JP2016213907A5

JP2016213907A5 -

Info

Publication number: JP2016213907A5
Application number: JP2016184113A
Authority: JP
Filing date: 2016-09-21
Publication date: 2017-03-30
Anticipated expiration: 2032-03-19

Description

本願請求項１の発明は、大容量の画像メモリを必要とせずに、様々なサイズの原稿を読み取ることができる原稿読取装置を提供することを目的とする。 The invention of claim 1, without the need for large-capacity image memory, and an object thereof is to provide a document reading apparatus capable of reading an original of various sizes.

本願請求項１記載の原稿読取装置は、原稿が載置かれる原稿トレイと、原稿を搬送する搬送手段と、第１読取位置を通過する前記搬送される原稿における第１面を読み取る第１読取手段と、前記第１読取位置の下流に位置する第２読取位置を通過する前記搬送される原稿における前記第１面と異なる第２面を読み取る第２読取手段と、前記第１読取手段から出力された第１画像データおよび前記第２読取手段から出力された第２画像データを記憶する記憶手段と、前記原稿のサイズを決定する決定手段と、前記第１画像データおよび前記第２画像データの前記記憶手段への書き込みおよび前記記憶手段に記憶された前記第１画像データおよび前記第２画像データの読み出しを制御する制御手段とを有し、前記制御手段は、前記記憶手段の記憶領域における第１開始位置から前記第１画像データを書き込み、前記記憶領域における前記第１開始位置から前記決定手段によって決定された原稿のサイズに対応した記憶領域以上後ろの位置から第２画像データを書き込むとともに、該第２画像データの書き込み先が前記記録領域の後端に達した場合該第２画像データを前記第１開始位置から書き込み、前記第１開始位置に前記第１画像データを書き込んでから所定時間後に前記書き込まれた第１画像データを読み出し、前記第１面にかかる第１画像データの転送を終了後に、前記第２画像データを読み出すことを特徴とする。 The document reading apparatus according to claim 1 is a document tray on which a document is placed, a transport unit that transports a document, and a first reading unit that reads a first surface of the transported document that passes through a first reading position. A second reading unit that reads a second surface different from the first surface of the conveyed document that passes through a second reading position located downstream of the first reading position, and is output from the first reading unit. Storage means for storing the first image data and the second image data output from the second reading means, a determination means for determining the size of the document, and the first image data and the second image data. and control means for controlling reading of the stored first image data and second image data to the writing and the storage means to the storage means, said control means stores in the storage means The first image data is written from the first start position in the area, and the second image data is written from the position after the storage area corresponding to the document size determined by the determining means from the first start position in the storage area. When the writing destination of the second image data reaches the rear end of the recording area, the second image data is written from the first start position, and the first image data is written to the first start position. The first image data written is read after a predetermined time from the first time, and the second image data is read after the transfer of the first image data on the first surface is completed .

本願請求項１の発明によれば、原稿読取装置において、大容量の画像メモリを必要とせずに、様々なサイズの原稿を読み取ることができる。 According to the invention of claim 1, in the original manuscript reader, without the need for large-capacity image memory, Ru can read documents of various sizes.

Claims

A document tray on which documents are placed;
Conveying means for conveying an original;
First reading means for reading a first surface of the conveyed document passing through a first reading position ;
Second reading means for reading a second surface different from the first surface of the conveyed document passing through a second reading position located downstream of the first reading position ;
Storage means for storing the first image data output from the first reading means and the second image data output from the second reading means;
Determining means for determining the size of the document;
Control means for controlling writing of the first image data and the second image data to the storage means and reading of the first image data and the second image data stored in the storage means;
The control means includes
The first image data is written from the first start position in the storage area of the storage means, and from the position behind the storage area corresponding to the document size determined by the determination means from the first start position in the storage area. Writing the second image data and writing the second image data from the first start position when the destination of the second image data reaches the rear end of the recording area;
After the first image data is written at the first start position, the written first image data is read after a predetermined time, and after the transfer of the first image data on the first surface is finished, the second image data document reading apparatus according to claim <br/> be read.

The document reading apparatus according to claim 1, wherein the reading speed is faster than the writing speed.

The control means includes
When the size of the document determined by the determining means is the first size, the first image data and the second image data are written in different storage areas,
When the document size determined by the determination unit is the second size, the first image data is written from the first start position in the storage area of the storage unit, and from the first start position in the storage area. Writing the second image data from a position behind the storage area corresponding to the size of the document determined by the determining means;
When the size of the document is the first size, the data amount of the recording area of the storage means is the data amount of the first image data on the first surface and the second image data on the second surface. Greater than the total amount of data,
When the size of the original is the second size, the data amount of the recording area of the storage means is the data amount of the first image data on the first surface and the second image data on the second surface. Less than the total amount of data
The document reading apparatus according to claim 1 or 2, wherein