Method for estimating the volume of a remaining fluidum in a non-translucent recipient using an image of the recipient

A method of estimating a volume of a remaining fluidum in a non-translucent recipient having an opening at a top side of the recipient which area of the opening is wider than or equal to the area of a bottom of the recipient, the method being implemented as an application program for an electronic device having a camera, said method comprising the steps of:

• taking a picture of the opening at the top side of the recipient by means of the camera;
• the electronic device:
• deriving from the picture characteristics of a first number of pixels representing a visible part of the recipient;
• deriving from the picture characteristics of a second number of pixels representing a visible part of the fluidum in the recipient;
• requesting from a user an identification of the recipient;
• receiving from the user the identification of the recipient;
• matching the received identification with a stored identification in order to retrieve reference data about an empty recipient;
• and
• estimating a volume of the remaining fluidum in the recipient by means of the retrieved reference data and a ratio of the characteristics of the first number of pixels and the characteristics of the second number of pixels,
• wherein
• the picture is taken from a first arbitrary angle to the recipient and from a first arbitrary distance to the recipient as long as the remaining fluidum and the recipient are visible for the camera,
• wherein
• a picture for creating the reference data is taken from a second arbitrary angle to the recipient and from a second arbitrary distance to the recipient as long as the remaining fluidum and the recipient are visible for the camera, and
• wherein the second arbitrary angle and the second arbitrary distance are independent from the first arbitrary angle and from the first arbitrary distance respectively.