Blur and a visible stitch line

[diz lapz]

Hello,

I was trying to stitch a 360 HDRI in PTgui PRO trial version before I decide to purchase the software.

The results overall were very good, but unfortunatelly there is a very visble stitching line in the ground area which is then blurred for some reason.

The difference is very visible.

Would you be able to tell me if there is any chance to fix this issue.

Thank you for your help.

[John Houghton]

On Wednesday, March 13, 2019 at 4:09:36 PM UTC, diz lapz wrote:

I was trying to stitch a 360 HDRI in PTgui PRO trial version before I decide to purchase the software.

The results overall were very good, but unfortunatelly there is a very visble stitching line in the ground area which is then blurred for some reason.

The difference is very visible.

Have you followed the advice on shooting HDR panoramas given  in the tutorials on the PTGui web site? In particular, did you set the camera in manual mode and give exactly the same set of bracketed exposures at each shooting position? If so, can you save the project file (from the File menu) and post here. 

John

[diz lapz]

Hi John,

I have followed the advice given in the tutorials and set the camera in manual mode with the same set of brakceted exposures at each shooting position.

The file is attached so maybe you can see what would be the issue here and help with the fix.

Really apprecitate your help.

Thank you.

[John Houghton]

On Wednesday, March 13, 2019 at 4:59:49 PM UTC, diz lapz wrote:

I have followed the advice given in the tutorials and set the camera in manual mode with the same set of brakceted exposures at each shooting position.

The file is attached so maybe you can see what would be the issue here and help with the fix.

The project file does not show bracketed sets of images, as would be expected for an HDR panorama.  When an attempt is made to link the images for HDR processing, the following message appears:

John

[John Houghton]

Diz, Just to expand on my previous response:  Your project file indicates a shooting pattern consisting of 3 rows of 6 images.  The project contains only 18 images, yet the serial numbers in the image file names are incrementing by 7.  But this is not a single exposure set extracted from the full set of images, since the exposures are changing in the manner of a bracketed set.  It looks like you need to load the full set of 126 images into PTGui. These are the image parameters for the first row of images in the project:

John

[diz lapz]

Hi John,

I just wanted to use a very simple set up with one exposure, so therefore 18 images. Yes, I did take 7, but wanted to test it first without mixing it up. It should be even easier for the software to stitch the image.

I don't understand why would this create any issue with the final stitch.

Thank you.

[PTGui Support]

Hi,

The issue is that you seem to have used automatic exposure; all images
are taken at a different exposure time.

For non-HDR panoramas PTGui Pro can compensate for this, see
Expousre/HDR tab, 'Exposure compensation (for images taken in automatic
exposure mode)'. This should improve the result you were seeing.

For stitching HDR panoramas in PTGui, all images must be taken in manual
exposure mode (M mode on your camera). All bracketed sets should have
the same sequence of exposure times.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

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[John Houghton]

On Thursday, March 14, 2019 at 4:14:11 PM UTC, diz lapz wrote:

I just wanted to use a very simple set up with one exposure, so therefore 18 images. Yes, I did take 7, but wanted to test it first without mixing it up.

Diz, Given the bracketing, it should be possible to select 18 images that have the same exposure time (or very close to that) so that you can perform a normal stitch for the purpose of checking alignment and blending.

John