Method and apparatus for determining a detection of a defective object in an image sequence as a misdetection

Apparatus for determining a detection of a defective object to be replaced by a replacement pattern in a frame of a sequence of image frames as a misdetection, comprising

• a first similarity determination unit configured to determine a value of a first similarity measure between a boundary of the detected defective object and a boundary of the replacement pattern;
• a second similarity determination unit configured to determine a value of a second similarity measure between pixels enclosed by the boundary of the detected defective object and pixels enclosed by the boundary of the replacement pattern;
• and
• a misdetection determination unit configured to determine the detection of the defective object as a misdetection if at least one of the following holds true:
• the value of the first similarity measure is outside of a corresponding first similarity acceptance range and the value of the second similarity measure is inside of a corresponding second similarity acceptance range.

Computer readable storage medium having stored therein instructions enabling determination of a detection of a defective object to be replaced by a replacement pattern in a frame of a sequence of image frames as a misdetection, wherein the instructions, when executed by a computer, cause the computer to:

• determine a value of a first similarity measure between a boundary of the detected defective object and a boundary of the replacement pattern;
• determine a value of a second similarity measure between pixels enclosed by the boundary of the detected defective object and pixels enclosed by the boundary of the replacement pattern;
• and
• determine the detection of the defective object as a misdetection if at least one of the following holds true:
• the value of the first similarity measure is outside of a corresponding first similarity acceptance range and the value of the second similarity measure is inside of a corresponding second similarity acceptance range.