Drop the light column and rename chaff to pollution

README.md

@@ -39,13 +39,13 @@ protocol is built around label correctness.
 | Images with point annotations | 193 |
 | Splits | test: 131, train: 728 |
 
-| Session | Species | Lot | Light | Chaff | Cameras | Images | Arrangements | Kernels |
-|---|---|---|---|---|---|---|---|---|
-| S01 | rye-w | rye-w-A | desk | light | Galaxy S23, iPhone 8 | 108 | 27 | 274–787 |
-| S02 | oats-s | oats-s-A | desk | none | Galaxy S23, iPhone 8 | 124 | 31 | 240–798 |
-| S03 | barley-w | barley-w-A | desk | light | Galaxy S23, Galaxy Tab S6 Lite, iPhone 8 | 231 | 28 | 225–733 |
-| S04 | wheat-w | wheat-w-A | desk | light | Galaxy Tab S6 Lite, Pixel 9 | 131 | 33 | 170–800 |
-| S05 | durum-w | durum-w-A | desk | light | Galaxy S23, iPhone 8 | 265 | 31 | 230–782 |
+| Session | Species | Lot | Pollution | Cameras | Images | Arrangements | Kernels |
+|---|---|---|---|---|---|---|---|
+| S01 | rye-w | rye-w-A | light | Galaxy S23, iPhone 8 | 108 | 27 | 274–787 |
+| S02 | oats-s | oats-s-A | none | Galaxy S23, iPhone 8 | 124 | 31 | 240–798 |
+| S03 | barley-w | barley-w-A | light | Galaxy S23, Galaxy Tab S6 Lite, iPhone 8 | 231 | 28 | 225–733 |
+| S04 | wheat-w | wheat-w-A | light | Galaxy Tab S6 Lite, Pixel 9 | 131 | 33 | 170–800 |
+| S05 | durum-w | durum-w-A | light | Galaxy S23, iPhone 8 | 265 | 31 | 230–782 |
 
 ## Fields
 
@@ -57,8 +57,7 @@ protocol is built around label correctness.
 | `session`, `step`, `take` | Session ID, card number within the session, and re-shoot number after a REDO. |
 | `species` | `rye-w` winter rye, `durum-w` winter durum wheat, `barley-w` winter barley, `oats-s` spring oats, `wheat-w` winter soft wheat. |
 | `lot` | Seed lot the kernels come from. |
-| `light` | Lighting setup of the session (free text). |
-| `chaff` | `none`, `light` or `heavy`: amount of chaff, awns and broken kernels mixed in. **Never counted.** |
+| `pollution` | `none`, `light` or `heavy`: amount of chaff, awns, broken kernels, pebbles, dust or office materials mixed in. **Never counted.** |
 | `camera` | Camera model from EXIF. |
 | `taken_at` | Capture time from EXIF (camera clock, no time zone). |
 | `raw_file` | Path of the original raw file in this repo (`raw/…`) if the photo was shot as DNG; else empty. |
@@ -78,9 +77,9 @@ oats count with their husk. Twins count as two kernels.
 **Never counts:** broken kernels; chaff, straw and awns; foreign seeds, dust and stones.
 Borderline cases were sorted out rather than judged, to keep the count exact.
 
-**Chaff and broken kernels in the data:** they will occur in the use case, so some sessions
-deliberately contain them as noise (`chaff` = `light` or `heavy`). They are never part of
-`count`.
+**Pollution in the data:** chaff, awns, broken kernels, pebbles, dust or office materials will
+occur in the use case, so some sessions deliberately contain them as noise (`pollution` =
+`light` or `heavy`). They are never part of `count`.
 
 ### Materials
 
@@ -90,7 +89,7 @@ deliberately contain them as noise (`chaff` = `light` or `heavy`). They are neve
 
 ### Procedure
 
-Each session covers one species, one seed lot, one lighting setup and one chaff level, and
+Each session covers one species, one seed lot and one pollution level, and
 follows a pre-generated plan of about 30 session cards. Each card carries a QR code and
 states the new total and what to add or remove (`add 17`, `remove 12`, `add 1 cup + 9`).
 
@@ -110,22 +109,21 @@ the number on the current card, and the card and the layout are photographed aga
 
 ### Variation between sessions
 
-Lighting (window light, desk lamp, cold and warm light, morning and evening), phones (see
-the table above) and backgrounds (table, mat, tray, floor).
+Phones (see the table above) and backgrounds (table, mat, tray, floor).
 
 ### Sessions
 
-- **S01:** winter rye (`rye-w-A`), light chaff, desk light; Galaxy S23 and iPhone 8;
+- **S01:** winter rye (`rye-w-A`), lightly polluted; Galaxy S23 and iPhone 8;
   2026-09-15/16.
-- **S02:** spring oats (`oats-s-A`), no chaff, desk light; Galaxy S23 and iPhone 8;
+- **S02:** spring oats (`oats-s-A`), not polluted; Galaxy S23 and iPhone 8;
   2026-10-02.
-- **S03:** winter barley (`barley-w-A`), light chaff, desk light; Galaxy S23 (shot as DNG),
+- **S03:** winter barley (`barley-w-A`), lightly polluted; Galaxy S23 (shot as DNG),
   iPhone 8 and Galaxy Tab S6 Lite; shot over three days, 2026-09-16 to 09-21.
-- **S04:** winter soft wheat (`wheat-w-A`), light chaff, desk light; Pixel 9 and Galaxy Tab
+- **S04:** winter soft wheat (`wheat-w-A`), lightly polluted; Pixel 9 and Galaxy Tab
   S6 Lite; 2026-10-15. Test data. The tablet missed or misdated the photos of cards 0, 3, 8,
   14 and 15; its photos of those layouts were placed on the card by hand and checked
   against the Pixel photos.
-- **S05:** winter durum wheat (`durum-w-A`), light chaff, desk light; Galaxy S23 (shot as
+- **S05:** winter durum wheat (`durum-w-A`), lightly polluted; Galaxy S23 (shot as
   DNG) and iPhone 8; 2026-10-15.
 
 ### Labelling
@@ -176,8 +174,8 @@ a kernel was missed or lies at the edge of the frame. `count` stays the label.
 ## Known limitations
 
 - Only the species and lots in the table above so far.
-- Some sessions contain chaff and broken kernels (`chaff` ≠ `none`). They are visible in the
-  photos and deliberately not part of the count.
+- Some sessions contain pollution (`pollution` ≠ `none`). It is visible in the photos and
+  deliberately not part of the count.
 
 ## Contributing
 
@@ -187,7 +185,7 @@ here is generated by the export script from reviewed labels; photos without a
 [project repository](https://github.com/SmartFarmingLab/corn1000) (private, access on
 request from the Smart Farming Lab).
 
-1. **Plan:** `tools/plan_session.py <SESSION> --species … --lot … --light … --chaff …`
+1. **Plan:** `tools/plan_session.py <SESSION> --species … --lot … --pollution …`
    writes `sessions/<SESSION>/plan.json` and the cards to print. Keep `plan.json`: it is
    the reference the labels are checked against.
 2. **Shoot** the session as described under [Procedure](#procedure).