Image processing apparatus and method

Details Image processing apparatus and method Image processing apparatus and method

2005-12-07

2009-11-24

Patel, Kanji (Department: 2624)

Image analysis

Image compression or coding

Adaptive coding

C375S240200, C382S250000

Reexamination Certificate

active

07623720

ABSTRACT:
An image processing apparatus capable of controlling the amount of codes in the image data of one image through one-pass encoding, without changing a quantization table. A Discrete Cosine Transformation (DCT) unit performs discrete cosine transformation on each MCU of the image data of the image. A quantizer quantizes DCT coefficients resulted from the discrete cosine transformation, using the quantization table. A code amount controller sets a threshold value for each MCU based on a target amount of codes for one image and the amount of codes usable for the unprocessed MCUs, reduces the quantized DCT coefficients based on the threshold value, in order to adjust the amount of codes to be generated in the MCU.

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