Method for detecting an object in a search image, method for generating a pattern vector, and use of a method for determining a position and/or orientation of a security element of a banknote

A method for detecting an object in a search image, having the following steps:

• a) providing a pattern vector, which describes the object by way of coordinates of characteristic pixels;
• b) displacing the pattern vector over various positions of the search image;
• c) defining a respective success value at the various positions;
• and
• d) detecting the object at the position on the basis of the success value,
• wherein
• a first direction and a second direction different from the first direction is assigned to each characteristic pixel by the pattern vector,
• wherein in each case a first intensity overall value of a first number of one-dimensionally arranged pixels in the first direction is determined and a second intensity overall value of a second number of one-dimensionally arranged pixels in the second direction is determined,
• wherein in each case a difference value is determined between the first intensity overall value and the second intensity overall value,
• wherein the success value is determined on the basis of the respective difference values,
• wherein the object is detected on a banknote.