Reprojected Three Green Stripes (Making Of)

In this article I try to explain the steps, that were necessary to get the result I presented in the previous post. The consecutive steps are explained below and a preview of the result is shown twice. The first one is the original image, the second one a coloured chequered artificial image.

  1. I decided to make a panorama from inside a tripartite pillar. The exact pillar is shown on the image below.
    Three Green Stripes Panorama Location
  2. I used my usual workflow and took three images for each direction. Furthermore I made a zenith and nadir shot. I used the Sigma 8mm F4 fisheye lens on a Sony Alpha 700 and shot RAW images. Postprocessing was made with Bibble 5 Pro.
    Three Green Stripes Raw Images
  3. I stitched the images into an equirectangular image using PTGui Pro. The final panorama was 8000×4000 pixels in size.
    Three Green Stripes EquirectangularColoured Chequered Equirectangular
  4. This equirectangular image was reprojected using again PTGui Pro using a stereographic projection with a field of view of 333° and a pitch angle of 90°. The result is the following image. The original image had a size of 5550×5550 pixel.
    Three Green Strips Cloverleaf ProjectionColoured Chequered Cloverleaf Projection
  5. For  a Droste spiral effect I had in mind you need a somehow circular masked image. I’ve chosen to mask the “leafes” and scale the image down to 4000×4000 pixel. The result was the following image :
    Three Green Stripes Cloverleaf Projection MaskedColoured Chequered Cloverleaf Projection Masked
  6. The last step in the transformation process was again a reprojection applying the Droste effect using the Pixel Bender Toolkit. You find the Pixel Bender filter and an introduction into the Droste effect in this post. The basic parameters for the Droste filter were: strandMirror: yes; transparentInside: yes; transparentOutside: yes; twist: yes; periodicity: 3; strands: 2. I played around with the rest of the parameters until I was satisfied with the result.
    Three Green Stripes Droste ReprojectionColoured Chequered Droste Spiral
Related Posts
Reprojected Droste effect panoramas of the "Three Green Stripes Panorama".

Reprojected Interior of the St. Sylvester church in Munich.

This image shows a reprojected image of the summer stage in Kronberg. The projection is transverse mercator.

A reprojected version of a spherical panorama.

There is no excerpt because this is a protected post.
In spring the meadows in the Allgäu show huge amounts of Dandelion. Everything is bright yellow from the many blossoms.

Every third year the world's largest fair - the bauma - takes place in Munich. This panorama has been taken just below the boom of a "Hitachi 2600 Ex-6".

The Cathedral of Messina has been built in the 12th century. However it had to be rebuilt after a massive earth quake in 1908 und again after a fire in World War II.

This image was taken on the Webb Bridge in Melbourne. It spans the Yarra River and the architect is Denton Corker Marshall in collaboration with artist Robert Owen.
Reprojected Three Green Stripes
Reprojected St.Sylvester Church Interior
Wooden Bridge across the river Ostrach
Reprojected summer stage in Kronberg.
Reprojected British telephone booth
Protected: Garagenflohmarkt in Kronberg/Ts.
Dandelion in May
Hitachi 2600 Ex-6 @ Bauma 2013
Cathedral of Messina – Nave
Standing on Webb Bridge (Melbourne)

Author: PanoTwin Markus

PanoTwin Markus → My images on Google Maps

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