TW563336B - Method for optimized automatic focusing of image scanning device - Google Patents

Abstract

The present invention provides a method for optimized automatic focusing of image scanning device, which comprises, during scanning of the to-be-scanned manuscript, first driving the optical module of the scanning device to move to the position of starting scanning line of the to-be-scanned manuscript upon the manuscript loading surface; then, driving the optical module right at the position of the best focus value of the scanning line; after the scanning mechanism stops shaking, using the optical module for exposure scanning on the scanning lines for the to-be-scanned manuscript; repeating the above steps to scan each scanning line one by one on the to-be-scanned manuscript for scanning until the last scanning line. The best focus value is obtained by executing a pre-scanning procedure to determine the best focus value for each scanning line of the scanner, and to store the values in the memory of best focus value.

Description

^ 3336 V. Description of the invention (1) Detailed description ... 1. Field of the invention The present invention relates to a method of scanning and focusing, which is a method of scanning and focusing, especially the image scanning quality. Autofocus method to get Z · Background description: The scanner has been widely used due to the advancement of scanning technology and its scanning acquisition and storage. The scanning resolution is getting higher and higher. Due to uy's needs, scanning becomes an important issue. The quality of image scanning during scanning operations is determined by: such as the nature of the scanned document itself. Many factors, such as the precision of the design, the mechanism between the components = the mechanism of the two sensors, the vibration of the use environment, etc .: this: sound: the vibration of the body itself will affect the final image scan The quality of the image. Separately or collectively-it shows a typical reflective image scanner and it shows a scanner housing! The private image is defined in the scan, and it is presented in this scan. The rectangular scanning window is embedded with a surface 11 in the middle of the frame, and the top surface of the bean can be used to carry a manuscript made of bamboo ^? Eight for a reflective manuscript 12 to be scanned. A displaceable optical module 2 is arranged at the bottom of the bearing surface 11 of the handle 1. The learner group 2 can be driven along with the conventional optical module driving mechanism 3 and the control unit 4 and driven by the conventional optical module. Guide (not shown) in the first direction! And proceed = displacement to place Shu document to be scanned on the document supporting surface Shushu 2 scavenged

Page 4 563336 V. Description of the invention (2) A light source 2, a plurality of reflective lenses 22, 23, 24, 25, a focusing lens 26, and an image sensing element 27 (for example, Charge Coupled Element (CCD) and other components. The scanning light source 211 projected by the light source 21 is reflected by the bottom surface of the manuscript 12 and is reflected in the design of the scanner through each of the mirrors. 'Using a single-scanning focal length of Li, it is often flattened by the manuscript Degree, structure; precision of the plan, the cooperative relationship between the various components, the vibration factor of the body itself can not achieve the best confrontation effect, the brother's vibration ... and other factors to achieve the best results. If the quality of the image obtained by the tracing cannot be used to overcome the aforementioned problems, in the technical imagery using autofocus, the scanners of the industry ca n’t overcome the problems such as the wear of the autofocus function, so it is still a helmet. It is necessary to cover the body vibration, mechanism components, and image scanning. When scanning the image, the optical and in-sensor of the scanner must be scanned and aligned. The shadow of the group: the relative distance of the image obtained by scanning. The summary of the present invention. Second, in view of the fact that ... the scan is missing, the 5th page is 563336. 5. Description of the invention (3) Optimization of the product Demand, the optimized autofocusing method of the main image suppression device of the present invention is to be provided only for 2 years-the kind of image can be protected from the scanning quality of the image of the image scanning device itself. The scanner machine made in a long time, another object of the present invention is to provide one; '乂 first learn the module displacement, wait for the body to stop shaking 暾 :: scan lines one by one-to complete the image scanning of the entire scanning surface, to ensure that the steps of the two f know the image' image quality. To ensure that the scanning of the positive scanning surface achieves the above-mentioned object of the present invention, the optical module in the preferred embodiment of scanning the document to be scanned is moved to the document bearing surface: two f drive the scanning device Line position, and then drive the position of the initial scanning distance of the optical module manuscript, and wait for this; the best focus module of the two scanning lines will shake the scanning line where the manuscript to be scanned shakes, and then use the light to describe the steps After that, you can scan one by one. Repeat the previous description until the final scan line. ^ Best ^ Pre-scanning procedure is performed for each scanning line to obtain the most focal length value. The value is executed and can be stored in :::::; In the focus of the line focus, according to the reading of the huge value, it will be used as a follow-up to this Mao Ming's other purposes and examples of surname μ and attached drawings. The intention will be explained by the following implementation of the preferred embodiment. · Page 6 563336

