Unlock instant, AI-driven research and patent intelligence for your innovation.

Compensation apparatus for image scan

a technology of compensating apparatus and image, applied in the direction of electrical apparatus, pictoral communication, etc., can solve the problems of deteriorating image quality, vibration affecting scanning quality, etc., and achieve the effect of improving image quality

Inactive Publication Date: 2006-12-28
TRANSPACIFIC SYST
View PDF12 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention provides a compensation apparatus for image scan in an optical scanner. The apparatus can compensate for optical path deviation in the x, y, and z-axis directions to improve image quality. It includes calibration boards and calibration photosensitive devices to detect and correct the calibrated image for optical path deviation. The image processor calculates the optical path deviation based on the calibration image and the pattern proportion and displacement detected by the calibration photosensitive devices. The apparatus can correct the scanned image for optical path deviation in the y- and z-axis directions."

Problems solved by technology

When the driving system operates to drive the lens or the charge coupled device, vibration occurs that affects the scanning quality.
A chromatic aberration occurs to the scanned image, such that the image quality is deteriorated.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Compensation apparatus for image scan
  • Compensation apparatus for image scan
  • Compensation apparatus for image scan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018]FIG. 2 shows an embodiment of a compensation apparatus for image scan of an optical scanner. FIG. 3 shows the optical path of FIG. 2 (the planar mirror is omitted), and FIG. 4 shows the photosensitive apparatus of the compensation apparatus.

[0019] In FIG. 2, the compensation apparatus is installed in an optical scanner. The optical scanner has a light source (not shown), a platform 202 for locating an object-to-be-scanned 200, a photosensitive apparatus 210 which includes a set of scan photosensitive devices R, G, B 210a, 210b, 210c (as shown in FIG. 4) and a storage apparatus (not shown). The scanning direction is referred to as the y-axis, the direction along the platform 202 and vertical to the y-axis is referred to as the x-axis. Using the right hand rule, a z-axis vertically coming out of the platform 202 can be obtained.

[0020] When the optical scanner is scanning, a driving system (not shown) drives the optical system 211 (that is, the set of planar mirrors 204, the le...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A compensation apparatus for image scan, applied to an optical scanner with a platform, on which an object to be scanned is disposed. The optical scanner has a photosensitive apparatus with a set of scan photosensitive devices and a storage apparatus. When the object is scanned by the set of scan photosensitive devices, a scanned image is obtained and saved in the storage apparatus temporarily. The compensation apparatus has a set of calibration boards, a set of calibration photosensitive devices and an image processor. The set of calibration boards has two calibration boards located at two sides of the platform. The set of calibration photosensitive devices is located at two sides of the set of scan photosensitive device. The image processor is used to extract and compare the calibrated image, so as to adjust the scanned image.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The invention relates in general to a compensation apparatus for image scan, and more particularly, to an apparatus for compensating the optical path deviation caused by vibration of an optical scanner. [0003] 2. Description of the Related Art [0004] As use has increased and with breakthroughs in the technology of photosensitive devices, the resolution of optical scanners has steadily increased from the early 200 dots per inch (dpi) for a black-and-white scan and gray scale scan to 300 dpi, 600 dpi, 1000 dpi, and now 2000 dpi and 4000 dpi for a color scan today. As the resolution is continuously enhanced, the scanner becomes more and more sensitive to the machine's vibration. [0005] In a typical optical scanner, after first being projected onto an object to be scanned and then reflected by the object to a series of planar mirrors, a light source is subsequently projected onto a charge coupled device (CCD) to be conv...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): H04N1/04H04N1/047H04N1/10H04N1/193
CPCH04N1/0473H04N1/1017H04N1/193H04N2201/0402H04N2201/04787H04N2201/04793H04N2201/02439H04N2201/04794H04N2201/04713H04N2201/0472H04N2201/04743H04N2201/04749
Inventor HUANG, CHIH-WENCHEN, CHENG-KUEITSENG, JEN-SHOU
Owner TRANSPACIFIC SYST