JPH045764U

JPH045764U -

Info

Publication number: JPH045764U
Application number: JP4596190U
Authority: JP
Priority date: 1990-04-27
Filing date: 1990-04-27
Publication date: 1992-01-20

Description

[Brief explanation of the drawing]

第１図はこの考案の実施例である着脱式イメー
ジスキヤナの被写体検出装置、又はこの考案の別
の考案の実施例であるシートスルー式イメージス
キヤナの被写体検出装置の構造を示す概略図、第
２図は従来の被写体検出用センサを備えるイメー
ジスキヤナの基本構造を示す概略図、第３図は第
２図のイメージスキヤナの被写体検出用センサと
して使用する各種のセンサを示す斜視図である。図において、１……光源、２……イメージセン
サ、３……イメージスキヤナ部、４……ペーパー
フイーダ部、５……被写体、６……被写体検出用
センサ、６ａ……透過形フオトカプラ、６ｂ……
反射形フオトカプラ、６ｃ……メカニカルスイツ
チ、７……範囲部である。なお、図中、同一符
号は同一、又は相当部分を示す。 FIG. 1 is a schematic diagram showing the structure of an object detection device for a detachable image scanner that is an embodiment of this invention, or an object detection device for a sheet-through image scanner that is another embodiment of this invention; Fig. 2 is a schematic diagram showing the basic structure of an image scanner equipped with a conventional object detection sensor, and Fig. 3 is a perspective view showing various sensors used as the object detection sensor of the image scanner shown in Fig. 2. be. In the figure, 1... light source, 2... image sensor, 3... image scanner section, 4... paper feeder section, 5... subject, 6... subject detection sensor, 6a... transmission type photocoupler, 6b... …
Reflective photocoupler, 6c... mechanical switch, 7... range section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims

[Claims for Utility Model Registration] 1. An image that has a light source and an image sensor that receives the light emitted from the light source and outputs a corresponding output by receiving the reflected light from the surface of the subject, and can be used as a handy type. In an image scanner equipped with a paper feeder section that incorporates this image scanner section and can also be used as a sheet-through type, before the object is conveyed to a certain area facing the image sensor. The image data read by the image sensor from the range part is compared with the image data read from the subject that is present on the range part when the subject is transported to the range part, and the comparison result is obtained. 1. A subject detection device for an image scanner, comprising: a subject presence/absence detection unit that determines the presence or absence of the subject based on differences in image data. 2. In an image scanner that has a light source, an image sensor that receives reflected light from the light source and outputs a corresponding output by receiving reflected light from the surface of the object, and has a drive mechanism for transporting the object, The image data read by the image sensor from the range before the object is transported to the range facing the image sensor, and the image sensor is present on the range. A subject detection device for an image scanner, comprising a subject presence/absence detection unit that compares image data read from the subject and determines the presence or absence of the subject based on a difference in the image data as a result of the comparison. .