Refer to Figure 2-^ ^ Dan you show the endless invention of the optical path diagram. Nong 4 Γ: ί and ί; the arrangement between the pieces is the same as the conventional image scan shown in Figure-Prophet: Think the same picture, so the same components are marked with the same same spoon ΐ Ξ f. That is, the image scanning device shown in FIG. 2; the bearing surface 11, the optical module 2, the optical module driver includes components such as the right one stop early 704, and the same inside the optical module 2 ^ The light source 21, a plurality of reflective lenses 22, 23, 24, 25, a gathering spot, every 2: 1, and an image sensing element 27. The optical module 2 is in the optical mode ': and: control and drive of the zone moving mechanism 3 and the control unit 4

== Horizontal displacement in the 1st direction to place =. The manuscripts to be scanned 12 on the table surface 1 1 are scanned. In the embodiment of the present invention, a focusing drive mechanism 5 is further included, which is controlled by ϋ χ to the control unit 4 to cause the optical module 2 to be displaced in the second direction 19 (that is, “up and down direction”) to adjust the optical The relative focusing distance between module 2 to be scanned. Those skilled in the art should understand that, in order to pay the focus value, in addition to moving the optical module 2 and the manuscript 12 to be scanned, The focus lens 26 or the image sensing element can also be moved. The relative displacement distance can also achieve the purpose of adjusting the focus. The control: t14 is also equipped with an optimal focus value memory 6 to store each scan.

Two Lin, one or more groups of the best focal length value. Of course, at this optimal focal length value, the thinking body 6 can also store the optimal focal length value of the scanning line of a predetermined number of intervals. Figure 1 and Figure 2 show the control flow chart of the present invention. · Please refer to FIG. 2 and FIG. 2 at the same time, to explain the optimized focusing method of the present invention. First, the furnace control process first executes a pre-scanning procedure for the optimal focal length value (steps 丨 〇 丨).

Page 7 563336 V. Description of the invention (5) To obtain the optimal focal length value using the manuscript bearing surface as the beauty. The specific method "can drop 2: a group of quasi-focusing whiskers with one scanning line (for example, a black-and-white phase 3 ~ optical module 2 scans a standard scan '## to standard focus 1') to test values. The optimal focal length of the mother-scanning line. The fourth line shows the scanning lines (U, L optimal focal length value pre-scanning range ⑺ ...) obtained after the sequence of the previous step 101, and the relationship curve is given by the number L (SCan Line Numbers), ¥ axis 1 represents Zhizhi

Focus V fine), the corresponding G = J distance Qing ... the best focus distance database for the control unit distance value of the scanner = 6 can store one or more sets of the best focus distance database: # "1 \ of \ document scanning" is driven by the optical module drive mechanism 3, and 2 in the first direction 丨 moved to the document bearing surface〗 丨 the first scan line L1 of the document to be submitted 12 (Ie, the starting scanning line N = 1) (step * 102). Then, the control unit 4 takes the optimal focal length value η of the first scanning line L1 stored in advance from the optimal focal length value memory 6, And control the focus driving mechanism 5 to drive the optical module 2 to be displaced in the second direction, and adjust the relative distance between the optical module 2 corresponding to the manuscript to be scanned, which is exactly at the scanning line L1. The position of the optimal focal length value F1 (step 103). ° Then, wait for a predetermined time Q) to stop the scanner mechanism from shaking (step 104), and then the optical module 2 locates the manuscript 12 to be scanned. Scan page 8. V. Description of the invention (6) Draw the line (this is the first waiting line for the scanner machine). Exposure scanning (step 105). In the step of shaking before the design of the front scanner machine, for example, it can be based on the allowable vibration of the scan; 疋, the duration of the machine vibration, or the measurement is completed The aforementioned t: determine the predetermined time to wait ⑴. After judging whether the exposure scan of Erda Line has been completed, increase n = n + i in step 106 (step 107 彳 ▼ scanning of the line. If not, Then the number of scan lines is used to scan the manuscript to be scanned, step by step. In step m, the second scan of the entire surface of the manuscript can be changed to other recursive values (for example, the increasing value of the number of m is 1 ' Of course, in step 106, if it is judged that e + poster has completed the scanning of the optimized automatic two scanning lines of the present invention, the image is traced out and the right method is removed. The scan obtained at this time ~ The image has optimized image quality. Tuning = narrative!;: Optimization of the provided image scanning and insertion device or machine: This problem is caused by the problem of the body ’s vibration image [] Definitely high; scan images to limit the invention *, so those who are good at this description and the patent scope defined below In. And spirit of the present invention to

