Daisy Droste

Posted by barnoid Sun, 29 Jul 2012 21:42:21 GMT

Daisy Droste
Had a play with Mathmap again, using the expression found here.
MakeCanon
ModelCanon EOS 5D Mark II
Exposure0.002 sec (1/500)
Aperturef/8.0
Exposure ProgramAperture-priority AE
ISO Speed100
Date and Time (Original)2012:07:21 12:54:11
Exposure Bias0 EV
FlashOff, Did not fire
Focal Length92 mm
QualityFine
Metering ModeEvaluative
Lens TypeCanon EF 24-105mm f/4L IS
Camera Temperature27 C

Sunflower Droste

Posted by barnoid Mon, 29 Sep 2008 13:11:02 GMT

Sunflower Droste
Droste Effect Sunflower. Created with the Mathmap GIMP plugin and the Droste script by Josh Sommers. How it’s done: Starting with a sunflower photo with a nice plain sky background I used the select by colour tool to select the background. Then by promoting the background layer to a proper layer I cut out the sky to leave the sunflower on the transparent checkerboard. On the first go with Mathmap I found the petals still had bright edges because they used to be against a bright sky, which looked wrong against the dark flower centre. So I went back so the selection stage, grew the selection by 3 pixels so it cut off the edges of the petals and then feathered it by 3 pixels. Then I cut the sky off. Now I had just the flower with gradual transparency around the edge. I grabbed a nice brown from the middle of the flower using the eyedropper and created a new layer under the flower layer filled with that colour. Then I flattened and again cut out the flower from the background using fuzzy select this time. Now at last I had a flower with a brown fringe around the edge. Finally I stuck it in Mathmap, selected Droste and turned on ExternalTransparency because that’s what it has. Tweaked the parameters and here is the result. Parameters: InnerRadius 29.56 OuterRadius 91 Periodicity 1.02 Strands 1 XCenterShift 2 YCenterShift -4 StartingLevel 5 ExternalTransparency on
MakeCanon
ModelCanon EOS 300D DIGITAL
Exposure0.008 sec (1/125)
Aperturef/9.0
ISO Speed100
Date and Time (Original)2006:09:05 15:07:40
Exposure Bias-2 EV
FlashNo Flash
Focal Length31 mm
QualityFine
Metering ModeEvaluative
Lens TypeUnknown (-1)