Fix #1471. Fix FFT calibration for odd dimensions. Test.#69
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After reviewing this I spotted nion-software/nionswift#1600, it could be related, but since I see it on both odd and even dimensions, I have assumed it is separate and added it as a new issue. |
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I'm planning on holding off merging this until we re-open the projects for patches, which are on hold in order to reach a stable version. So we have time to review/fix related issues. I'd also like to put nion-software/nionswift#1596 into the fray. |
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Fixes #70.
Please review this carefully. The tests describe the calibration assumptions for the zero frequency position: 0.5 into the "center" pixel.
NOTE: this is easiest to test if you apply nion-software/nionswift#1597 (fix drawing of spot graphics) if it hasn't already been merged.