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Philadelphia skylines by miao

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About This Gigapan

Taken by
miao miao
Explore score
1.21 Gigapixels
Date added
Jun 03, 2010
Date taken
May 01, 2010

Re-stitched of a previously uploaded photo (after rotating all individual images 2 degree, left) to correct the curved shape of whole image

Gigapan Comments (4)

Toggle Minimize gigapan_comment
  1. miao

    miao (June 04, 2010, 05:17PM )

    Thanks cfastie. You are right that the black edges normally will cause the stitching problems. I did not crop the images after rotating since my hands/fingers stopped me. Also, one of my stitcher requires that all images be same size. In my case, the rotation was less/equal to 2 degree, the small edges was covered by large overlap. It was just an experiment to me. I will give the Lightroom a try. Thanks again.

  2. Chris Fastie

    Chris Fastie (June 04, 2010, 03:17PM )

    I would think the black edges would wreak havoc with the stitching. Maybe they all get eliminated due to the overlap? Or maybe the edges were not black but a clear matte (but I don't think that's possible in jpegs)? Adobe Lightroom will batch rotate and crop inside the original, so no black edges, and no hassle! Keep up the great gigapan work.

  3. miao

    miao (June 04, 2010, 02:58PM )

    Hi cfastie, 1. I really do not know why it was working. I do know is that my original individual images all skewed right, making me thinking that that was the reason that the original gigapan photo had a curved shape. It might be not. Anyway, I wanted to correct the positions of images by turning them left. Then it worked! 2. The rotating was done manually for each image. What a job! I am working on a Python program to see if it can help with the batch rotating. Not working yet. After rotating, the JPEGs are still rectangular with some black edges. I did not resize the images.

  4. Chris Fastie

    Chris Fastie (June 03, 2010, 04:00PM )

    miao, Great trick! 1. Why does this work? 2. How did you rotate the images? Don't jpegs have to be rectangular?

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Stitcher Notes


GigaPan Stitch version 1.0.0805 (Windows)
Panorama size: 1207 megapixels (92004 x 13128 pixels)
Input images: 315 (45 columns by 7 rows)
Field of view: 23.6 degrees wide by 3.4 degrees high (top=3.0, bottom=-0.4)
All default settings
Original image properties:
Camera make: Canon
Camera model: Canon PowerShot SX20 IS
Image size: 4000x3000, 4103x3138 (12.0 megapixels - 12.9 megapixels)
Capture time: 2010-05-01 22:36:02 - 2010-05-01 23:18:49
Aperture: f/5.7
Exposure time: 0.0015625
ISO: 80
Focal length (35mm equiv.): 540.6 mm - 558.5 mm
Digital zoom: off
White balance: Fixed
Exposure mode: Manual
Horizontal overlap: 39.5 to 62.0 percent
Vertical overlap: 37.7 to 54.9 percent
Computer stats: 6135.18 MB RAM, 8 CPUs
Total time 23:46 (4.5 seconds per picture)
Alignment: 13:52, Projection: 2:36, Blending: 7:17
(Preview finished in 18:55)

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