Commits on May 26, 2026

1. Implement image.equation op

   This implementation brings back the image.equation Op from ImageJ Ops,
   but using Parsington instead of JavaScript for deterministic evaluation.
   
   - Equation.java — the image.equation Op with a Computer signature
     (String, RandomAccessibleInterval<T>)). Parses the expression once
     into a SyntaxTree, then iterates pixels with a localizing cursor,
     updating position before each evaluation. Any per-pixel runtime error
     yields NaN.
   
   - EquationEvaluator.java — extends Parsington's DefaultTreeEvaluator.
     Exposes p[0..n], x/y/z/t, pi/e, and reflects every public-static
     numeric java.lang.Math method.
   
   - EquationTest.java — 10 tests covering constants, p[i], axis
     shorthands, single- and multi-arg math, pi/e, a 3D image,
     reproducibility, random() distribution, and the NaN-on-bad-expression
     contract.
   
   Adds parsington as a dependency to scijava-ops-image.
   
   Notable design notes:
   - parens(...) returns the single arg unwrapped, or an Object[] for
     multi-arg, so function() can pick Math overloads.
   - brackets(...) returns a marker BracketIndex so function(fn, args)
     can distinguish p[i] from cos(x).
   - Multi-arg function args came through as unresolved Variable tokens;
     resolved via Parsington's value(arg) before reflection.
   - Single-threaded for now — Parsington's evaluator is stateful, and the
     op is documented as a demo helper, so top performance is not critical.
   
   Co-authored-by: Claude Opus 4.7 <[email protected]>

   

   ctrueden and claude committed May 26, 2026
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2. Update copyright headers for 2026

   

   ctrueden committed May 26, 2026
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