Blurred Stitching

[Munjal Patel]

I take three bracketed shots in each direction. So for one panorama I have to take 12 shots at a single point. Instead of that I have to take 24 shots because a lot of times there is some blurriness in the stitched panorama. One 12 shot panorama comes perfectly and sometimes in other 12 shot panorama, lot of blurriness is added. At times it happens that both panorama comes out blurred. I have got my lens cleaned from authorised Canon Service Centre. If there was problem with my lens or camera then it would come out blurred all the time.

Camera: Canon 5D Mark III 

Lens: Canon 8-15mm Fisheye 

Tripod: Manfrotto MT190CXPRO33 Section Carbon Fibre Tripod Legs with Q90 Column

Panoramic Head: 360 Precision Atome

Is anyone else having the same problem?

[Erik Krause]

Am 15.11.2015 um 15:24 schrieb Munjal Patel:
> I take three bracketed shots in each direction. So for one panorama I have
> to take 12 shots at a single point. Instead of that I have to take 24 shots
> because a lot of times there is some blurriness in the stitched panorama.
> One 12 shot panorama comes perfectly and sometimes in other 12 shot
> panorama, lot of blurriness is added. At times it happens that both
> panorama comes out blurred. I have got my lens cleaned from authorised
> Canon Service Centre. If there was problem with my lens or camera then it
> would come out blurred all the time.

This isn't blur, it's reduced contrast. There are many possible reasons
for that. One is not shooting in full manual mode, other is lens flare,
third is wrong pre-processing. Please provide further details of your
workflow.

To investigate please make your project file and your source images
available. Quarter size jpegs would be best. If you shot raw, process
all your images exactly the same, without any enhancements and output as
quarter size jpegs.

Please do not add attachments to your posts; instead upload your files
at a file sharing site (for example http://ge.tt/ ) and include a link
in your message.

--
Erik Krause
http://www.erik-krause.de

[John Houghton]

Munjal, Judging by the appearance of the seam at the middle of the screenshot, I would guess it's an exposure issue of some sort.  Try generating the three blend planes and see if they look ok.  If they don't reveal any obvious fault, supply copies of the images as Erik suggests.

John

[Munjal Patel]

Hello,

    Thank you for quick response. I have shit in full manual mode. I am listing my workflow below and also sending a Dropbox link below which has folder containing all respective files.

Camera: Canon 5D Mark 3

Lens: Canon 8-15mm Fisheye

Panoramic Head: 360 Precision Atome

Shooting Mode: Aperture Priority (Av)

Aperture: F8

ISO: 400

Image Size: L JPG

AE Bracketing: +2 EV

Focus: M

Focussing Distance: 1.5 Feet / 0.5 meters

At each point I have taken 3 shots in each direction making it 12 shots per point. There were about 10 points in this project, so I had taken about 12 shots at each of 10 points twice.

After that, I had transferred it to a folder on my iMac. 

Opened PTGui -> Batch Builder -> Generate new projects

Detect Panorama Settings: Method -> Multiple panorama per folder with a fixed number of images

Then selected the source folder; Image file extension - Blank; Images per panorama - 12;

After this all the projects are created and batch stitcher manages the work. When I see the output in my folder, I see problem in some images.

If I have taken 12 shots at one point and just after a minute 12 shots at that same point, I am getting error in one image and one image is getting stitched properly.

It becomes a problem when both the stitched panorama comes out with error and I have to go to re shoot at this location. 

Please guide me where I am going wrong. I have attached all the files in the Dropbox link below.

Dropbox Link, https://www.dropbox.com/sh/m2shpekgs5y8ciu/AABzZZlM6jjeFJby8vg8a2g_a?dl=0

Sent from my iPad Air 2

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[John Houghton]

Munjal, Your workflow is very odd.  You shoot bracketed shots in Aperture Priority mode (not full manual mode) and simply pass all 12 images for stitching as an ordinary panorama - not HDR.  So no blend planes are created and it's just an ordinary stitch and blend.  What you should be doing is to use full manual mode with identical exposure & aperture brackets.  PTGui can them group the images into three exposure sets (blend planes) and merge them with either HDR or fusion processing.  See the help pages for more information.

John

[John Houghton]

Munjal, I just noticed that you have used auto white balance too.  Use a fixed white balance for all the shots.  By keeping all the camera settings the same (apart from the bracketing), you make sure that the images match and blend together easily.

John

[iulianaio...@gmail.com]

If your photos have too dark area, PTGUI when make the  panoramas blur that zone.
The solution is:
before stick in panorama, bright the dark zone (use radial filter ) in  ACR....
If the photos are bright is enought the blur zone...it is gone in PTGUI. .

[iulianaio...@gmail.com]

On Wednesday, February 10, 2016 at 9:25:54 PM UTC+2, iulianaio...@gmail.com wrote:

If your photos have too dark area, PTGUI when make the  panoramas blur that zone.
The solution is:

before stick in panorama, bright up the dark zone (use radial filter ) in  ACR....

[Erik Krause]

Am 10.02.2016 um 20:25 schrieb iulianaio...@gmail.com:
> If your photos have too dark area, PTGUI when make the panoramas blur
> that zone.

This plainly wrong. PTGui doesn't blur anything. The problems of the
original poster arise because of different exposure of the source images
overlap area. This has nothing to do with too dark areas.

Erik

[iulianaio...@gmail.com]

On Thursday, February 11, 2016 at 8:51:49 PM UTC+2, iulianaio...@gmail.com wrote:

On Thursday, February 11, 2016 at 8:49:06 PM UTC+2, iulianaio...@gmail.com wrote:

"PTGui doesn't blur anything"...really?

     Why in original photos the area are not blur, but in panoramas are blur?

     If you bright the dark area zone the blur zone are gone or are very reduce.
     Just try...

[Erik Krause]

Am 11.02.2016 um 19:49 schrieb iulianaio...@gmail.com:
> Sorry, if bright the dark area zone the blur zone are gone.
> Please try before.

Again, what you see is not blur (like from a defocused lens), it's
reduced contrast due to source images having different brightness.
Naturally this goes away if you change image brightness such that it
matches the adjacent image. While this improves the situation it's still
only a dirty workaround. First of all you should shoot your images such
that they are equally bright, like you have been advised by John.

Erik