| Description of variables | variables |
| Average of R, G, B color channels | Rp, Gp, Bp |
| of pericarp Average of R, G, B color channels | Rg, Gg, Bg |
| of green Average of R, G, B color channels | Rm, Gm, Bm |
| of mold Pericarp, green and mold area | Sp, Sg, Sm |