Limitations

The dimensioning framework can handle a wide range of parcels, with the following limitations.

Black Surfaces

The 3D sensor cannot reliably detect black surfaces. Under the following conditions, parcel dimensioning attempts timeout to a

NoDim

(no dimension) result.

Black parcels - This includes parcels wrapped in black material.

Black floor - The floor must be recognized for dimensions to be calculated. Dimensioning on grey surfaces, such as asphalt, should be possible even in sunny conditions.

Black tape - This applies to black tape on the top edges of the parcel. You can dimension parcels with black tape across the middle by making sure the aimer is not on the black tape. If the aimer is on the black tape, the parcel may not be dimensioned.

Highly Reflective Surfaces (Specular Reflection)

The 3D sensor cannot reliably dimension with highly reflective surfaces such as shiny metal walls or mirror-like reflective surfaces that produce a specular reflection. The user must dimension the targeted parcel with these surfaces outside the field-of-view of the camera (i.e., not within the viewfinder display).

Shiny metal walls and floor – mostly unpainted bare metal that produces a mirror-like reflection

Shiny containers – metal containers next to the target parcel

Mirrored walls

Metal tape – this applies to metal tape on the visible surfaces or edges of the parcel.

Long or Thin Parcels

Parcels where one dimension is near the maximum and one dimension is near the minimum may lead to a

NoDim

(no dimension) result.

For example, a parcel measuring 100 x 15 x 15 cm

(40 x 6.0 x 6.0 inches)

may not produce a dimensioning result. However, a parcel measuring 50 x 15 x 15 cm

(20 x 6.0 x 6.0 inches)

should produce a result.

Directional Feedback

To receive directional feedback, the dimensioning service must be able to identify that there is a parcel in the field-of-view.

If the device is too close to the parcel, move further away until the entire parcel is visible in the Viewfinder. The ToF camera cannot dimension a parcel closer than the minimum range of the ToF camera

(~40 cm)

(~40 cm or 16 inches)

. Also, when the device is too close to the parcel, it can cause glare, which can interfere with dimensioning.

If the device is too far from the parcel, move closer and fill more of the display area with the parcel.

If the dimensioning angle is too steep, move or tilt the device to keep the angle within 50° of the top-down (0%) position. The device provides tilt feedback when the angle is too steep.

Drawing that shows good and bad viewing angles of a parcel — Dimensioning Angles

Application Interactions

Google Voice Assistant - Google Voice Assistant will not launch when the dimensioning screen is active.

Repeated Rotations - Repeatedly rotating the dimensioning device may cause the Mobile Dimensioning demonstration client Start Dimensioning button to be grayed out. Restart the application to clear the condition.

Repeated Open/Close of the Mobile Dimensioning demonstration application - Repeated opening and closing of the application in quick succession may cause the Mobile Dimensioning demonstration client Start Dimensioning button to be grayed out. Restart the application to clear the condition.

Split screen mode - Android Split Screen mode is not supported.

Guest mode - Android Guest mode is not supported.