JP2018191094A - Document reader, method of controlling document reader, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a document reader that presents how to properly press a document to a user so as to avoid a situation in which the document is read with an edge of the document hidden behind a hand or fingers of the user.SOLUTION: A flotation region detection part of a camera scanner is configured to: acquires a distance image of a region where a document is mounted using a distance image acquisition part S500; detect a flotation region of the document placed on a document platen based upon the acquired distance image, S501; specify a kind of flotation of the document for each detected flotation region S503, S509-S515; and project by a projector how to press the document according to the kind of flotation of the document so as to correct the flotation of the document S504-S507.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a technique for reading a document with a camera scanner or the like.

  2. Description of the Related Art Conventionally, there has been known a flat bed type reading device that reads a sheet of paper (hereinafter referred to as “original”) such as A4 paper placed on a document table or a book. When reading a spread page of a book with a flatbed reader, the area near the binding area of the book rises from the document table, and in the scanned image data, the image near the binding area becomes dark, distorted, or blurred. Image data with sufficient quality may not be obtained. In order to prevent this, it is conceivable that the user scans the book while directly pressing it with the hand.

  In patent document 1, in order that a user grasps | ascertains how to hold down a book appropriately, the technique which presents the direction which the book floats with respect to the document stage is examined.

  In addition to the above-described flatbed type reader, a stand type scanner (camera scanner) is also known. The stand-type scanner is a reading device that places a document on a document table upward, captures an image with a camera disposed above the document table, and scans the document. Unlike the flat-bed scanner, the stand-type scanner is easily affected by an operator's shadow, illumination, and the like. Therefore, only the page area of a document or a book can be cut out by using an edge-based four-side detection method.

  When reading a document with a stand type scanner, the document cannot be pressed with a pressure plate. Therefore, in the stand type scanner, unlike the flat bed type, not only books but also originals may be lifted. In order to prevent this, it is conceivable that the user scans a place where the document is lifted (for example, a side or corner of the document) with a hand or a finger.

JP 2012-160896 A

In the above-described stand type scanner, the four sides of the document are cut out by the edge-based four-side detection method at the time of scanning. It is necessary to hold on.
However, according to the conventional technology, it is not possible to present the user with the position of the float in the document and an appropriate pressing method for the float. Therefore, when reading a document with a stand-type scanner, the document edge may be read with the user's hand or finger hidden.

  The present invention has been made to solve the above problems. An object of the present invention is to provide a user with an appropriate way to hold down a document and to prevent occurrence of a situation in which the edge of the document is read with the user's hand or finger hidden. Is to provide.

  The present invention provides a document reading apparatus that reads image data from a document to be placed, and obtains distance information of a region where the document is placed, and distance information obtained by the obtaining unit. Based on detection means for detecting a floating area of the document placed on the area, identification means for specifying the type of floating of the original document for each floating area detected by the detection means, and floating of the original document Presenting means for presenting how to hold down the original for correcting the floating of the original according to the type.

  According to the present invention, it is possible to present a user with an appropriate method of holding down a document. As a result, it is possible to suppress the occurrence of a situation in which the edge of the document is read while being hidden by the user's hand or finger.

Network configuration diagram including the camera scanner of this embodiment The figure explaining the structure of the camera scanner of a present Example Hardware configuration diagram of the controller unit of the camera scanner of this embodiment Software configuration diagram of the camera scanner of this embodiment Flow chart of floating area detection processing of embodiment 1 Diagram for explaining floating area detection processing Diagram for explaining the process of specifying the type of float Figure showing an example of how to hold down the document Flowchart of floating area detection process of embodiment 2 The figure explaining the process which gives a priority with respect to a floating area | region in Example 2. The figure for demonstrating the positional relationship of a camera scanner and a user Flowchart of floating area detection process of embodiment 3 The figure which shows the example of a display example of the holding method of the original with the angle | corner which floated in Example 1. The figure which shows the example of a display example of the holding method of the original with the angle | corner which floated in Example 1. The figure which shows the example of a display example of the holding method of the original with which the edge | side floated in Example 1. The figure which shows the example of a display example of how to hold | maintain the document which the center floated in Example 1. The figure which shows the example of a display example of how to hold | press the original with the angle | corner which floated in Example 3. The figure which shows the example of a display example of how to hold | press the original with the angle | corner which floated in Example 3. The figure which shows the example of a display of how to hold | press the document which the edge | side floated in Example 3 The figure which shows the example of a display example of the holding method of the original in which the center floated in Example 3.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an example of a network configuration including a stand type scanner showing an embodiment of a document reading apparatus of the present invention.
The camera scanner 101 is a stand type scanner according to the present embodiment. The camera scanner 101 is communicably connected to the host computer 102 and the printer 103 via a network 104 such as Ethernet (registered trademark).

  The camera scanner 101 can execute a scan function for reading an image from the camera scanner 101 and a print function for outputting scan data by the printer 103 according to an instruction from the host computer 102. Further, the camera scanner 101 can also execute a scan function and a print function according to a direct instruction to the camera scanner 101 without using the host computer 102.

<Configuration of camera scanner 101>
FIG. 2 is a diagram for explaining an example of the configuration of the camera scanner 101.
As shown in FIG. 2A, the camera scanner 101 includes a controller unit 201, a camera unit 202, an arm unit 203, a short focus projector 207, and a distance image sensor unit 208.

  A controller unit 201 that is a main body of the camera scanner, a camera unit 202 for performing imaging, a short focus projector 207, and a distance image sensor unit 208 are connected by an arm unit 203. The arm portion 203 can be bent and stretched using a joint.

  FIG. 2A also shows a document table 204 on which the camera scanner 101 is installed. The lenses of the camera unit 202 and the distance image sensor unit 208 of the camera scanner 101 are directed toward the document table 204. The camera scanner 101 can read an image in a reading area 205 surrounded by a broken line. In the example of FIG. 2, a document 206 is placed in the reading area 205. Therefore, the camera scanner 101 can read the document 206.

  A turntable 209 is provided in the document table 204. The turntable 209 can be rotated by an instruction from the controller unit 201. By rotating the turntable 209, the angle between the object placed on the turntable 209 and the camera unit 202 can be changed.

  The camera unit 202 may capture an image with a single resolution, but it is preferable that the camera unit 202 can capture a high-resolution image and a low-resolution image.

