JPS61154061U

JPS61154061U -

Info

Publication number: JPS61154061U
Application number: JP3703085U
Authority: JP
Priority date: 1985-03-14
Filing date: 1985-03-14
Publication date: 1986-09-24

Description

[Brief explanation of the drawing]

第１図は本考案による原稿認識回路のブロツク
回路図、第２図および第３図は原稿とイメージセ
ンサとの関係を示す側面図および平面図である。１……１ラインシフタ、２……差検出回路、３
……比較回路、４……第１セレクタ、５……第１
アドレスメモリ、６……第２アドレスメモリ、７
……第２セレクタ、８……ＣＰＵ、９……データ
バス、１０……アドレスカウンタ、１１……アド
レスバス、１２……主メモリ、１３……プラテン
ガラス、１４……プラテンカバー、１５……イメ
ージセンサ、Ａ……原稿。 FIG. 1 is a block circuit diagram of a document recognition circuit according to the present invention, and FIGS. 2 and 3 are a side view and a plan view showing the relationship between a document and an image sensor. 1...1 line shifter, 2...difference detection circuit, 3
... Comparison circuit, 4 ... First selector, 5 ... First
Address memory, 6...Second address memory, 7
...Second selector, 8...CPU, 9...Data bus, 10...Address counter, 11...Address bus, 12...Main memory, 13...Platen glass, 14...Platen cover, 15... Image sensor, A...original.

Claims

[Scope of utility model registration request]

a comparison circuit that compares video data obtained by scanning a document with an image sensor with video data obtained one sub-scanning period before, and generates an output when the difference becomes larger than a predetermined reference value; A memory in which the output of the comparison circuit is written to an address corresponding to the scanning position of the image sensor, and a memory that reads the contents of the memory and determines the address to which the output of the comparison circuit is written, determines the position and size of the document. A document recognition circuit comprising: a means for detecting a document recognition circuit;