563336 Brief description of the drawings (1) Brief description of the drawings: Figure 1 is a schematic diagram showing the optical path of a conventional image scanning device; Figure 2 is a schematic diagram showing the optical path of the image scanning device of the present invention; Figure 3 is a control process of the present invention. Figure; Figure 4 is a graph showing the relationship between the optimal focal length of each scan line obtained after the pre-scanning procedure of the optimal focal length. (2) Explanation of drawing number:

1 Scanner housing 11 Manuscript carrying surface 12 Manuscript to be scanned 2 Optical module 21 Light source 211 Scan light source 22 ^ 23 > 24 > 25 Reflective lens 26 Focus lens 27 Image sensing element 3 Optical module driving mechanism 4 Control unit 5 Focusing drive mechanism 6 Optimum focus value memory 7 Optimum focus value curve 第 ίο

Claims (1)

" 、 Scope of patent application 1 · -A kind of image scanning and inserting 'Optimized auto-focusing method deployed in the scanner mechanism is based on an imaging system unit and an optical module—the optical module can be used in一 # Placed under the control of the image; == displacement, 4 scans, the first learning grip ^ $ The manuscript to be scanned on the manuscript bearing surface is aligned corresponding to the waiting ^ ^ driven by a focusing drive mechanism Lower the following steps: The focus position of the tracing manuscript, the focusing method includes (a) driving the optical module to move to the starting scan line position; the manuscript to be scanned on the β-eighth surface (b) driving the umbrella position ; "And the optimal focal length of the scan line where it is located (C) waiting for the scanner mechanism to stop (d) scanning the scanned document with the optical module ^ scanning; exposure of the known trace line (e) repeat Describe the steps a to d, and scan the lines one by one or at predetermined intervals. Each line of the manuscript should be traced until the final scan is finished. Coke method, wherein step a still includes ^ jf 之Optimize the automatic adjustment procedure to obtain a group of optimal focal length values based on the pre-scanning of one line with the optimal focal length value of the manuscript surface of the manuscript. Xiang Zhitian's optimization of automatic adjustment of the image --------- $ 11 pages N'A patent range = f method, where the pre-scanning procedure of the optimal focal length value is to have black and white phase Standard focus test of the pattern :: Optical module :: To obtain the standard focus test sheet for each scan line scan focus distance 1 Patent method No. 2 image scanning device ", method, where the optimal focus value is stored Optimized auto-tuning :: In the memory of the optimal focal length value, Γΐ!;: ;; f scanning device control unit to access it. The image scanning device controlled by the item 4 of the control range of the ° H-shirt image scanning device: = method, where the optimal focal length value is recorded as the optimal focal length value for automatic adjustment. The optimized automatic focusing method for storing at least-groups of devices in the dagger and the body. In the structure, an optical module is arranged in the structure, which is an image = and the driving mechanism of the optical module = the group can be controlled in one , Placed under the image scanning device ^ for displacement ′ to trace ^, the optical module can also be carried out by ^ 's manuscript to be scanned; corresponding to the week of the manuscript to be scanned = mechanism driven down :: The best pre-stored focal length value: max =, the control unit is connected with ",, the method includes the following steps ...", distance value memory, the (a) drives the optical module to move to the original scanning line position ; Manuscript to be scanned on the surface 563336 patent application scope_ (b) the control unit memorizes the optimal focal length value of the optimal focal length value;% out of the scanning line (c) drives the The position of the optimal focal length value of the scanning line where the light is located is $, and is exactly (d) waiting for the scanner mechanism to stop shaking;, (e) scanning the scanned document with the optical module; Ho & Line exposure, repeat the previous steps , Scan lines or predetermined intervals 浐 > Green = wait for each trace of the trace. You know, until the final image focusing method such as the 6th in the scope of patent application, the establishment of the optimal focus value field and the optimized automatic adjustment value is established by the optical module pair: A good focal length quasi-focus test piece was tested for scanning. 'Yes, the best focal length of each scan line on the bearing surface of the manuscript =. In order to obtain the standard focus test piece, the focus method of item 6 of the patent application range, wherein the optimal focal length is the optimal focal length value of the automatic optimization. 5 has been stored in the body at least-more than