| 摘要 |
PURPOSE:To generate a large capacity of commodity file by generating a file expressing an input picture by using image data excluding a background and a coded key signal identifying whether the signal is the background or a file object thereby improving a data compression rate. CONSTITUTION:A TV camera 2 of a file generating device picks up an image of a commodity 2 on a background and the picked-up image signal is fed to a key signal generating circuit 3 and a file object data generating circuit 4. A converter 31 of the circuit 3 converts the signal into 3 analog color signals, which are compared with a background color setting value by comparators 32-34, a key signal is outputted form a decision device 35, subjected to run length coding 5 and the result is fed to a disk I/O circuit 6. Further, the image signal is subjected to A/D conversion 43, a DPCM coding circuit 44 of the circuit 4 output image data for file, which is fed to the circuit 6. Then the key signal from the circuit 6, 3 and the data from the circuit 4 are processed by the control of a CPU 7 to generate a large capacity of commodity file.
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