  Although not shown in FIG. 2, the camera scanner 101 may further include an LCD touch panel 330, a speaker 340, and a person detection RGB camera 360 as shown in FIG. The person detection RGB camera 360 is for detecting a person around the camera scanner 101.

FIG. 2B shows a coordinate system in the camera scanner 101.
In the camera scanner 101, coordinate systems of “camera coordinate system”, “distance image sensor coordinate system”, and “projector coordinate system” are defined for each hardware device. In these coordinate systems, an image plane captured by the RGB camera 363 of the camera unit 202 and the distance image sensor unit 208 or an image plane projected by the projector 207 is defined as an XY plane, and a direction orthogonal to the image plane is defined as a Z direction. Is.

  Furthermore, in this embodiment, an “orthogonal coordinate system” is defined so that the three-dimensional data of these independent coordinate systems can be handled uniformly. In the orthogonal coordinate system, a plane including the document table 204 is an XY plane, and a direction perpendicular to the XY plane is a Z axis.

Hereinafter, an example of converting the coordinate system will be described with reference to FIG.
FIG. 2C shows a relationship between a space expressed using an orthogonal coordinate system and a camera coordinate system and an image plane captured by the camera unit 202.
The three-dimensional point P [X, Y, Z] in the orthogonal coordinate system can be converted to the three-dimensional point Pc [X _c , Y _c , Z _c ] in the camera coordinate system by the equation (1).

  Here, Rc and tc are constituted by external parameters obtained by the posture (rotation) and position (translation) of the camera with respect to the orthogonal coordinate system, and Rc is called a 3 × 3 rotation matrix and tc is called a translation vector.

Conversely, the three-dimensional point Pc [X _c , Y _c , Z _c ] defined in the camera coordinate system is converted to the three-dimensional point P [X, Y, Z] in the orthogonal coordinate system by the equation (2). be able to

Further, the two-dimensional camera image plane photographed by the camera unit 202 is obtained by converting the three-dimensional information in the three-dimensional space into the two-dimensional information by the camera unit 202. In other words, the three-dimensional point Pc [X _c , Y _c , Z _c ] on the camera coordinate system is perspective-projected into the two-dimensional coordinate pc [x _p , y _p ] on the camera image plane according to equation (3). Can be converted.

  Here, A is a 3 × 3 matrix called an internal parameter of the camera and expressed by a focal length and an image center.

  As described above, by using the equations (1) and (3), the three-dimensional point group represented by the orthogonal coordinate system is converted into the three-dimensional point group coordinates or the camera image plane in the camera coordinate system. Can do. It is assumed that the internal parameters of each hardware device and the position / orientation (external parameters) with respect to the orthogonal coordinate system are calibrated in advance by a known calibration method. Hereinafter, when there is no particular notice and it is expressed as a three-dimensional point group, it represents three-dimensional data in an orthogonal coordinate system.

<Hardware Configuration of Controller 201 of Camera Scanner 101>
FIG. 3 is a diagram illustrating an example of a hardware configuration of the controller unit 201 which is the main body of the camera scanner 101. As illustrated in FIG.

  As illustrated in FIG. 3, the controller unit 201 includes a CPU 302, a RAM 303, a ROM 304, an HDD 305, and a network I / F 306 connected to a system bus 301. The controller unit 201 further includes an image processing processor 307, a camera I / F 308, a display controller 309, a serial I / F 310, an audio controller 311, and a USB controller 312.

  The CPU 302 is a central processing unit that controls the operation of the entire controller unit 201. The RAM 303 is a volatile memory. A ROM 304 is a nonvolatile memory, and stores a startup program for the CPU 302 and the like. The HDD 305 is a hard disk drive (HDD) that has a larger capacity than the RAM 303. The HDD 305 stores a control program for the camera scanner 101 executed by the controller unit 201.

  The CPU 302 executes a startup program stored in the ROM 304 when the power is turned on or the like. This activation program is for reading a control program stored in the HDD 305 and developing it on the RAM 303. When executing the startup program, the CPU 302 executes the control program developed on the RAM 303 and performs control. The CPU 302 also stores data used for the operation by the control program on the RAM 303 to read / write. The HDD 305 can further store various settings necessary for operation by the control program, image data generated by camera input, and the like. The HDD 305 can be read and written by the CPU 302. The CPU 302 communicates with other devices on the network 104 via the network I / F 306.

  The image processor 307 reads and processes the image data stored in the RAM 303 and writes it back to the RAM 303. Note that image processing executed by the image processor 307 includes rotation, scaling, color conversion, and the like.

  The camera I / F 308 is connected to the camera unit 202, the distance image sensor unit 208, and the person detection RGB camera 360. The camera I / F 308 acquires image data from the camera unit 202 or the person detection RGB camera 360 and distance image data (distance information) from the distance image sensor unit 208 in accordance with an instruction from the CPU 302, and writes it into the RAM 303. . The camera I / F 308 transmits a control command from the CPU 302 to the camera unit 202, the distance image sensor unit 208, and the person detection RGB camera 360, and the camera unit 202, the distance image sensor unit 208, and the person detection RGB camera. Set 360. The configuration of the distance image sensor unit 208 will be described later.

  The controller unit 201 includes at least one of a display controller 309, a serial I / F 310, an audio controller 311 and a USB controller 312.

  A display controller 309 controls display of image data on the display in accordance with an instruction from the CPU 302. Here, the display controller 309 is connected to the short focus projector 207 and the LCD touch panel 330, and controls these displays.

  The serial I / F 310 inputs and outputs serial signals. Here, the serial I / F 310 is connected to the turntable 209, and transmits to the turntable 209 instructions for the rotation start / end of the CPU 302 and the rotation angle. Further, the serial I / F 310 is connected to the LCD touch panel 330, and the CPU 302 acquires the coordinates pressed via the serial I / F 310 when the LCD touch panel 330 is pressed.

  The audio controller 311 is connected to the speaker 340, converts audio data into an analog audio signal in accordance with an instruction from the CPU 302, and outputs audio through the speaker 340.

  The USB controller 312 controls an external USB device in accordance with an instruction from the CPU 302. Here, the USB controller 312 is connected to an external memory 350 such as a USB memory or an SD card, and reads / writes data from / to the external memory 350.

