TY - Computer Science A1 - LIU Hua-yong and LI Tao T1 - Key Frame Extraction Algorithm Based on Improved Block Color Features and Second Extraction Y1 - 2018-11-14 JF - Computer Science JO - Computer Science SP - 307 EP - 311 VL - 42 IS - 12 UR - https://www.jsjkx.com N1 - ER -