Panoramic TWPC presentation rev NC Sep15 TWPC presentation rev NC Sep15.pdfMicrosoft PowerPoint -...
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Copyright – Glynn’s Stuff dot com Tettenhall Wood Photographic Club Panoramic Images Glynn Thomas rev NC
Transcript of Panoramic TWPC presentation rev NC Sep15 TWPC presentation rev NC Sep15.pdfMicrosoft PowerPoint -...
Copyright – Glynn’s Stuff dot com
Tettenhall WoodPhotographic Club
Panoramic Images
Glynn Thomasrev NC
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Contents• Section of Images• Nodal Point• Basic Pano processing• Have a go!
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The Corn Exchange
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The Corn Exchange• Location - Leeds• Tripod mount x8 (ish) portrait images• Rotation about camera mount (not nodal point)• 10-20mm sigma lens (DX)• Minimal fiddlin’ to remove clutter
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The Corn ExchangeVertorama• Location - Leeds• Hand held• x10 (ish) landscape images• 10-20mm sigma lens (FX)• Puppet warp to square up• Clone out my feet!
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360° Garden
• Location - Portmeirion• Tripod mount x6 portrait images• Rotation about nodal point• 16-35mm Nikon lens (FX)• Each image first reduced to 50% (memory size!)• Couldn’t get bottom of flower beds in – bummer!
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Upstairs DownstairsVertorama• Location – Inveraray Castle• Hand held• x12 landscape images• 10-20mm sigma lens (FX)• Puppet warp and skew to
square up• Clone out some highlights
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Hotel Bar
• Location - Shanghai• Tripod mount x6 portrait images• Rotation about nodal point• 16-35mm Nikon lens (FX)• Each image first reduced to 50% (memory size!)• HDR pre-processing (story for another day!)
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Oasis in the city
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Oasis in the city
• Location - Shanghai• Tripod mount x6 portrait images• Rotation about nodal point• 16-35mm Nikon lens (FX)• Each image first reduced to 50% (memory size!)• Clone to create tops of buildings (ahh!)• Globe processing
– Create 360– Stretch to square format– Turn upside down– Filter > Distort > Polar Coordinates (Rectangular to Polar)
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Nodal Point• What is the nodal point?• Rotational centre of lens is not the rotation axis of
camera mount• This can produce parallax errors• Produces errors in photoshop stitching• Try this
– Hold up one finger vertically on each hand– Hold one arm outstretched one close to your face, fingers aligned– Rotate your head, do your fingers stay in line?
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Nodal Point
Poor nodal adjustment
30° rotationObjects swap places
30° rotationObjects unchanged
Good nodal adjustment
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Nodal Point
Moving NodalPoint over rotation axis
• Arrange two vertical objects
• Rotate camera• Observe objects• Moves slider in-out• All lenses are
different• All focal lengths of
zoom are different• Write down the scale
markings
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Basic Pano processing• Taking stage
– Plan your full shot– Careful with levels (use spirit level)– Meter for brightest part of image– Switch to manual– Careful with polarisers– Take outdoor images fairly quickly (avoid light changes)
• Pre-process RAW images– Apply identical develop settings (lightroom)
• Photoshop– File>automate>photomerge
> Auto or cylindrical / tick blend, vignette, distortion> Order of images can be a problem
– Crop and/or fill in missing corners
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Basic Pano processing• The order I wanted
• The order photoshop wanted
• Solution– Crop side of one of the ‘end’ images so it doesn’t match up
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