摘要 |
PROBLEM TO BE SOLVED: To realize an image signal compositing apparatus that can obtain a smooth edge and crossing area. SOLUTION: The image signal composite apparatus is provided with a circuit 10 that generates a priority signal; circuits 211 to 213 that generate a complementary signal of each key signal; circuits 214 to 216 that generate the complementary signal of each priority signal; a circuit 30 that multiplies all complementary key signals and outputs a complementary signal of the product signal as a composite key signal; a circuit 40 that applies reciprocal arithmetic operation to the composite key signal to generate a composite key reciprocal signal; circuits 51 to 53 that multiply a sum signal of the complementary priority and the complementary key signal of the image signal of a weighting object with a video signal and a key signal of the image signal and each priority signal, with respect to the image signal to apply shaping processing to each video signal; a circuit 60 that sums the video signals subjected to the shaping processing; and a circuit 70 that multiplies the summed video signal with the composite key reciprocal signal to generate a composite image signal, so as to composite the three image signals or more, at the same time. |