<Functional configuration of control program for camera scanner 101>
FIG. 4 is a diagram illustrating an example of the functional configuration 401 of the control program for the camera scanner 101 executed by the CPU 302. The control program for the camera scanner 101 is stored in the HDD 305 as described above, and the CPU 302 develops and executes it on the RAM 303 at the time of activation. That is, the functional configuration 401 illustrated in FIG. 4 is realized by the CPU 302 loading a control program for the camera scanner 101 stored in the HDD 305 into the RAM 303 and executing the program.

In the functional configuration 401, the main control unit 402 is the center of control and controls other modules in the functional configuration 401.
The image acquisition unit 416 is a module that performs image input processing. The image acquisition unit 416 includes a camera image acquisition unit 407 and a distance image acquisition unit 408.

A camera image acquisition unit 407 acquires image data output from the camera unit 202 via the camera I / F 308 and stores the image data in the RAM 303.
The distance image acquisition unit 408 acquires the distance image data output from the distance image sensor unit 208 via the camera I / F 308 and stores it in the RAM 303. Details of the processing of the distance image acquisition unit 408 will be described in the region detection processing described later with reference to FIG.

  The recognition processing unit 417 is a module that detects and recognizes the movement of an object on the document table 204 from image data acquired by the camera image acquisition unit 407 and the distance image acquisition unit 408. The recognition processing unit 417 includes a gesture recognition unit 409 and an object detection unit 410.

The gesture recognition unit 409 continues to acquire an image on the document table 204 from the image acquisition unit 416, and notifies the main control unit 402 when a gesture such as a touch is detected.
When the object detection unit 410 receives notification of the object placement waiting process or the object removal waiting process from the main control unit 402, the object detection unit 410 acquires an image obtained by capturing the document stage 204 from the image acquisition unit 416. In addition, the object detection unit 410 performs processing for detecting the timing at which an object is placed on the document table 204 and stopped or the timing at which the object is removed.

  The scan processing unit 418 is a module that actually scans an object. The scan processing unit 418 includes a floating area detection unit 411, an image processing unit 412, and a content presence / absence determination unit 413.

The floating area detection unit 411 performs a floating area detection process shown in FIG.
The image processing unit 412 generates a color-adjusted image in which the image data acquired from the camera image acquisition unit 407 is adjusted to improve the appearance such as color.

  The content presence / absence determination unit 413 determines whether or not content exists in a specified area of a specified image (content presence / absence determination). This content presence / absence determination is performed as follows. First, the content presence / absence determination unit 413 masks areas other than the specified area from the specified image. Subsequently, the content presence / absence determination unit 413 performs edge detection by the Canny method. Subsequently, the content presence / absence determination unit 413 checks the ratio of the number of pixels detected as an edge to the number of pixels in the designated area. Further, the content presence / absence determination unit 413 determines that content exists when the ratio is greater than a predetermined value, and determines that content does not exist when the ratio is smaller than the predetermined value. Note that the content target may be limited to only characters. In this case, the content presence / absence determination unit 413 applies a known attribute determination technique, and determines that content exists if a character is included. If there is only an image, the content presence / absence determination unit 413 determines that the content is not content. Limiting the content target to only characters is useful when it is necessary to prevent a reduction in OCR accuracy even if a reduction in visibility is acceptable.

The user interface unit 403 includes a GUI component generation / display unit 414 and a projection area detection unit 415.
The GUI component generation display unit 414 receives a request from the main control unit 402, generates a GUI component such as a message or a button, and requests the display unit 406 to display the generated GUI component. Note that the display area of the GUI part on the document table 204 is detected by the projection area detection unit 415.

  The display unit 406 displays the requested GUI component on the short focus projector 207 or the LCD touch panel 330 via the display controller 309. Since the projector 207 is installed toward the document table 204, it is possible to project a GUI component on the document table 204.

  Further, the user interface unit 403 receives a gesture operation such as touch recognized by the gesture recognition unit 409, an input operation from the LCD touch panel 330 via the serial I / F 310, and coordinates thereof. Then, the user interface unit 403 determines the operation content (such as a pressed button) by associating the content of the operation screen being drawn with the operation coordinates. The user interface unit 403 receives the operation of the operator by notifying the main control unit 402 of the operation content.

The network communication unit 404 communicates with other devices on the network 104 by TCP / IP or the like via the network I / F 306.
The data management unit 405 stores and manages various data such as work data generated in the execution of the control program 401 in a predetermined area on the HDD 305.

<Description of Distance Image Sensor Unit 208 and Distance Image Acquisition Unit 408>
The distance image sensor unit 208 is a pattern image type distance image sensor using infrared rays. As shown in FIG. 3, the distance image sensor unit 208 includes an infrared pattern projection unit 361, an infrared camera 362, and an RGB camera 363.

  The infrared pattern projection unit 361 projects a three-dimensional measurement pattern onto an object using infrared rays that are invisible to human eyes. The infrared camera 362 is a camera that reads a three-dimensional measurement pattern projected onto an object. The RGB camera 363 is a camera that captures visible light visible to the human eye using RGB signals.

  In the present embodiment, as described above, an infrared pattern projection method is employed as the distance image sensor unit 208, but a distance image sensor of another method can also be used. For example, the distance image sensor unit 208 may be a stereo system that performs stereo stereoscopic viewing with two RGB cameras, or a TOF (Time of Flight) system that measures distance by detecting the flight time of laser light.

<Description of gesture recognition unit 409>
Details of processing of the gesture recognition unit 409 will be described.
The gesture recognition unit 409 acquires a distance image and a three-dimensional point group from the distance image acquisition unit 408. Subsequently, the gesture recognition unit 409 obtains a three-dimensional point group of the hand by extracting a three-dimensional point group of skin color that is above a predetermined height from the plane including the document table 204. Subsequently, the gesture recognizing unit 409 generates a two-dimensional image obtained by projecting the extracted three-dimensional point group of the hand onto the plane of the document table 204, and detects the outer shape of the hand. At this time, it is assumed that the correspondence relationship that each point of the three-dimensional point group of the hand corresponds to which of the coordinates of the two-dimensional image projected on the plane of the document table 204 is stored. Subsequently, the gesture recognition unit 409 calculates, for each point on the detected outline of the hand, the curvature of the outline at that point, and detects a point where the calculated curvature is smaller than a predetermined value as a fingertip. Subsequently, the gesture recognizing unit 409 calculates the distance from the plane including the document table 204 of the fingertip detected at each fingertip from the three-dimensional point group using the previous correspondence. The gesture recognition unit 409 determines that there is a touch gesture when the calculated distance is equal to or smaller than a minute predetermined value, and notifies the main control unit 402 of it.

