Method and device for coding a digitized image

A method for encoding a digitized image with image segments that include picture elements to which a respective encoding information is allocated, upon employment of a stored, chronologically proceeding image having preceding image segments that have preceding picture elements to which a respectively preceding encoding information is allocated, comprising the steps of:

• selecting a preceding image segment dependent on a predetermined start vector that indicates a topical shift of an image segment relative to the preceding image segment;
• forming an error criterion between encoding information of the image segment and preceding encoding information of the preceding image segment;
• forming the error criterion such that differences of the encoding information of different picture elements are different weighted;
• carrying out a check to see whether the error criterion is smaller than a threshold;
• when the error criterion is smaller than the threshold, avoiding subjecting the image segment to any residual error encoding;
• subjecting the image segment to the residual error encoding and to an entropy encoding when the error criterion is not smaller than the threshold;
• and
• weighting the differences of encoding information of picture elements that are located in an edge region of a prescribable size of an image segment higher than differences of encoding information of picture elements outsides the edge region.

An apparatus for encoding a digitized image with image segments that include picture elements to which an encoding information is allocated, upon employment of a stored, chronologically preceding image with preceding image segments that have preceding picture elements to which preceding encoding information is allocated, comprising:

• a processor unit that is configured such that:
• a preceding image segment is selected proceeding from a predetermined start vector with which a topical shift of the image segment relative to the preceding image segment is indicated;
• an error criterion between encoding information of the image segment and preceding encoding information of the preceding image segment is formed;
• a check is carried out to see whether the error criterion is smaller than a first threshold;
• when the error criterion is smaller than the first threshold, the image segment is not subjected to any residual error encoding;
• otherwise, the image segment is subjected to the residual error encoding and an entropy encoding;
• when the error criterion is smaller than the first threshold, the following steps are implemented;
• at least one further error criterion between the image segment and the preceding image segment is formed for the image segment;
• when the second error criterion is smaller than a second threshold, the image segment is not subjected to any residual error encoding;
• otherwise, the image segment is subjected to the residual error encoding and to an entropy encoding.

An apparatus for encoding a digitized image with image segments that include picture elements to which an encoding information is allocated, upon employment of a stored, chronologically preceding image with preceding image segments that have preceding picture elements to which preceding encoding information is allocated, comprising:

• a processor unit that is configured such that:
• a preceding image segment is selected proceeding from a predetermined start vector with which a topical shift of the image segment relative to the preceding image segment is indicated;
• an error criterion between encoding information of the image segment and preceding encoding information of the preceding image segment is formed;
• a check is carried out to see whether the error criterion is smaller than a first threshold;
• when the error criterion is smaller than the first threshold, the image segment is not subjected to any residual error encoding;
• otherwise, the image segment is subjected to the residual error encoding and an entropy encoding;
• the processor unit being further configured such that the weighting ensues such that differences of encoding information of picture elements that are located in an edge region of prescribable size of an image segment are weighted higher then differences of encoding information of picture elements outside the edge region.