LC82101 Description
EN 4982A CMOS LSI LC82101 Image Processing Circuit for FAX, Copier, and OCR Products Preliminary Overview The LC82101 converts an analog image signal from a CCD or contact sensor to high-quality binary image data. The LC82101 uses an internal 8-bit A/D converter for A/D conversion, and in addition to the orthodox dithering technique, also supports an error diffusion technique that allows an even higher quality image...
LC82101 Key Features
- Number of pixels processed 2048 pixels/line (64 KB memory, white correction only) 4096 pixels/line (256 KB memory, both
- Processing speed 500 ns/pixel maximum (The processing time for 1 pixel is 16/SYSCLK.)
- Supports medium speed products with a single external memory chip 100 ns access time memory allows 800 ns/pixel processi
- AGC (The A/D converter high-level reference voltage is varied from 1.2 to 4.2 V in 0.2 V steps.)
- Built-in 8-bit A/D converter (includes a sensor signal delay adjustment function)
- Sensor drive circuit (supports CCD and all CIS types)
- Digital clamp (single-point clamp, even/odd clamp)
- Distortion correction (white correction, black correction, full-pixel correction)
- Gamma correction (supports user-defined curves)
- Image area separation (text, photographs, halftone)