  As for fingertip detection, a method for detecting a fingertip from an image projected on a two-dimensional image from a three-dimensional point group has been described here, but the image to be subjected to fingertip detection is not limited to this. For example, the hand region is extracted from the background difference of the distance image or the skin color region of the RGB image, and the fingertip in the hand region is detected by the same method (external curvature calculation, etc.) as described above. Also good.

<Description of Floating Area Detection Unit 411>
Details of the floating area detection processing by the floating area detection unit 411 will be described with reference to FIGS. 5 and 6.
FIG. 5 is a flowchart for explaining an example of a process for detecting a floating area of a document (a floating area detection process) in the first embodiment. The processing shown in the flowcharts of FIGS. 5A and 5B is executed by the floating area detection unit 411. That is, the processing shown in FIGS. 5A and 5B is realized when the CPU 302 loads the control program for the camera scanner 101 stored in the HDD 305 to the RAM 303 and executes it.

FIG. 6 is a diagram for explaining an example of processing for detecting a floating region.
FIG. 6A shows a document 600 that does not float. FIG. 6B shows a document 601 with a raised corner. FIG. 6C shows a document 602 with a floating side. FIG. 6D shows a document 603 whose center is floating.

  First, in S500 of FIG. 5A, the floating area detection unit 411 acquires a distance image (distance information) using the distance image acquisition unit 408. For example, when the originals 600, 601, 602, and 603 shown in FIGS. 6A to 6D are placed on the document table 204, the acquired distance images are shown in FIGS. 6E to 6H, respectively. Distance images 604, 605, 606, and 607.

  Subsequently, in S501, the floating area detection unit 411 detects a floating area using the distance image acquired in S500. The floating area is detected as follows. First, the floating area detection unit 411 acquires a difference image between the distance image obtained in S500 and the distance image in a state where nothing is placed on the document table 204 acquired in advance. Subsequently, the floating area detection unit 411 uses a predetermined value determined in advance in the difference image as a threshold, specifies a pixel having a value equal to or larger than the threshold, and detects a circumscribed rectangle of an area where the pixel is continuous. Next, the floating area detection unit 411 sets the detected circumscribed rectangle as a floating area in the document. Further, the floating area detection unit 411 detects a plurality of circumscribed rectangles that are not adjacent to each other as floating areas when there are floating at a plurality of locations on the document.

  Here, with regard to the detection of the floating area, a specific example of detecting the floating area 608 in FIG. 6I from the distance image 605 of the document with the corners in FIG. It explains using.

FIG. 7 is a diagram for explaining processing for specifying the type of float.
FIG. 7A is a diagram showing a coordinate system in the distance image 605 of the document with the floating corner in FIG. Here, the distance image is expressed in the XY coordinate system, and the image size is 640 × 480 pixels. When S501 in FIG. 5A is executed on the distance image 605 in FIG. 6F, a floating region 608 as shown in FIG. 7A is detected. The coordinates of the floating area 608 are detected as a rectangle having a width w and a height h from the upper left coordinates of the area. More specifically, the coordinates of the floating area 608 are detected as a rectangle having an upper left coordinate (500, 400), a width of 50, and a height of 50. As described above, the floating area 608 in FIG. 6I is detected from the distance image 605 of the document with the corner in FIG.

  Similarly, in the distance images 604, 605, 606, and 607 in FIGS. 6E to 6H, floating regions are detected in S501 in FIG. 5A, respectively. As a result, the floating areas 608, 609, 610, and 611 in FIGS. 6 (i) to 6 (k) are detected, and the coordinates, width, and height of the floating areas are calculated.

  If the original does not float as shown in FIG. 6A, the floating area is not detected from the distance image 604 in FIG. 6E. Further, when the document has a plurality of floats as shown in FIG. 6C, a plurality of lift areas 609 and 610 are detected as shown in FIG. 6J.

<Identify the type of float in the float area>
Hereinafter, the description returns to the flowchart of FIG.
In S502, the floating area detection unit 411 acquires one floating area that does not specify the type of floating from the floating area detected in S501.
Next, in S503, the floating area detection unit 411 identifies the type of floating in the floating area acquired in S502. Here, details of S503 will be described with reference to FIG.

FIG. 5B is a flowchart showing a process for specifying the type of float.
In S509, the floating area detection unit 411 identifies the position of the center of gravity in the floating area. The position of the center of gravity is used in order to identify a particularly floating part in the floating area. If the coordinates of each pixel in the floating area are (x, y) and the total number of pixels in the floating area is M, the center of gravity (X, Y) is calculated using the following equation (4).

  In order to identify a particularly floating part in the floating region based on the center of gravity position, it is desirable to use a threshold value larger than the threshold value used in S501 of FIG.

  Subsequently, in S510, the floating area detection unit 411 divides the floating area into a plurality of areas. For example, the floating area is divided into nine areas by dividing the width and height of the floating area into three equal parts (for example, FIG. 7C).

  In S511, the floating area detection unit 411 determines whether the center of gravity is included in the side of the divided area. When the floating area detection unit 411 determines that the center of gravity is included in the side of the divided area (Yes in S511), the floating area detection unit 411 proceeds to S515. In S515, the floating area detection unit 411 sets the type of the floating as “side” and ends the process of FIG.

  On the other hand, when the floating area detection unit 411 determines in S511 that the center of gravity is not included in the side of the divided area (NO in S511), the floating area detection unit 411 proceeds to S512.

  In S512, the floating area detection unit 411 determines whether the center of gravity is included in the corner of the divided area. When the floating area detection unit 411 determines that the center of gravity is included in the corner of the divided area (Yes in S512), the floating area detection unit 411 proceeds to S514. In step S514, the floating area detection unit 411 sets the type of floating as “corner” and ends the process in FIG.

  On the other hand, when the floating area detection unit 411 determines in S512 that the center of gravity is not included in the corner of the divided area (NO in S512), the floating area detection unit 411 proceeds to S513. In step S513, the floating area detection unit 411 sets the type of floating as “center” and ends the process of FIG. The above is the processing for specifying the type of float in S503.

