This book presents the results of the 4th International Conference on Computer Recognition Sstems CORES'05 held May 22-25, 2005 in Rydzyna Castle, Poland. It brings together original research results in both methodological issues and different application areas of pattern recognition. The contributions cover all topics in pattern recognition -Classification and interpretation of text, video, voice-Statistical, soft and structural methods of pattern recognition -Image processing, analysis and interpretation -Machine learning -Data and Web mining -Knowledge-based decision support systems -Advanced signal processing methods or -Special hardware architecture.