Methods and systems of generating a background picture for video coding

An apparatus for generating a background picture for coding one or more pictures comprising:

• a memory configured to store video data;
• and
• a processor configured to:
• generate a long-term background model for one or more pixels of a background picture, the long-term background model including a statistical model for modeling a background portion of a scene captured by a sequence of pictures;
• generate a short-term background model for the one or more pixels of the background picture, the short-term background model detecting short-term motion of the one or more pixels between two or more pictures, wherein short-term motion of a pixel at a pixel location in the two or more pictures is detected by determining an absolute difference between pixel values of the pixel at the pixel location in the two or more pictures;
• obtain a picture, the picture including one or more pixels at one or more pixel locations corresponding to the one or more pixels of the background picture;
• and
• update one or more values for the one or more pixels of the background picture using the long-term background model and the short-term background model, wherein a value of a pixel at a pixel location in the background picture is updated to a value of the pixel at the pixel location in the obtained picture when the long-term background model detects a long-term change in intensity within a long-term range and the short-term background model detects a short-term change in intensity within a short-term range, and wherein the background picture is used for coding at least one picture.

A non-transitory computer readable medium having stored thereon instructions that, when executed by one or more processors, cause the one or more processor to:

• generate a long-term background model for one or more pixels of a background picture, the long-term background model including a statistical model for modeling a background portion of a scene captured by a sequence of pictures;
• generate a short-term background model for the one or more pixels of the background picture, the short-term background model detecting short-term motion of the one or more pixels between two or more pictures, wherein short-term motion of a pixel at a pixel location in the two or more pictures is detected by determining an absolute difference between pixel values of the pixel at the pixel location in the two or more pictures;
• obtain a picture, the picture including one or more pixels at one or more pixel locations corresponding to the one or more pixels of the background picture;
• and
• update one or more values for the one or more pixels of the background picture using the long-term background model and the short-term background model, wherein a value of a pixel at a pixel location in the background picture is updated to a value of the pixel at the pixel location in the obtained picture when the long-term background model detects a long-term change in intensity within a long-term range and the short-term background model detects a short-term change in intensity within a short-term range, and wherein the background picture is used for coding at least one picture.