  Here, with regard to the processing for specifying the type of floating, a specific example from the floating region 608 in FIG. 6 (i) until the type of floating is specified will be described with reference to FIGS. 7 (b) and 7 (c). .

FIG. 7B is a diagram showing the floating area 608.
First, in S509 of FIG. 5B, the floating area detection unit 411 identifies the center of gravity position g of the floating area 608. By using the above-described equation (4), the barycentric position g is calculated as (x, y) = (548,448), for example.

Subsequently, in S510, the floating area detection unit 411 divides the floating area 608 into a plurality of areas. As an example, the floating region 608 is divided into nine regions.
FIG. 7C shows an example in which the floating area 608 is divided into nine areas.
The divided areas are classified into corners, sides, and centers. The center-of-gravity position g in the floating region 608 is included in the lower right corner region of the divided regions as shown in FIG.

  Subsequently, in S511, the floating area detection unit 411 determines whether the center of gravity g is included in the side of the divided area. In FIG. 7C, since the center of gravity g is not included in the side of the divided area, the determination is no and the process proceeds to S512. In S512, the floating area detection unit 411 determines whether the center of gravity is included in the corner of the divided area. In FIG. 7C, since the center of gravity g is included in the corner of the divided area, the determination is yes, and the process proceeds to S514. In S514, the type of floating in the floating area 608 is “corner”. As described above, the type of floating is specified from the floating region 608 in FIG.

  Similarly, the floating regions 609, 610, and 611 in FIGS. 6 (j) and (k) are divided as shown in FIGS. 7 (d) and 7 (e), and the floating regions in the floating regions 609 and 610 are separated. The type is “Side”. In addition, the floating type of the floating region 611 is “center”.

<Example of how to hold down>
Hereinafter, the description returns to the flowchart of FIG.
After the process of S503, the floating area detection unit 411 advances the process to S504.
In S504, the floating area detection unit 411 determines the type of floating in the floating area specified in S503. When the floating area detection unit 411 determines that the type of the float is “side” (in the case of “side” in S504), the process proceeds to S505. In step S505, the floating area detection unit 411 displays (projects) an appropriate pressing method on the document table 204 by the projector 207 in order to press the side of the document with a finger, and advances the process to step S508.

  If the floating area detection unit 411 determines that the type of floating is “corner” (in the case of “corner” in S504), the process proceeds to S506. In step S506, the floating area detection unit 411 displays (projects) an appropriate pressing method on the document table 204 by the projector 207 in order to press the corner of the document with a finger, and advances the process to step S508.

  If the floating area detection unit 411 determines that the type of floating is “center” (in the case of “center” in S504), the process proceeds to S507. In step S507, the floating area detection unit 411 displays (projects) an appropriate pressing method on the document table 204 by the projector 207 in order to press the center of the document with a finger, and advances the process to step S508.

Here, a display example of an appropriate pressing method will be specifically described. Here, FIG. 8 will be described with reference to FIG. 8 as an example of a case where the document 601 with the raised corners in FIG.
FIG. 8 is a diagram showing an example of a display method of how to hold down when a document 601 with a raised corner is placed on the document table 204. The document table 204 has a width 640 and a height 480 with the upper left as the origin in the XY coordinate system. Further, the width and height of the document table 204 are not limited to these values, and other values may be used.

  As a display example of how to hold down, a display example including display of a message 800 and an icon 801 is shown. The message 800 displays a word prompting not to hide the corners of the document 601 on the upper side of the document table 204. The display position of the message 800 is not limited to the example shown in FIG. 8 and may be, for example, the lower side, the left side, or the right side of the document table 204. The icon 801 displays a finger icon so that the user can easily imagine the actual pressing method. The finger icons to be displayed may be switched between the right hand and left hand finger icons depending on the position of the floating area. For example, FIG. 8 shows an example in which the right hand finger icon is displayed because the lower right corner is floating, but when the lower left corner is floating, the left hand finger icon is displayed at the lower left corner position. You may make it do.

  Further, as shown in FIG. 8, the icon 801 is displayed such that the rectangular vertex of the icon 801 coincides with the barycentric position obtained in S509 of FIG. 5B. The display position of the icon 801 is not limited to this. For example, the icon 801 may be displayed at a position away from the center of gravity by a predetermined distance or more, or may be displayed near the floating area. When the icon 801 is a finger icon, the coordinates of the center of gravity and the coordinates of the fingertip of the right hand and the fingertip of the left hand may be displayed. As described above, how to press the document 601 placed on the document table 204 is displayed.

In the following, variations of the display of how to hold down when the corners, sides, and center of the document are raised will be described with reference to FIGS. 13A, 13B, 14, and 15. FIG.
13A, 13B, 14 and 15, when the user 1100 scans an original with the camera scanner 101, the user 1100 is in front of the camera scanner 101 as shown in FIG. Corresponds to a display example assuming that

FIGS. 13A and 13B are diagrams illustrating a list of display methods of how to hold a document with a raised corner in the first embodiment.
FIG. 14 is a diagram illustrating a display list of how to hold a document with a floating side in the first embodiment.
FIG. 15 is a diagram illustrating a display list of how to hold a document with a floating center in the first embodiment.
In FIG. 13A, FIG. 13B, FIG. 14, and FIG. 15, the user 1100 and the camera scanner 101 are descriptions for clarifying the positional relationship between the user and the camera scanner. Is not included.

  (A)-(d) of FIG. 13A shows a display example when only one portion of the corners of the document is floating. In this case, the floating area detection unit 411 presents a pressing method for pressing a corner of the floating document. In addition, the floating area detection unit 411 switches icons to be displayed depending on whether the floating area is on the left side or the right side, and displays icons 801 so that the fingertips coincide with the center of gravity.

  (E) to (j) of FIG. 13B show display examples when two of the corners of the document are floating. In this case, since a plurality of floating areas are detected, the floating area detection unit 411 displays the icon 801 for each floating area in the same process as when only one corner is floating. That is, the floating area detecting unit 411 presents a pressing method for pressing each corner of the floating document. In addition, as shown in (g) and (h) of FIG. 13B, when both the floating areas at the two corners are detected on the right side or the left side, the floating area detection unit 411 detects the lower left corner in FIG. 13 (g). In FIG. 13H, a left hand icon is displayed in the lower right corner.

