JP2010220060A - Image processing apparatus, program, method and system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the direction of an original in an imaged image appropriate. <P>SOLUTION: In an image when it is determined that a placing operation to an original platen is started in a step S3, the lengths of two adjacent sides of the original are detected (step S4) and the longer one of the two sides is determined as a specified side (step S7). When a shutter key is operated, image data for one frame imaged by a CCD at the point of time are captured (step S9). In order to correct the image so as to make the direction of the original in the image data appropriate, the rotation angle of the image required for the correction processing is calculated first (step S10). For the calculation of the rotation angle, the rotation angle corresponding to the rotating direction of the original for turning the specified side to a reference side is calculated on the basis of the reference side set in a step S1 and the specified side determined in the step S7. When the rotation angle is calculated, rotation image processing of the captured image data is performed by the rotation angle (step S11). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image processing apparatus having an imaging function, an image processing program, an image processing method, and an image processing system used therefor.

  2. Description of the Related Art Conventionally, a document camera apparatus is known as an apparatus that captures a document original and outputs the image information to an external device or records it as image data on a recording medium. Such a document camera apparatus is provided with a camera unit capable of adjusting a relative position with respect to a document table in a main body including a document table on which a document document to be photographed is placed, and the camera unit is a CCD or MOS type image sensor. The digital camera is provided with an electronic circuit for performing imaging signal processing and image processing. Therefore, by outputting the document document imaged by the camera unit to the projector via the personal computer, the document document can be projected on the screen for presentation.

  At this time, the direction in which the camera unit takes in the document placed on the document table is fixed. Therefore, if the document is loaded in the wrong direction, the camera is turned upside down from the correct direction or rotated 90 degrees vertically and horizontally. The document is projected. Also, if the original is not placed on the original table at an appropriate angle and is placed at an oblique angle, the camera unit captures the original with the angle shifted as it is, so The document is projected with the angle shifted obliquely. For this reason, in order for the user to correct the document to an appropriate angle, after the document loaded on the document table is taken in via the camera unit, the document image projected via the personal computer and the projector is confirmed, and the orientation is shifted. If it is recognized that the document image data that has been captured must be rotated each time using software on the personal computer, the user is forced to perform complicated operations, which is not convenient. . On the other hand, when there are characters in the original, the character string in the original in the image captured and output by the camera unit is recognized by the personal computer and the image is rotated, and then the projector is corrected. A technique for projecting a character string on a screen in an appropriate direction has been proposed (for example, see Patent Document 1 below).

Japanese Patent Application Laid-Open No. 2004-363636

  However, in the above prior art, character recognition is performed, and correction processing such as rotating an image based on the recognition result is performed. Therefore, when there is no character in the object, for example, when the original is composed only of figures, the correction process cannot be performed. In addition, even if characters are present in the target, if the target is not able to recognize the character because it is significantly deviated from the appropriate angle on the document table, for example, as a result of placing the document in reverse, the character is also reversed. If it cannot be recognized, the correction process cannot be performed. Therefore, it has not been said that the above-mentioned problems have been sufficiently solved.

  The present invention has been made in view of such conventional problems, and depends on a description form such as the presence / absence of characters in a document to be imaged, or a positional relationship between a document placed on a table and an imaging unit. An object of the present invention is to provide an image processing apparatus, an image processing program, an image processing method, and an image processing system that process an image so that the orientation of a document in a captured image is appropriate.

  In order to solve the above-described problem, in the image processing apparatus according to the first aspect of the present invention, a document table on which a document is placed, an imaging unit that images the document table, and an image captured by the imaging unit And determining means for determining whether or not the placement operation of the document on the document table is started, and taking an image by the imaging means when it is determined by the determination means that the placement operation has been started. Detecting means for detecting the contour of the original in the image obtained; determining means for determining one side satisfying a predetermined condition as the designated side in the original in the contour detected by the detecting means; Calculating means for calculating an angle for rotating the image picked up by the image pickup means so that the designated side determined by the means is in a preset direction; Characterized in that it comprises an image processing means for rotation processing the image rotation angle that is.

