Print a marker card and include it in your scene photo or video. PackOps detects the marker automatically and applies real-world scale to the captured object — no more guessing at dimensions, no manual two-click calibration.
Each print is unique. Every download mints its own serial & QR, so each physical card can be individually self-measured for true scale — reprint any time for a fresh, distinct card. Every color is a distinct marker at the same size, so several cards can share one photo without colliding — carry a size in two or three colors. Sign in to print a tracked marker.
Inch-native scale anchors for US packaging plants. Print, cut, and place in the scene. Auto-detected on upload. Measure with an inch ruler — no conversion.
Millimetre-native scale anchors. Print, cut, and place in the scene. Auto-detected on upload. Measure with a metric ruler.
Room-scale calibration boards (DICT_4X4_1000). Each color is a distinct marker-id range, so two boards of different colors can share one scene. Mint a serial, send the PDF to a sign shop: 3 mm Dibond, direct UV print, matte, no laminate — the full shop guide is page 2 of every PDF. Print at 100% scale and verify a square edge with the ruler named on the sheet.
Scale error as a percentage of measured length, by marker size, camera distance, and sensor resolution (assumes a ~70° wide phone camera, ~0.5 px corner detection). Error roughly halves at higher resolution — use your phone’s highest-resolution still mode. Calibrating the printed marker (a ruler in your card’s unit + two photos) removes the separate ±1–3% print-scale error on top of this. These figures are unit-agnostic (scale error is a percentage): the imperial cards map to the nearest row — 1″ ≈ 30 mm, 2″ ≈ 50 mm, 4″ ≈ 100 mm.
| Camera distance | 12 MP | 24 MP | 48 MP |
|---|---|---|---|
| 0.5 m | ±0.29% | ±0.19% | ±0.15% |
| 1 m | ±0.58% | ±0.39% | ±0.29% |
| 2 m | ±1.16% | ±0.77% | ±0.58% |
| Camera distance | 12 MP | 24 MP | 48 MP |
|---|---|---|---|
| 1 m | ±0.35% | ±0.23% | ±0.18% |
| 2 m | ±0.69% | ±0.46% | ±0.35% |
| 3 m | ±1.04% | ±0.69% | ±0.53% |
| Camera distance | 12 MP | 24 MP | 48 MP |
|---|---|---|---|
| 1 m | ±0.17% | ±0.12% | ±0.09% |
| 3 m | ±0.52% | ±0.35% | ±0.26% |
| 5 m | ±0.87% | ±0.58% | ±0.44% |
For sales-rep capture sessions and high-value-customer dimensioning visits. Sub-pixel chessboard-corner detection plus on-device camera calibration give roughly 5× tighter scale precision than the Aruco markers above. Trimmed board is 1.10 × 0.65 m (functional 1 × 0.5 m chessboard plus margins); prints direct-to-Dibond at a sign shop — lightweight, dead flat, survives the trunk of a car. Cut line + corner crop marks + CNC handle slot included.
Functional area 1000 × 500 mm (10 × 5 squares at 100 mm, markers 70 mm, DICT_4X4_50), with a 50 mm margin on the top + sides, a 100 mm info strip at the bottom, and 10 mm bleed with corner crop marks. Spec, print-verify warning, and placement / capture instructions are printed directly on the board; full sign-shop + handling guide is page 2.