  14A to 14D show display examples in the case where only one portion of the sides of the document is floating. In this case, a method of holding down both ends of the floating side is presented. The icons 801 displayed in (a) to (d) of FIG. 14 display the same icons as those in which two corners included in the side are floating. That is, the same icons as (e) to (h) in FIG. 13B are displayed. The icon display position is set at the center of the short side of the floating area.

  FIG. 14E and FIG. 14F show display examples when two of the sides of the document are floating. When the left and right sides are floating as shown in FIG. 14 (e), a message 800 and an icon 801 that prompt the user to press the center of the side are displayed. When the upper and lower sides are floating as shown in FIG. 14 (f), it is difficult to press from the position of the user, so a message 800 prompting the user to press the center of the side is displayed after the document is rotated 90 degrees. The display position of the icon 801 is displayed at a location close to the side of the document table 204 in consideration of, for example, the rotation of the document.

  (A)-(c) of FIG. 15 is a figure which shows the example of a display when the center has floated. As shown in FIG. 15A, when the center of the document is vertically long (in the front direction of the user), for example, a message 800 that prompts the user to press the center of both sides while stretching (pulling) the document is displayed. Further, as shown in FIG. 15B, a message 800 that prompts the user to press the center of the side after rotating the document by 90 degrees may be displayed. The icons 801 are displayed at locations separated by a predetermined distance or more from the floating area. When the center of the document is floated horizontally as shown in FIG. 15C, a message 800 prompting to press the center of the side is displayed. The icon 801 is displayed at the center of the short side of the floating area.

  As described above, according to the first embodiment, the floating area can be specified, and an appropriate pressing method can be presented to the user for each floating area. Thus, when the user scans the document, the user can easily carry out appropriate pressing methods against various floating documents.

  As described in the first embodiment, when detecting a floating area of a document, a plurality of floating areas may be detected. For example, when three or more floating areas are detected, there is a possibility that the user cannot hold it with both hands. In the second embodiment, a priority is determined for each floating area, and a mechanism for displaying a pressing method for pressing only a floating area having a high priority is provided.

  FIG. 9 is a flowchart for explaining an example of processing for detecting a floating region of a document (floating region detection processing) in the second embodiment. The process shown in this flowchart is executed by the floating area detection unit 411. That is, the processing shown in FIG. 9 is realized by the CPU 302 loading a control program for the camera scanner 101 stored in the HDD 305 into the RAM 303 and executing it. Note that the same steps as those in FIG. 5 are assigned the same step numbers, and detailed descriptions thereof are omitted.

  After the processing of S501 and S501, the floating area detection unit 411 advances the processing to S900. In S900, the floating area detection unit 411 determines whether or not the number of floating areas detected in S501 is greater than a predetermined number. In this embodiment, the predetermined number is assumed to be “2”.

  In S900, when the floating area detecting unit 411 determines that the detected floating areas are not more than the predetermined number (No in S900), the process proceeds to S502. On the other hand, when the floating area detection unit 411 determines that the number of detected floating areas is greater than the predetermined number (Yes in S900), the process proceeds to S901.

  In S901, the floating area detection unit 411 gives priority to each floating area detected in S501. The priority is determined by the presence / absence of content in the floating area and the size of the floating in the floating area. If a floating area with content is imaged without correction, the content is distorted. Therefore, when determining the priority, the floating area detection unit 411 gives priority to the presence / absence of content over the size of the floating. Also, the presence / absence determination unit 413 determines the presence / absence of content in the floating area. Further, as the size of the float in the float area, the maximum value of the difference in the difference image from the distance image in a state where nothing is placed on the document table 204 acquired in advance is used.

  Next, in step S902, the floating area detection unit 411 acquires the predetermined number (here, “2”) of floating areas having high priority. The floating area detection unit 411 performs processing of S502 to S508 only for the floating area acquired in S902, and controls to specify the type of floating and display the pressing method.

FIG. 10 is a diagram for explaining processing when more than a predetermined number of floating areas are detected.
FIG. 10A shows a state in which more than a predetermined number of floating areas are detected. FIG. 10B shows an example of the result of giving priority to the detected floating area. Note that the floating area 1, the floating area 2, and the floating area 3 in FIG. 10B correspond to the floating area 1000, the floating area 1001, and the floating area 1002 in FIG. 10A, respectively.
FIG. 10C shows a display example of how to hold a floating area with high priority.

  In S901 of FIG. 9, the floating area detection unit 411 first compares the presence or absence of content, and sets the highest priority for the floating area 1 including the content. Next, the floating area detection unit 411 compares the floating area 2 and the floating area 3 with the size of the floating, and sets the second highest priority for the floating area 2 with the large floating. Furthermore, the floating area detection unit 411 sets the third highest priority for the remaining floating area 3. In S902, the floating area detection unit 411 acquires the floating area 1 and the floating area 2 having high priority. Thereafter, in S502 and S503, the floating area detection unit 411 identifies the type of floating in the floating area acquired in S902. In S505 to S507, the floating area detection unit 411 displays only the method of pressing the floating area 1 and the floating area 2 with high priority as illustrated in FIG.

  As described above, according to the second embodiment, it is possible to give priority to each floating area and present a method of pressing only the floating area having a high priority. As a result, when scanning the document, the user can easily perform scanning while pressing a portion that should be pressed particularly among a plurality of floating documents.

  In the first embodiment described above, when the user 1100 scans an original with the camera scanner 101, it is assumed that the user 1100 is in front of the camera scanner 101 as shown in FIG. However, as shown in FIG. 11B, the user 1100 may be lying beside the camera scanner 101. At this time, even if the user 1100 holds the document 1101 with one finger so that the side of the document 1101 is not hidden, the user's left hand enters between the camera scanner 101 and the document 1101 as shown in FIG. May be blocked by hand. In this state, when the camera unit 202 captures an image of the original 1101 on the document table 204, a captured image 1102 as shown in FIG. 11C is obtained. In the captured image 1102, the side of the document is largely hidden by the left hand of the user. The reason for this is that the camera unit 202 captures an image of a document from a direction different from the user's viewpoint.

  For example, if the floating area is included in the area on the back of the document table 204 as viewed from the user and the area on the near side as viewed from the camera scanner 101 (camera unit 202), that is, the area 1103 in FIG. The document may be blocked by the user's hand holding the document during imaging. Therefore, in the third embodiment, the position of the user with respect to the camera scanner is detected so that the user's hand or finger holding the document does not enter between the camera scanner and the document, and the user's position, the position of the floating area, and the floating Provide a mechanism to display how to hold the floating area according to the type.

