Sunflower from Palm Cove beach - Page 2

Quark (Trevor) · #21 21-11-2012, 02:55 PM

What a stunning result, exceptional really. Top Stuff Mark.

Regards
Trevor

gregbradley · #22 21-11-2012, 03:44 PM

Super image Mark, well done.

Greg.

ourkind (Carlos) · #23 21-11-2012, 03:48 PM

IOTW

Couldn't agree more!

David Fitz-Henr · #24 21-11-2012, 05:05 PM

A stunning image Mark - you've certainly made the most of the brief period of totality! Well done on the IOTW as well!!

Inmykombi (Geoff) · #25 21-11-2012, 06:07 PM

Very nice image indeed Mark.
So much detail it is incredible...

Congrats with Image of the week too.

h0ughy (David) · #26 21-11-2012, 06:20 PM

nice work and well done. I think that you could redo it again using the camera debayer setting ticked so that you have some colour - just a thought, after all you have some great data to work with

multiweb (Marc) · #27 21-11-2012, 07:42 PM

Great corona. Congrats on IOTW.

MarkJ · #28 21-11-2012, 10:10 PM

Thank you everyone for your generous compliments and glad you enjoyed the image. Thank you Mike for the IOTW, very chuffed.

I must give credit for the "Sunflower" name to Bratislav who named the image "Sunflower from the Palm Cove beach" soon after I showed it to him. I remember some impressive sun flowers in his back yard :-)

Daniel, you did very well to get the image you did though only a few seconds hole in clouds!

Houghy, thanks for the debayering suggestion, I'll do some homework and see what I can do.

Mark

Phil Hart · #29 21-11-2012, 10:46 PM

Love it Mark. Great detail.

I just want the world to stop turning so I can get off and try the same techniques on my images!

Phil

MarkJ · #30 22-11-2012, 08:50 AM

Thanks Phil,

Hope you get some time to apply the techniques to your images soon. Let me know if you get stuck with Fitswork as I might be able to help but really I just followed the tutorial at the link and manually aligned and stacked my images.

Here's the Fitswork link again for others that might have missed it.

http://www.gva-hamburg.de/sofi2006/f...itswork_uk.htm

Mark

Phil Hart · #31 27-11-2012, 10:27 PM

I've only had time for a quick play and a half with FitsWork. I am getting similar detail to your image, but the outer areas have a lot of noise.. the cumulative effect of adding all the individual images together and summing the noise.

Did you do anything to reduce noise in your stack.. subtracting bias/dark frames or something in Fitswork itself?

My appreciation of the result you got is even higher now!

Phil

naskies (Dave) · #32 28-11-2012, 02:11 AM

Very nice!

MarkJ · #33 29-11-2012, 09:51 AM

Glad you liked it Dave.

Phil,

The cumulative effect of adding all the individual images together should *reduce* the noise so the more images you can add the better off you are. I added 9 (maybe 10) images together (in Fitswork!) each of these varying in exposure by one stop. These were all raw images converted to 16bit tiff in Canon DPP software before processing with Fitswork. Shots were taken on a Canon 7D at ISO settings from 100 to 400 ASA so my original images are reasonable noise free.

I did not do any dark or bias subtraction to my original images although I I did consider bias subtraction as I could see some vertical banding in my original raw images although this was only when I pushed the background contrast aggressively, which I suppose is really what we are doing. Because I was shooting on an undriven tripod all my images were slightly differently framed so after alignment/stacking the banding averages out and "disappears". However, I'm still interested in going back to my images and subtracting bias.

When I look at my unprocessed image stack it looks quite noise free.

I generated a mask by applying the Larson-Sekanina filter to the image stack. I used 5.0/1.13 but played with reducing the 1.13 but image started to look noisy and over processed even though the detail was a little more contrasty. I wanted my image to look "smooth". The mask was quite noisy so I applied some wavelet filtering and then a slight median filter to it before multiplying it with the image stack.

After that it was mainly histogram adjustment and pasting the separately processed Moon which was also taken from the same image stack. My aim was to capture earthshine but I failed, perhaps there is a little there but I think it is really that thin wispy cloud that remained after that horrible dark stuff amazingly move aside :-)

I hope some of this helps.

Best regards,

Mark

ps I used the Eclipsedroid ap on my android phone to run a script and control my 7D via a USB cable. I worked really well and my phone was also capturing images controlled by the same script but I forgot to remove the cover I had over its lens at the start of totality :-( Anyway, 7D images were good.

Retrograde (Pete) · #34 29-11-2012, 12:40 PM

Wow - simply superb!

Jen · #35 02-12-2012, 03:02 PM

wow mark gorgeous pic well done

Dujon · #36 04-12-2012, 07:52 AM

I'm a bit late coming in. Sorry. Mark, I was 'gobsmacked' when I first saw your image. Whilst I haven't as yet looked at any other images of the eclipse on this site, that is the most beautiful depiction of the corona that I've yet seen. Certainly the earth-shine would have been a nice, but relatively unimportant, touch but, to me, the corona, prominences and loops are the prime reasons for viewing images such as yours. In the vernacular, Mark, you 'nailed it'. Congratulations and thanks for sharing the result with those of us who couldn't be there.