LC82103 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

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LC82103

Image-Processing LSI for Facsimile, Copier, and OCR Applications

SANYO -> Panasonic 

Ordering number : EN*5402

Preliminaly

CMOS LSI

LC82103

Image-Processing LSI for Facsimile, Copier,

and OCR Applications

Overview

The LC82103 converts the analog video signal from the

CCD contact image sensor into high-precision binary

image data. The LC82103 includes an 8-bit A/D converter

and two 6-bit D/A converters. The 6-bit D/A converters

are used for setting reference potential (high and low) of

the 8-bit A/D converter. The LC82103 converts the input

analog data to high precision multilevel data, that is

produced by all pixel shading correction process, multi-

level image resolution converting process, and γ

correction process of user defined curves. That multilevel

data is converted to high-precision bi-level image that is

produced by using two dimensional filtering, a image

separation method, and an error diffusion technique.

Finally the LC82103 is able to reduce the image in the

horizontal and vertical directions, too. The LC82103

requires absolutely no external memory since it limits the

number of pixels processed to 3072/line. This LSI can

implement the image processing used by FAX, copier, and

OCR applications.

Features

• Number of pixels processed: 3072 pixels/line

• Processing speed: 250 ns/pixel maximum (When

CLKIN = 32 MHz)

• Built-in 8-bit A/D converter (with a sensor signal timing

adjustment function)

• Built-in two 6-bit D/A converters for setting the A/D

converter high and low reference potential

• Sensor drive circuit (supports CCDs and several CIS

types)

• Digital clamping (single-point clamping, even/odd

clamping)

• Distortion correction (white correction: all pixels, black

correction: settable black correction subtracted data)

• γ correction (support user-defined curves: 8-bit data)

• Image area separation (characters, photographs,

screened halftone areas)

• Simple binary coding process (fixed threshold,

brightness adaptive threshold)

• Intermediate processing error diffusion (64 levels)

• Multilevel image resolution conversion (1/2, 2/3, 3/2,

2/1)

• Binary image reduction (horizontal: thinning, fine black

line retaining, fine white line retaining, vertical:

thinning, fine black line retaining)

• Single-voltage 5 V supply and low power due to CMOS

process fabrication

Package Dimensions

unit: mm

3159-QFP64E

[LC82103]

SANYO: QFP64E

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

63096HA (OT) No. 5402-1/5

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