  FIG. 12 is a flowchart for explaining an example of processing for detecting a floating region of a document (floating region detection processing) in the third embodiment. The process shown in this flowchart is executed by the floating area detection unit 411. That is, the processing shown in FIG. 9 is realized by the CPU 302 loading a control program for the camera scanner 101 stored in the HDD 305 into the RAM 303 and executing it. Note that the same steps as those in FIG. 5 are assigned the same step numbers, and detailed descriptions thereof are omitted.

  First, in step S1200, the floating area detection unit 411 acquires the position of the user with respect to the camera scanner 101. As the position of the user to be acquired, it is acquired whether it is front, side, or front as shown in FIG. 11 (a) and FIG. 11 (b). The user's position is acquired as follows. First, the floating area detection unit 411 acquires a captured image using the person detection RGB camera 360, and applies a known face detection technique to the captured image. Furthermore, the floating area detection unit 411 determines that the position of the user is the front when the detected face position is included in a predetermined area such as the center area of the image. If the area is other than that, the user's position is determined to be horizontal. When it is determined that the user's position is horizontal, the floating area detection unit 411 also determines whether the user is on the left or right side when viewed from the camera scanner 101. After the process of S1200, the floating area detection unit 411 advances the process to S500.

When the floating area detecting unit 411 determines that the type of the floating is “side” (in the case of “side” in S504), the projector 207 determines how to hold the side according to the user's position in S1201. Is displayed (projected).
In addition, when the floating area detection unit 411 determines that the type of floating is “corner” (in the case of “corner” in S504), the projector 207 prints the corner pressing method according to the user's position in S1202. Display (project) on the table 204.
In addition, when the floating area detection unit 411 determines that the floating type is “center” (in the case of “center” in S504), the projector 207 prints the center pressing method corresponding to the user's position in S1203. Display (project) on the table 204.

  When the floating area detection unit 411 executes S1201, S1202, or S1203, a floating area is included in an area in which a document may be blocked by a user's hand holding the document during scanning (hereinafter referred to as a “shadow area”). It is determined whether or not. Here, the shadow region is, for example, a region on the back side when viewed from the user and a region on the near side when viewed from the camera scanner 101 (camera unit 202), such as 1103 in FIG.

  When the floating area detection unit 411 determines that the shadow area includes the floating area, the floating area detection unit 411 displays a message prompting the user to press the document after moving to the front, and after the user has moved to the front Control how to hold down the original. On the other hand, when it is determined that the floating area does not include the floating area, the floating area detecting unit 411 displays a message similar to that in the first embodiment, and the document from the current position of the user as in the first embodiment. Control how to hold down.

  In addition, as a specific example of the pressing method to be displayed, since the same display as in the first embodiment is performed when the user is in front, the description is omitted. Hereinafter, specific examples of how to hold down a document when the user is on the side will be described with reference to FIGS. 16A, 16B, 17, and 18. FIG.

FIGS. 16A and 16B are diagrams illustrating a list of display methods of how to hold a document with a raised corner when the user is sideways in the third embodiment.
FIG. 17 is a diagram illustrating a list of display methods of how to hold a document whose side is floated when the user is sideways in the third embodiment.
FIG. 18 is a diagram illustrating a display list of how to hold a document whose center is lifted when the user is lying sideways in the third embodiment.
All of these display examples correspond to the case where the user is on the right side when viewed from the camera scanner 101 as shown in FIG. 11B, that is, the case where the camera scanner 101 is on the left side when viewed from the user. It is a display example on the document table 204 at the time. 16A, FIG. 16B, FIG. 17 and FIG. 18, the user 1100 and the camera scanner 101 are descriptions for clarifying the positional relationship between the user and the camera scanner. Is not included.

  (A)-(d) of FIG. 16A is a figure which shows the example of a display when only one place of the corners of a document is floating. As a difference from the first embodiment, in the case of FIG. 16A in which a shadow area includes a floating area, the floating area detection unit 411 displays a message 800 that prompts the user to move the front and press the corner. To do. Further, in this case, the floating area detection unit 411 displays an icon 801 that presents a pressing method after the user has moved to the front. In the case of the display in FIG. 16A (a), the pressing method after the user has moved to the front is the same pressing method as in FIG. 13A (b). That is, a pressing method for pressing the right back of the document with the finger of the right hand as viewed from the user after movement is presented.

  (E) to (j) of FIG. 16B show display examples when two of the corners of the document are floating. In the case of (f), (g), and (j) in FIG. 16B where the shadow area includes a floating area as a difference from the first embodiment, the floating area detection unit 411 moves forward with respect to the user. Display a message 800 prompting you to hold a corner. Further, in this case, the floating area detection unit 411 displays an icon 801 that presents a pressing method after the user has moved to the front. In the case of the display of (f), (g), and (j) in FIG. 16B, the pressing method after the user has moved to the front is the same as that in (h), (f), and (i) of FIG. 13B, respectively. Become.

  FIGS. 17A to 17D show display examples when only one side of the document is floating. As a difference from the first embodiment, in the case of FIGS. 17A and 17C in which the shadow area includes the floating area, the floating area detection unit 411 moves to the front with respect to the user and then presses the corner. A prompt message 800 is displayed. Further, in this case, the floating area detection unit 411 displays an icon 801 that presents a pressing method after the user has moved to the front. In the display of FIGS. 17A and 17C, the pressing method after the user has moved to the front is the same pressing method as in FIGS. 14C and 14B, respectively.

  FIGS. 17E and 17F show display examples when two of the sides of the document are floating. In the case of FIG. 17E in which the shadow area includes a floating area as a difference from the first embodiment, the floating area detection unit 411 moves the document to the front by 90 degrees after moving to the front. A message 800 prompting the user to hold down the center of is displayed. Further, in this case, the floating area detection unit 411 displays an icon 801 that presents a pressing method after the user has moved to the front. In the case of the display in FIG. 17E, the pressing method after the user has moved to the front is the same pressing method as in FIG.

  Further, as a difference from the first embodiment, in the case of FIG. 17F where the shadow area includes the floating area, the floating area detection unit 411 moves to the front with respect to the user and then presses the center of the side. A prompt message 800 is displayed. Further, in this case, the floating area detection unit 411 displays an icon 801 that presents a pressing method after the user has moved to the front. In the case of the display of FIG. 17F, the pressing method after the user has moved to the front is the same pressing method as in FIG.

