JPS6261182A - Hand scanner type image input device - Google Patents

Abstract

PURPOSE:To attain precise image input with simple operation by reading out image information by a light transmissible sheet and a hand scanner and converting the image information on the basis of a correcting factor obtained by the operation of positional information detected from the image information. CONSTITUTION:The image information on an original 1 and the positional information on the light transmissible sheet 2 are read out by a sensor built in the hand scanner 3 and sent to a processor 4. A detecting part 42 detects the positional information from image information parts 51, 52 which are a part of the image information stored in the 1st storage part 41. An arithmetic part 43 inputs the positional information detected by the detecting part 42, executes the calculation of the input and then outputs the angle theta of a scanning inclination as a correcting factor. A conversion part 45 inputs the angle theta, executes the converting operation for inclining the image information of the 1st storage part 41 by the angle theta and outputs the inclined value to the 2nd storage part 45. Thus, the image information inputted by inclined scanning can be restored to the original image information.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hand scanner type image input device for optically reading characters, figures, etc. printed or handwritten on a document.

BACKGROUND OF THE INVENTION In recent years, image processing technology has made a remarkable advance into the consumer electronics industry, and in particular, scanner-type image input devices, which can obtain image information with simple operations, have become important.

Although hand scanner type image input devices are easy to operate, it is difficult to obtain accurate images due to the influence of the tilt of the scanning direction, etc. Also, especially when reading a wide range of images by dividing them, it is difficult to adjust the mutual positional relationship. It was difficult. Several attempts have been made in the past to solve this problem.

Hereinafter, a conventional scanner type image input device will be explained with reference to the drawings.

FIG. 6 shows the configuration of a conventional scanner type image input device. In FIG. 6, 1 is a hand scanner, 2 is a tablet, and 73 is a processing device.

The hand scanner 71 has a built-in detection device that detects the position on the tablet 72, and by giving the position information on the tablet 72 to the image information obtained by scanning the hand scanner 1, , corrects distortion of image information (for example, Japanese Patent Application Laid-Open No. 58-76982
Publication No.).

FIG. 7 shows the configuration of Ike's conventional scanner type image input device. In FIG. 7, 81 is a hand scanner, 82 is a guide frame, and 83 is a timing mark. The hand scanner 81 scans along the guide frame 82 to obtain image information on the document and at the same time scans the timing mark 8.
By detecting 3, scanning speed information is obtained, and distortion of image information is corrected using this scanning speed information (for example, Japanese Patent Laid-Open No. 58-99885).

Problems to be Solved by the Invention However, with the above configuration, when inputting images, a complicated auxiliary device such as a tablet is required in addition to a hand scanner, and a limited operation of scanning along a guide frame is required. This poses a problem in that the hand scanner itself has the disadvantage of being easily operated, which is a major advantage.

The present invention has been developed in view of the above-mentioned problems, and does not require any complicated auxiliary equipment other than a hand scanner when inputting images, has no restrictions on the scanning inclination, can perform accurate image input, and is suitable for large-sized originals. The present invention provides a hand scanner type image input device that can also input images.

Means for Solving the Problems The hand scanner type image input device of the present invention comprises a light-transmissive sheet placed over a document and on which position information is written on at least a part of the sheet, and the light-transmissive sheet. a reading device that scans the top of the document and reads image information on the document and position information of the light-transmissive sheet; a first storage device that temporarily stores the image information obtained by the reading device; a detection means for detecting position information recorded on the light-transmissive sheet from image information; a calculation means for calculating the output of the detection means; and a converting means for converting image information and storing it in a second storage means.

Function: With this configuration, the only auxiliary device required during image input is a light-transmitting sheet, and there are no restrictions on the scanning inclination. ! In addition, it is also possible to read large-sized originals.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing a state of the hand scanner type image input device in an embodiment of the present invention when inputting an image.

In Figure 2, 1 is a document with printed or handwritten characters, figures, etc. 2 is a transparent sheet with positional information recorded in the form of a barcode on both ends of the transparent sheet 3 is a transparent sheet for obtaining image information A hand scanner has a built-in sensor, and 4 is a processing device that processes image information.

Further, FIG. 3 is a view of the light-transmissive sheet 2 viewed from above. In FIG. 3, portions (2L) and (b) are opaque, and position information in the y direction is printed in the form of a barcode. Section (C) is transparent, and document 1 is placed under section fc).

FIG. 1 is an internal block diagram of the processing device 44 in FIG. 2. As shown in FIG. In Figure 1, 1, 2, 3°4 is the second
Manuscript 1 shown in Fig. 3. Light-transmissive sheet 2. Hand scanner 3. It is the same as the processing device 4. 41 is a first storage unit that receives the output from the hand scanner 3 and stores image information of the original 1 and the light-transmitting sheet 2; A detection section 43 detects the positional information recorded on the pattern sheet 2; a calculation section 43 receives the output of the detection section 42 as an input; The converting unit 45 receives the output of the converting unit 44 as its second input, and 45 is a second storage unit which receives the output of the converting unit 44 as its input.

The operation of the hand scanner type image input device configured as described above will be described below.

