| 摘要 |
An image coding system includes an optical system 1, an image pick-up unit 2, a color space/pixel number converting unit 4, an orthogonal converting unit 5, a quantizing unit 6, a variable run length coding unit 7 and a storing/transmitting unit 10. The system further includes a code volume control unit 8 for providing, in a first coding process, image data obtained from the color space/pixel number converting unit 4 as a result of omission of at least the color space conversion, among the color space and pixel number conversions, to the orthogonal conversion unit 5, and computing quantizing coefficient data adequate for obtaining a target code volume from the code volume of coded data provided from the orthogonal converting unit 5 and the target code volume. In a second coding process, the color space/pixel number converting unit 4 executes both of the color space and pixel number conversions and provides resultant image data to the orthogonal converting unit 5 or storage and/or transmission of coded data provided as a result from the orthogonal converting unit 5.
|