  18A and 18B show display examples when the center of the document is floating. As a difference from the first embodiment, in the case of FIG. 18A in which a floating area is included in the shadow area, the floating area detecting unit 411 displays a message 800 that prompts the user to press the side after moving to the front. indicate. Further, in this case, the floating area detection unit 411 displays an icon 801 that presents a pressing method after the user has moved to the front. In the case of the display in FIG. 18A, the pressing method after the user has moved to the front is the same pressing method as in FIG.

  Further, as a difference from the first embodiment, in the case of FIG. 18B in which a shadow area includes a floating area, the floating area detection unit 411 moves to the front with respect to the user and presses the side while stretching the document. A message 800 prompting the user is displayed. Further, in this case, the floating area detection unit 411 displays an icon 801 that presents a pressing method after the user has moved to the front. In the case of the display in FIG. 18B, the pressing method after the user has moved to the front is the same pressing method as in FIG.

  As described above, according to the third embodiment, it is possible to present an appropriate pressing method for each floating area to the user according to the position of the user with respect to the camera scanner 101. Thereby, when the user scans the document, the user can easily perform a pressing method in which a hand does not enter between the camera scanner and the document.

  As described above, according to each embodiment, it is possible to specify the type of floating for each floating region, and to present the user with an appropriate method of pressing a document according to the type of floating. Therefore, the user can easily grasp an appropriate pressing method against the floating of the document, and can scan by pressing the document with the appropriate pressing method. As a result, when reading a document with a stand type scanner, it is possible to suppress the occurrence of a situation where the edge of the document is read with the user's hand or finger hidden.

In addition, the structure of the various data mentioned above and its content are not limited to this, You may be comprised with various structures and content according to a use and the objective.
Although one embodiment has been described above, the present invention can take an embodiment as, for example, a system, apparatus, method, program, or storage medium. Specifically, the present invention may be applied to a system composed of a plurality of devices, or may be applied to an apparatus composed of a single device.
Moreover, all the structures which combined said each Example are also contained in this invention.

(Other examples)
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in the computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.
Further, the present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device.
The present invention is not limited to the above embodiments, and various modifications (including organic combinations of the embodiments) are possible based on the spirit of the present invention, and these are excluded from the scope of the present invention. is not. That is, the present invention includes all the combinations of the above-described embodiments and modifications thereof.

1 Hand scanner housing
2 Input documents
3 One-dimensional image sensor
4 Wide lens
5 Lighting lamp

Claims (18)

An original reading device that reads image data from a placed original,
Obtaining means for obtaining distance information of a region where the document is placed;
Detecting means for detecting a floating area of the document placed in the area based on the distance information acquired by the acquiring means;
Specifying means for specifying the type of lifting of the document for each floating area detected by the detecting means;
Presenting means for presenting a document pressing method for correcting the document floating according to the type of document floating;
A document reading apparatus comprising: When the number of floating areas is greater than a predetermined number, setting means for setting a priority for each floating area,
The presenting means presents, when the number of the floating areas is larger than a predetermined number, a method of pressing the predetermined number of floating areas set by the setting means as an area to be pressed by the user. The document reading apparatus according to claim 1.   The document reading apparatus according to claim 2, wherein the setting unit determines the priority based on presence / absence of content in the floating area and a size of the floating in the floating area. Detecting means for detecting a position of a user with respect to the document reading device;
The presenting means presents how to hold down the original depending on whether or not the floating area is included in a predetermined area when the position of the user detected by the detecting means is not in front of the original reading apparatus. The document reading device according to claim 1, wherein the document reading device is switched.   The presenting means moves the user to the front of the original reading apparatus when the position of the user detected by the detecting means is not the front of the original reading apparatus, or when the floating area is included in a predetermined area. The document reading apparatus according to claim 4, wherein the document reading apparatus and a pressing method for pressing the document from a position after the movement are presented.   The presenting means presents a pressing method for pressing a corner of the floating document when the type of the document floating is a type in which the corner of the document is floating. The document reading device according to any one of the above.   The presenting means presents a pressing method for pressing both ends of the floating side when the type of floating of the original is a type in which one side of the original is floating. The document reading device according to any one of?   The presenting means presents a pressing method for pressing the center of each of the floating sides when the type of floating of the document is a type in which a plurality of sides of the document are floating. The document reading apparatus according to any one of 1 to 5.   The presenting means presents a pressing method for pressing the center of both sides of the document when the document float type is a type in which the center of the document is floating. The document reading apparatus according to claim 1.   When the floating area formed in the center of the document extends in the front direction of the user, the presenting means holds the document while pulling the center of both sides extending in the front direction of the user. The document reading apparatus according to claim 9, wherein the document is rotated by 90 degrees, and a pressing method for pressing the center of both sides of the rotated document extending in the front direction of the user is presented.   When the floating area formed in the center of the document extends in a direction orthogonal to the front direction of the user, the presenting means presents a pressing method for pressing the center of both sides of the document extending in the front direction of the user. The document reading device according to claim 9.   The said presentation means presents how to hold down by projecting the information which shows how to hold down the said document on the area | region which mounts the said document, The any one of Claims 1-11 characterized by the above-mentioned. Document reader.   13. The document reading apparatus according to claim 12, wherein the information indicating how to press the document includes at least one of a message explaining how to press the document and an image indicating how to press the document. .   The document reading apparatus according to claim 13, wherein the image indicating how to press the document includes a finger icon for pressing the document.   The document reading apparatus according to claim 14, wherein the presenting unit projects the finger icon onto a floating area of the document.   The document reading apparatus according to claim 15, wherein the presenting unit switches and projects an icon corresponding to the right finger and an icon corresponding to the left finger according to the position of the floating area. A method for controlling a document reading apparatus that reads image data from a placed document,
An acquisition step of acquiring distance information of an area where the document is placed;
A detection step of detecting a floating area of the document placed in the area based on the distance information acquired in the acquisition step;
A specifying step for specifying the type of floating of the document for each floating region detected in the detecting step;
A presenting step for presenting how to hold down the original for correcting the floating of the original according to the type of floating of the original;
A method for controlling a document reading apparatus, comprising:   The program for functioning a computer as a means of any one of Claims 1-16.

Images