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Galleries
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EcoTech, Wind Turbine Tour!
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Re: EcoTech, Wind Turbine Tour!
Posted: 18 May 2012 at 20:56 GMT
updated: 18 May 2012 at 21:00 GMT
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Why are you trying to merge these three images? They are not shot at three different exposures as needed for the purpose of merging in HDR software. Even if they were, you have the major movement of the turbine blades and the clouds to contend with. Shoot one set at 1/125th, another at 1/250th, and another at 1/500th for example, at f/8. (Your three images should look under-exposed/normal/over-exposed if they are to be of any use in HDR processing. All sorts of unintended effects will occur if you don't shoot the images properly.
For this panorama, I suggest you abandon any HDR processing and concentrate on getting a good stitch from just one set of images.
John
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Forum:
Galleries
Thread:
EcoTech, Wind Turbine Tour!
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Re: EcoTech, Wind Turbine Tour!
Posted: 18 May 2012 at 15:16 GMT
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Marco, On my Windows V7 / IE9 system, there is no panorama displayed on the initial page at the link - just a blank space below the button to select the iphone version. Firefox displays the panorama ok.
I agree that the colours are somewhat garish (as in your previous panorama). This sample shows how a more natural look might be obtained with suitable adjustments to the saturation and colour balance:
Those who haven't got a calibrated monitor may not be able to see the extraordinary mess at the zenith, which thankfully tends to get lost in the darkness.
It would be of interest if you could say what equipment you are using and how you are processing the images. The strange colours may be the result of HDR processing, but I believe your camera (Nikon D3100?) doesn't have an AEB option, so that makes HDR work difficult.
John
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Thread:
Back on track...
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Re: Back on track...
Posted: 16 May 2012 at 19:30 GMT
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DorinDXN said: DemonDuck said: ..
but someday PTGui will output cube faces and then that will be moot.
PTgui does that from years ago, you only need a project file with the same equirectangular as source image 6 times, i.e. the same source image 6 times in the same project but rotated with yaw, pitch and roll according with those 6 faces.
PTGui can more easily produce cube faces via Tools->Convert to QTVR/cubic
John
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Forum:
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Thread:
5D MkII - Image corruptions
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Re: 5D MkII - Image corruptions
Posted: 14 May 2012 at 20:20 GMT
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A surprising discovery: on my laptop is a good jpeg version of the corrupt image 544 - converted from the first set of RAW images last Monday. I used jpeg images instead of the usual tiff to make a quick stitch just to see how well the panorama worked. I dumped the RAW files onto the laptop and then formatted the CF card ready for use the next day. But the RAW file on the laptop is corrupt. (All the files were copied from the laptop to my PC via a 32GB usb memory stick when I returned home last Friday). Converting the RAW file still on the laptop (with ACR) now generates a corrupt jpeg file. It's just possible that I generated the uncorrupted jpeg file from the original RAW file located on the CF card in the usb card reader. I vaguely remember noticing at some time that by accident, Bridge was browsing the CF card instead of the hard disc as things were going none too fast at the time.
So, it seems the camera at least can probably be exonerated, but the laptop might be in some way playing a part in the corruptions. It might account for the difficulty I was having in reproducing the fault, uploading images to my PC rather than the laptop.
John
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5D MkII - Image corruptions
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Re: 5D MkII - Image corruptions
Posted: 14 May 2012 at 17:49 GMT
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Dorin, That's really useful. I don't know how I have missed all the firmware updates since buying the camera. There was one issued only a week or so after my purchase! I usually check from time-to-time and am alerted to new updates by News items at DPNow.com. I'll update forthwith.
I received a quick response to my enquiry sent to Canon Support. They failed to mention checking for the latest firmware installed, and could only suggest trying different cards to see if the fault happened on only the one card. Posting the query here has been significantly more fruitful.
John
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5D MkII - Image corruptions
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Re: 5D MkII - Image corruptions
Posted: 14 May 2012 at 11:02 GMT
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Thanks to you both. I tried RawExtractor and that's worked ok and given a full size image. It's certainly a great deal better than nothing!
John
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Forum:
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5D MkII - Image corruptions
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Re: 5D MkII - Image corruptions
Posted: 14 May 2012 at 9:56 GMT
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DorinDXN said: Not sure if is the case for 5D MkII, but if you send me a RAW and it is the case then I will send you back a script to extract the jpeg in 1s.
Dorin, I believe there is an embedded jpeg file that's used for the in-camera image review feature. I have checked one of the corrupted images in the camera and the displayed image is fine. I would certainly be interested in having the script to extract this image. Hopefully the image is a reasonable size and quality. I have uploaded the raw image as:
www.johnhpanos.com/IMG_0544.CR2 (25MB)
John
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5D MkII - Image corruptions
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Re: 5D MkII - Image corruptions
Posted: 14 May 2012 at 7:36 GMT
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Dorin, The 5D has options to output RAW and/or JPEG images, so having both would certainly be a sensible strategy. I'll reserve this particular card for use on non critical projects and tests that are easily repeated.
