Abstract: A method for decoding an image based on an intra prediction, comprising: obtaining a first prediction pixel of a first region in a current block by using a neighboring pixel adjacent to the current block; obtaining a second prediction pixel of a second region in the current block by using the first prediction pixel of the first region; and decoding the current block based on the first and the second prediction pixels.

Abstract: A system for obtaining position data of cops on a winder while the cops are carried in a direction along a predetermined conveyance path having sections, connections of sections and sections where movement of the cops in a direction from one of the sections to another of the sections is to be confirmed. Ends of yarn of each of the cops are found in a yarn end feeding portion of the winder. The yarn of the cops is unwound from the cops in a plurality of winding-units of the winder. Remaining yarn on any of the unwound cops is detected in a remaining yarn sensing portion of the winder, and yarnless cops are finally discharged from the winder. Sensors detect only the presence of any one of the cops at respective sensor positions along the predetermined conveyance path.