Large Format Scanners and Scanning Methods

Abstract

The invention discloses a large-breadth scanner, comprising a scanning head (3) and a transmission mechanism (4); an image sensor (2) is mounted in the scanning head (3) which is connected with the transmission mechanism (4); the scanning head (3) is driven to move by the transmission mechanism (4); the scanning head (3) moves relative to an original (1) respectively in X direction and Y direction, and provides segmental image scanning for the original (1) through the image sensor (2). The combined segmental scanning scheme is adopted, the scanning breadth of the image sensor is basically irrelevant to the breadth of the original, it is possible to originals of various breadths flexibly, particularly a special original with very large breadth, and the limitation is overcome that the scanning view breadth of an image sensor in the prior art needs to correspond to the breadth of an original.

Description

technical field [0001] The present invention relates to a large-format scanner, in particular to a technical scheme of combined segmental scanning, which reduces the manufacturing cost of the large-format scanner, improves the scanning quality and application range of the large-format scanner, and belongs to the manufacture and application of large-format scanners. The technical field of scanning image stitching and processing. Background technique [0002] The scanning method adopted by existing large-format scanners is similar to the design idea of ​​small and medium-sized scanners, that is, a scanning head including an image sensor is set along the X direction, and the scanning head moves along the Y direction relative to the original, and the image sensor moves along the Y direction. The original image data is collected sequentially and spliced ​​to form a complete original image. For example, flatbed / flatbed scanners adopt the mode of fixed original moving scanning hea...

AI Technical Summary

Problems solved by technology

[0006] 2. Image sensor: Large-format scanners usually use multiple image sensors to collect image data in parallel and synchronously (such as CIS contact image sensors), and then splicing the image data collected by multiple image sensors through the overlapping area of ​​scanning; Image sensors are collected (such as high-precision CCD or CMOS image sensors). At this time, the cost of the image sensor is relatively high, and high-precision lenses need to be matched. When designing the optical circuit, it is necessary to use a large space or use a more complex The optical path structure has the advantage of reducing the image stitching process and high image quality, but the disadvantage is that it is large in size and high in cost; while most small and medium-sized scanners use a single image sensor acquisition mode, the technology is mature, stable and reliable;

[0008] 4. Manufacturing cost: The format of originals varies for different applications, and most of the existing scanners are designed and developed for a fixed format. Large-format scanners are used in a small amount and have many specifications, so compatibility and scalability However, the small and medium-sized scanners have uniform specifications, and the image sensors and scanning head frames used have formed a complete product line with low cost.

[0009] It can be seen that if the design idea of ​​small and medium-sized scanners is used to design large-format scanners, it is difficult to balance the use effect and cost

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