John
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5D MkII - Image corruptions
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Re: 5D MkII - Image corruptions
Posted: 14 May 2012 at 6:36 GMT
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Thanks for the comments. The CF card is fairly new and only used a few times. The first corruption occurred last Monday and the card was reformatted after that discovery when I transferred the files to my laptop in the evening (via a card reader). The further two corruptions then occurred on the following day. I've emailed Canon Support for an informed opinion, as they might well have seen a similar fault before. I'll report back when they reply in 4-5 days. Meanwhile, I managed to stitch a decent panorama from one single exposure set of images:
www.johnhpanos.com/ilfra-chapel.htm
John
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5D MkII - Image corruptions
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5D MkII - Image corruptions
Posted: 13 May 2012 at 18:50 GMT
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A few days ago I shot around 120 images (RAW, in bracketed sets) and was later dismayed to find amongst them three that were badly corrupted. Two panoramas were affected. The corruptions look like this:
tinyurl.com/c2cs6qg
The cause might be a camera fault, a CF memory card fault, or maybe electrical interference. Anybody seen anything similar before and can throw some light on the matter? I today shot about 200 test shots with the same camera and card without reproducing the fault. I also note that Photoshop is able to display an uncorrupted thumbnail of each image when in the file open dialog screen.
John
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Thread:
Outdoor Lighting Inconsistencies?
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Re: Outdoor Lighting Inconsistencies?
Posted: 30 Apr 2012 at 7:58 GMT
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It's not a simply matter of making images brighter/darker to make them match. PTGui can do this for you anyway. The nasty problem that's hard to deal with is the lack of shadows cast by a clearly visible sun in parts of the panorama where you ought to see shadows. It's best to take avoiding action by waiting for a sufficiently large hole in the clouds to slide in front of the sun before starting to take the shots. Then work very quickly before the sun gets cut off again. If interrupted by the clouds coming over too soon, you may stop and continue when the next hole comes along. The problem then is that the clouds probably won't stitch properly because of the movement between shots. The solution to that is to take an additional set of shots very quickly just of the sky. Stitch those separately and merge into the main panorama.
John
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Thread:
NN R1/R10 models: anyone use them?
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Re: NN R1/R10 models: anyone use them?
Posted: 25 Apr 2012 at 17:28 GMT
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Skridlov said: What is the procedure (short of undertaking a math revision course) for using it with +5deg? Do I use the sighting technique with the sight in the same position as I would for 0deg? Ie on the lens axis as it was presented before tilting the head?
Roy, You can just keep the sight line horizontal and ignore the 5° upwards tilt of the lens.
John
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Thread:
Canon 60D + Vivitar 7mm lens problems
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Re: Canon 60D + Vivitar 7mm lens problems
Posted: 25 Apr 2012 at 9:19 GMT
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The NN4 + RD8 would be a good combination. That will cope with all the fisheye lenses and rectilinear lenses up to 30mm focal length (using the available detents). I haven't used an NN4, but I have an NN5 + RD8 which I have been very happy with, and the NN4 is similar to the NN5. The main difference lies in the upper rotator: unlike the NN5, the NN4 doesn't permit the 15° detents to be disengaged to enable smaller pitch increments, which is useful if wanting to to shoot multi-row panoramas with longer focal length lenses.
John
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Forum:
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Thread:
Top stitch ok, bottom ok, but not together?
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Re: Top stitch ok, bottom ok, but not together?
Posted: 24 Apr 2012 at 12:36 GMT
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Pat Traynor said: John, what version of Ptgui are you using? I use v8 and have pretty good success stitching. Recently I downloaded the v9 trial and got terrible results using the same images that v8 used without any trouble.
Pat I'm using PTGui Pro 9.1.3. V8 and V9 may well give different results for you but which one is better probably depends a lot on how you shoot your images and how you use PTGui to stitch them. I have not myself found V9 to be inferior to V8, but I probably do things differently to you. However, there's currently a message on the PTGui forum reporting a similar experience to yours, so maybe your workflows are similar. No evidence has yet been forthcoming, but Joost responded with this comment:
"One thing that might be happening is that due to the improved control point detection algorithm PTGui is now 'able' to detect control points on your panoramic head or tripod. Adjacent images will be linked by control points on the panoramic head instead of by control points in the scene. If this happens you should mask out your tripod before generating control points. You can do this once and save to a template. Then apply the template before pressing Align Images".
Without a copy of your images and details of how you process them with PTGui, it's hard to diagnose what exactly might be causing your particular V9 failures.
John
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Canon 60D + Vivitar 7mm lens problems
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Re: Canon 60D + Vivitar 7mm lens problems
Posted: 24 Apr 2012 at 9:15 GMT
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mreyes said: Maybe with your experience, you could give me more guidance in the making of my first full 360 x 180 panorama, and tell me if the problem are the photos or the settings I used in the stitching program.
The images are much as one would expect from a handheld camera albeit shot reasonably carefully. There are inevitably minor stitching errors, which can be to some extent hidden by suitable masks (in PTGui Pro). Those that remain can be corrected in Photoshop by extracting rectilinear views. I've put a project file and amended equirectangular panorama here:
www.johnhpanos.com/D60_7mm_jh.zip
The best option is to use a correctly set up spherical panorama head on a tripod. Next best would be a monopod. Last would be to hang a plumb line from an elastic band positioned on the lens barrel in line with the entrance pupil location. Hold the camera so that the weight at the end of the plumb line(a key,say) hangs just above a fixed marker on the ground. This keeps the camera at a constant height and maintains the camera in the no parallax position as you take the shots around. It can work well, but not in windy conditions for obvious reasons.
John
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