anchor.diff:      module Jpeg =
           open Aardvark.Base
   
  -        let inverseZigZagOrder =
  +        let zigZagOrder =
               [|
                   0;  1;  8;  16;  9;  2;  3; 10
                   17; 24; 32; 25; 18; 11;  4;  5
  
positive.code:                 53; 60; 61; 54; 47; 55; 62; 63
              |]
  
          let zigZagOrder =
              [|
                  0; 1; 5; 6; 14; 15; 27; 28
                  2; 4; 7; 13; 16; 26; 29; 42
  
negative.code: 
          let quantify (block : V3d[]) =
              let round (v : V3d) = V3i(int (round v.X), int (round v.Y), int (round v.Z))
              Array.map3 (fun ql qc v -> round(v / V3d(float ql,float qc,float qc))) QLum QChrom block
  
  
          module Huffman = 
  