JPH07109611B2 - Hand scanner type image input device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand scanner type image input apparatus for optically reading a handwritten character, figure, etc. printed on a document.

2. Description of the Related Art In recent years, the image processing technology has made remarkable progress in the consumer electronics industry, and in particular, a hand scanner type image input device that can obtain image information by a simple operation has been emphasized.

The hand scanner type image input device is easy to operate, but it is difficult to obtain an accurate image due to the influence of the inclination of the scanning direction, and the mutual positional relationship is adjusted especially when a wide range of images are divided and read. Was difficult. Several ideas have been made in the past to solve this.

A conventional hand scanner type image input device will be described below with reference to the drawings.

FIG. 6 shows the configuration of a conventional hand scanner type image input device. In FIG. 6, 71 is a hand scanner, 72
Is a tablet and 73 is a processing device.

A detection device for detecting the position on the tablet 72 is incorporated in the hand scanner 71, and by giving position information on the tablet 72 to image information obtained by scanning the hand scanner 71, The distortion of image information is corrected (for example, Japanese Patent Laid-Open No. Sho 58-76982).

FIG. 7 shows the structure of another conventional hand 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 is scanned along the guide frame 82 to obtain the image information on the document and at the same time to detect the timing mark 83 to obtain the scanning speed information, and the scanning speed information corrects the distortion of the image information. (For example, Japanese Patent Laid-Open No. 58-
99885 publication).

Problems to be Solved by the Invention However, in the above-described configuration, a complicated auxiliary device such as a tablet is required in addition to the hand scanner at the time of image input, and a limited operation of scanning along a guide frame is required. However, there is a problem in that the characteristics of the hand scanner itself are impaired, which is a great advantage that the operation is originally simple.

The present invention has been made in view of the above problems, and does not require a complicated auxiliary device other than a hand scanner at the time of image input, has no restriction on the inclination of scanning, and can perform accurate image input, and a large-sized original document. The present invention provides a hand scanner type image input device capable of inputting images.

Means for Solving Problems A hand scanner type image input device of the present invention is a light transmission type sheet which is placed on an original in an overlapped manner and at least a part of which has positional information written therein, and the light transmission type sheet. A reading unit that scans the top to read the image information on the document and the position information of the light transmission type sheet, a first storage unit that temporarily stores the image information obtained by the reading unit, and this image. Detection means for detecting the position information recorded on the light-transmissive sheet from the information, calculation means for calculating the output of the detection means, and an image stored in the first storage means with the output of the calculation means as an input. It is composed of conversion means for converting information and storing it in the second storage means.

Operation With this configuration, as the auxiliary device necessary for image input, only the light transmission type sheet is necessary, and the inclination of scanning is not restricted. It is also possible to read a large-sized original.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing a state at the time of image input of the hand scanner type image input device in one embodiment of the present invention.
In FIG. 2, 1 is a manuscript on which characters or figures are printed or handwritten, and 2 is a light-transmissive sheet 3 in which position information is recorded in the form of a bar code on both ends of a transparent sheet to obtain image information. A hand scanner 4 with a built-in sensor is a processing device for processing image information.

Further, FIG. 3 is a view of the light transmissive sheet 2 as viewed from above. In FIG. 3, parts (a) and (b) are opaque, and position information in the y direction is printed in the form of a bar code. The part (c) is transparent, and the document 1 is placed under the part (c).

FIG. 1 is a block diagram of the inside of the processing device 4 in FIG. In FIG. 1, 1,2,3,4 are shown in FIG.
It is the same as the document 1, the light-transmitting sheet 2, the hand scanner 3, and the processing device 4 shown in the figure. Reference numeral 41 designates an output from the hand scanner 3 as an input, and a first storage section 42 for storing image information of the original 1 and the light transmission type sheet 2, and 42 a light transmission from the image information stored in the first storage section 41. A detection unit that detects the position information recorded on the mold sheet 2, 43 is an arithmetic unit that receives the output of the detection unit 42, and 44 is the arithmetic unit 43 that uses the image information of the first storage unit 41 as the first input. Is a second input section, and 45 is a second storage section which receives the output of the conversion section 44 as an input.