First, a light-transmissive sheet 2 is placed on a document 1. Next, the hand scanner 3 is pressed against the light-transmitting sheet 2 to scan it. A roller is provided at the portion where the hand scanner 3 contacts the light-transmissive sheet 2 to prevent blurring in the scanning direction. Image information on the original 1 and position information on the light-transmissive sheet 2 are read by a sensor built into the hand scanner 3 and sent to the processing device 4 .

FIG. 4 shows a conceptual diagram of image information read by the hand scanner 3. As shown in Figure 4(A),
When the hand scanner 3 is scanned over the original 1 and the light-transmissive sheet 2 in the direction indicated by the arrow x, image information as shown in FIG. 4 can be read. This image information is
The data is sent to the storage unit 41 and temporarily stored. The detection unit 42 is
From the image information portions 51 and 52 of FIG. 4(B), which are part of the image information stored in the first storage unit 41, that is, both end portions of the light-transmissive sheet 2, and (a) of FIG. ,(b)
Position information is detected from the part corresponding to the part. Figure 4 (B
) is detected from the image information portion 61 of Pl.

Assuming that the positional information detected from the image information portion 52 is P2° and the original interval at which positional information is recorded on the light-transmissive sheet 2 is 4, the tilt angle θ scanned by the hand scanner 3 can be found by equation (1). .

The calculation unit 43 receives the position information detected by the detection unit 42, performs calculation of equation (1), and outputs the scanning tilt angle θ as a correction coefficient. The conversion unit 45 inputs the correction coefficient scanning tilt angle θ output from the calculation unit 43, performs a conversion operation of tilting the image information in the first storage unit 41 by the angle θ, and converts the tilted image information into the first image information. 2 storage unit 45
Output to.

FIG. 5 shows a conceptual diagram of image information stored in the second storage unit 46. Image information input by tilted scanning as shown in FIGS. 4(A) and 4(B) is also restored to the original image information as shown in FIG. 5. By repeating this input several times, the image information of the original 1 is input into the second storage section 45.

Further, by measuring the interval between the position information P1 and P2, distortion in the scanning direction can be corrected.

If the interval between Pl and P2 is 12, the calculation unit 43 calculates e2/
The conversion unit 46 calculates e and uses this result as the second correction coefficient.
Output to. The conversion unit 45 expands and compresses the image information in the first storage unit 41 in the scanning direction using the second correction coefficient, thereby correcting distortion.

As described above, according to this embodiment, by using a simple auxiliary device such as a light-transmitting sheet with positional information recorded on both ends when inputting images, accurate image input can be performed with simple operations. , and even a small sensor can input a large document.

Effects of the Invention The present invention provides a detection means for reading image information using a light-transmissive sheet and a hand scanner when inputting an image, detecting position information from this image information, and correcting the position information from the position information detected by the detection means. By providing a processing device with a calculation means for calculating coefficients and a conversion means for converting image information using the correction coefficients obtained by the calculation, there is no need for complex auxiliary equipment when inputting images, and the operation is simple and accurate. Accordingly, it is possible to realize an excellent hand scanner type image input device that can input images of a large document even with a small sensor.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a hand scanner type image input device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the state of the device during image input, and FIG. 3 is a top view of a light-transmissive sheet. FIG. 4 is a conceptual diagram of the read image information, FIG. 6 is a conceptual diagram of the stored image information, and FIGS. 6 and 7 are perspective views showing the configuration of a conventional example. 1... Original, 2... Light-transmissive sheet, 3
...Hand scanner, 4...Processing device, 41...First storage section, 42...Detection section, 43...Computation section , 44...conversion section,
45...Second storage section. Name of agent: Patent attorney Toshio Nakao and 1 other person7
-11 manuscript 2-light-transmissive sheet 3-hand scanner 4-processing device 41-X1 storage section dry-detection section 6= calculation section 4-conversion section Fig. 1/-m-document 4-processing device No. Figure 3 Cb Figure 4 (A) Figure 5 Figure 6

Claims (4)

[Claims] (1) A light-transmissive sheet placed over a document and having positional information recorded on at least a part thereof, and scanned over the light-transmissive sheet to record image information of the document and the light-transmissive sheet. a reading means having a built-in sensor for reading the position information recorded on the sheet; a first storage means for temporarily storing the image information obtained by the reading means; and a first storage means for temporarily storing the image information obtained by the reading means; a detection means for detecting; a calculation means for calculating the position information detected by the detection means and outputting a correction coefficient; and a conversion means for converting the image information stored in the first storage means using the correction coefficient. , a second memory storing the image information converted by the converting means.
1. A hand scanner type image input device comprising: a storage means; (2) The light-transmitting sheet has positional information recorded on both ends thereof, and this positional information is recorded in the form of image information such as a barcode. The hand scanner type image input device described above. (3) The hand scanner type image input device according to claim 1, wherein the reading means is provided with a roller that rotates in one direction at a portion that comes into contact with the light-transmitting sheet. (4) The calculation means outputs a first correction coefficient obtained from the scanning direction of the reading means and a second correction coefficient obtained from the scanning time of the reading means. The hand scanner type image input device according to item 1.