The character field extracting equipment, the image pickup device, and the character field selection program null subject which have character

摘要

The letter territory extracting equipment, the letter territory in order to specify at high accuracy, subject accepts the graphics data which image pickup is done from the graphics data which includes the part where light and shade value contrast differs graphics data the whole to binary converts with 1st threshold, separates from into the reflexive domain where pixel value has been saturated and the irreflexive territory where pixel value is non saturation. Next, to binary converting the reflexive domain with 2nd threshold, it separates from into the letter territory and the background region. To binary converting the irreflexive territory in the same way with 3rd threshold, it separates from into the letter territory and the background region. It integrates each letter territory of the reflexive domain and the irreflexive territory, information of position of the letter territory with the graphics data specifies.