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

First, the light transmissive sheet 2 is overlaid on the original 1. Next, the hand scanner 3 is pressed against the light transmissive sheet 2 for scanning. A roller is provided in a portion where the hand scanner 3 comes into contact with the light transmissive sheet 2, so that blurring in the scanning direction does not occur. The image information on the original 1 and the position information on the light transmissive sheet 2 are read by a sensor built in 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 FIG. 4 (A),
When the hand scanner 3 scans the original 1 and the light transmission type sheet 2 as indicated by the arrow X, the image information as shown in FIG. 4 (B) can be read. This image information is sent to the first storage unit 41 and temporarily stored. The detection unit 42 starts from the image information portions 51 and 52 of FIG. 4 (B), which are a part of the image information stored in the first storage unit 41, that is, both end portions of the light transmission type sheet 2, the third portion. The position information is detected from the parts corresponding to parts (a) and (b) of the figure. The position information detected from the image information portion 51 of FIG.
If the position information detected from P2 is P2 and the original interval where the position information is recorded on the light transmissive sheet 2 is l, the tilt angle θ scanned by the hand scanner 3 can be obtained by the equation (1).

The calculation unit 43 receives the position information detected by the detection unit 42 as an input, calculates the formula (1), and outputs the scanning tilt angle θ as a correction coefficient. The conversion unit 45 receives the correction coefficient scanning inclination angle θ output from the calculation unit 43 as an input, and receives the first storage unit 41.
A conversion operation of inclining the image information of (1) by an angle θ is performed, and the image information having the inclination is output to the second storage unit 45.

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

Further, by measuring the distance between the position information P1 and P2, the distortion in the scanning direction can be corrected. The distance between P1 and P2 is l2
Then, the calculation unit 43 obtains l2 / l, and outputs the result to the conversion unit 45 as a second correction coefficient. The conversion unit 45 expands and compresses the image information in the first storage unit 41 in the scanning direction by using the second correction coefficient, and corrects the distortion.

As described above, according to the present embodiment, at the time of image input, by using a simple auxiliary device that is a light-transmissive sheet with positional information recorded at both ends, accurate image input can be performed by a simple operation. In addition, a large document can be input with a small sensor.

Advantageous Effects of Invention The present invention, when an image is input, a light transmission type sheet, a detection unit that reads image information using a hand scanner, and detects position information from this image information, and a correction from the position information detected by the detection unit. By providing a processing device having a calculating means for calculating the coefficient and a converting means for converting the image information by the correction coefficient obtained by the calculation, (i) a special manuscript with a position identification mark or the like as an input manuscript Paper is not required and ordinary printed matter can be used as an input document. (Ii) It is possible to select and use an optimal light-transmissive sheet according to the characteristics of the input document (color tone or image fineness), and it is possible to input an image with higher accuracy. (Iii) No complicated auxiliary device is required for image input. (Iv) Accurate image input is possible with a simple operation. (V) A large document image can be input even with a small sensor. It is possible to realize an excellent hand scanner type image input device that can obtain the effect.

[Brief description of drawings]

FIG. 1 is a block diagram of a hand scanner type image input device in one embodiment of the present invention, FIG. 2 is a perspective view showing a state of the same device during image input, and FIG. 3 is a top view of a light transmission type sheet, FIG. 4 is a conceptual diagram of the read image information, FIG. 5 is a conceptual diagram of the image information to be stored, and FIGS. 6 and 7 are perspective views showing a configuration of a conventional example. 1 ... manuscript, 2 ... light transmissive sheet, 3 ... hand scanner, 4 ... processing device, 41 ... first storage section, 42 ... detection section, 43 ... calculation section, 44 ... conversion Part, 45 ... Second storage part.

Claims (3)

[Claims] 1. A light-transmitting sheet, which is placed on an original document and has opaquely recorded position information groups coded for position identification at both ends thereof, and the light-transmitting sheet is scanned.
A reading unit having a built-in sensor for reading the image information of the original document and the position information group recorded on the light transmission type sheet; and a first storage unit for temporarily storing the image information obtained by the reading unit, From this image information, detecting means for detecting position information at both ends from the position information group recorded on the light-transmitting sheet, one by one, and position information at both ends detected by this detecting means are calculated to obtain an inclination correction coefficient. The output means, the conversion means for correcting the inclination of the image information stored in the first storage means by the inclination correction coefficient, and the image information converted by the conversion means correspond to the position information of the both ends. And a second storage means for sequentially storing at a position on the storage means. 2. A hand scanner type image input device according to claim 1, wherein the reading means is provided with a roller which rotates in one direction at a contact portion with the light transmission type sheet. 3. The calculation means is obtained from position information of both ends,
The first correction coefficient for correcting the inclination and the second correction coefficient for correcting the distortion in the longitudinal direction, which is obtained from the scanning time of the reading unit, are output, and the conversion unit outputs the first correction coefficient and the first correction coefficient. 4. The hand scanner type image input device according to claim 3, wherein the image information stored in the first storage means is corrected by the correction coefficient of 2.