitors to about 15 which reduces the dynamic range too much but gives good dark blacks that looks nice but costs detail in shadows. When you have to shoehorn the ~4000 levels originally recorded down to only 256 for a monitor you want to use every level you can to preserve as much as possible. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#8
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed (1/2)
I misidentified one of the images.
The top right corner image is UGC10407L4X10RGB2X10X3-CROP150.jpg. And sorry if the multiplart causes any problems. My newsreader maxes out at 15000 lines per post. Brian -- http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism Sed quis custodiet ipsos Custodes? |
#9
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed (1/2)
On 8/30/2011 3:59 AM, Skywise wrote:
I misidentified one of the images. The top right corner image is UGC10407L4X10RGB2X10X3-CROP150.jpg. And sorry if the multiplart causes any problems. My newsreader maxes out at 15000 lines per post. Brian Interesting. I put it on to Picasa and read it back with the same lines. I put it a couple other places and again see lines. Tried IE and Firefox, both see the lines yet obviously you don't. This is the only image that does it. I can go back and read other images still on the news server and they are fine. I cured them by further smoothing the background. That would seem to indicate they were real. Enlarging the image also helped get rid of them as the enlarged image needed far less smoothing of the background. I even wondered if somehow my WiFi was involved so connected directly, same result. Had another imager on a different ISP look and he too saw the lines on the earlier versions. Yet others have emailed me they don't. So far it is a one time affair so unless it reappears, last posting was fine of Sh2-54, I will assume it a one time mystery. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#10
|
|||
|
|||
ASTRO: Abell 2197 and UGC 10704 reprocessed (1/2)
Rick Johnson wrote in news:4e5e9b4d$0$2929$a8266bb1
@newsreader.readnews.com: On 8/30/2011 3:59 AM, Skywise wrote: I misidentified one of the images. The top right corner image is UGC10407L4X10RGB2X10X3-CROP150.jpg. And sorry if the multiplart causes any problems. My newsreader maxes out at 15000 lines per post. Brian Interesting. I put it on to Picasa and read it back with the same lines. I put it a couple other places and again see lines. Can you provide links to those locations? Then I (and others?) can tell you if we see anything. Had another imager on a different ISP look and he too saw the lines on the earlier versions. What program are you using to create the final image? I'm wondering if perhaps there's some problem in the JPG encoding for that image that most viewer's software is able to get past, yet breaks in a few viewer's whose software can't handle the error gracefully. I'm no expert on image file formats, but for a personal programming project I've been dabbling with the TIFF specification. I recall references in the specs saying that the software needs to be able to handle certain errors gracefully. Perhaps the few of you who do see the lines are seeing an error in the problem file's encoding not being handled gracefully by whatever software you are using to view the image with. Unfortunately, I have zero knowledge of the jpg specification, although I may eventually as TIFF allows jpg compression, and is included in an appendix. THat is, if I ever get finished with writing that TIFF program. OH... another thought just hit me. When you are viewing these images and seeing the lines, are you viewing them at 100% scale? Not all programs dither down the image when zoomed out. I've seen programs that simply skip pixels/lines in order to shrink the viewed image size, which then causes interesting artifacts such as moire and other weirdness. Brian -- http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism Sed quis custodiet ipsos Custodes? |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
ASTRO: Abell 2197 and Super weird UGC 10704 | Rick Johnson[_2_] | Astro Pictures | 1 | September 4th 11 08:12 PM |
ASTRO: PK 59-18.1 AKA Abell 72 | Rick Johnson[_2_] | Astro Pictures | 5 | June 1st 10 09:58 PM |
ASTRO: Abell 2147 and Arp 324 | Rick Johnson[_2_] | Astro Pictures | 2 | March 14th 10 10:39 PM |
ASTRO: Abell 72 | Stefan Lilge | Astro Pictures | 1 | December 22nd 08 05:04 AM |
Astro: Abell 400 | Rick Johnson[_2_] | Astro Pictures | 2 | January 18th 07 10:04 PM |