  According to a second aspect of the present invention, there is provided an image processing apparatus comprising output means for outputting an image rotated by the image processing means to the outside.

  In the image processing apparatus according to claim 3, when the detection unit detects one side of the straight line forming the outline of the document, the determination unit sets the one side as the specified side. It is characterized by determining.

  Further, in the image processing apparatus according to claim 4, when the detection unit detects two sides of the straight line forming the outline of the document, the long side of the two sides is detected. If the ratio of the length of the short side to is equal to or less than a predetermined value, the long side is determined as the designated side.

  In the image processing apparatus according to the fifth aspect of the present invention, when the detection unit detects three sides of the straight line that forms the contour of the document, the determination unit includes the three sides. The longest side is determined as the designated side in the document.

  The image processing apparatus according to the present invention is characterized by further comprising setting means for presetting a direction in which the designated side is rotated.

  In the image processing apparatus according to claim 7, the setting unit sets the rotation direction so that any one of the four sides of the frame of the image is parallel to the designated side. It is characterized by.

  According to an eighth aspect of the present invention, there is provided an image processing program comprising: a computer included in an image processing apparatus that includes a document table and an imaging unit that images a document placed on the document table; Determining means for determining whether or not the document placement operation on the document table is started based on the image picked up by the means, and when it is determined by the determination means that the placement operation is started Detecting means for detecting two sides forming an edge corner of the document, and one of the two sides detected by the detecting means satisfying a predetermined condition as the document. And a rotation angle of an image captured by the imaging unit so that the specified side of the document determined by the determination unit is a predetermined side set in advance. A calculating means for calculating, characterized in that to function as an image processing means for rotation processing the image in the rotation angle calculated by the calculating means.

  The image processing method according to the invention described in claim 9 is an image processing method in an apparatus comprising a document table and an imaging means for imaging a document placed on the document table. Based on the image picked up by the image pickup means, a determination step for determining whether or not the document placement operation on the document table is started, and from this determination step, it is determined that the placement operation has been started. A detection step of detecting two sides forming an edge corner portion of the document, and one of the two sides detected by the detection step satisfying a predetermined condition A determination step for determining as a designated side in the document, and an image is picked up by the imaging unit so that the specified side in the document determined in this determination step is a predetermined side set in advance. A calculation step of calculating a rotation angle of the image, characterized in that it comprises an image processing step of rotating processing the image in the rotation angle calculated by the calculating step.

  In the image processing system according to the tenth aspect of the present invention, there is provided an image pickup unit including an image pickup unit that picks up an image on a document table on which an original is placed, and a transmission unit that transmits the picked-up image to the information processing apparatus. And a determination means for determining whether or not an operation for placing the document on the document table is started based on an image sent from the imaging device, and the document in the image immediately after the placement operation is started Detection means for detecting the contour of the image, determination means for determining one side satisfying a predetermined condition in the contour as a designated side in the document, and imaging by the imaging unit so that the designated side is in a preset direction. An image processing apparatus comprising: a calculating means for calculating an angle for rotating the image; an image processing means for rotating the image at the rotation angle; and projecting an image sent from the image processing apparatus A projection apparatus having a projection means that is characterized by having a.

  According to the present invention, the orientation of the document in the captured image is not affected by the description form such as the presence or absence of characters in the document to be captured or the positional relationship between the document placed on the table and the imaging unit. The image can be corrected so as to be appropriate. Therefore, by using the corrected image, it is possible to project an image in which the target is in an appropriate direction.

1 is a system configuration diagram showing an imaging projection system including a digital camera according to an embodiment of the present invention. It is a block diagram which shows the electric constitution of a digital camera. It is a block diagram which shows the outline of the electrical structure of the projector and PC in the system. It is a flowchart which shows the process sequence in one embodiment of this invention. It is operation | movement explanatory drawing in the same embodiment. It is operation | movement explanatory drawing in the same embodiment. It is operation | movement explanatory drawing in the same embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of an imaging projection system including a document camera according to an embodiment of the present invention.

  This imaging / projection system includes a document camera 1 that captures a rectangular document, a PC (personal computer) 2, and a projector 3. The document camera 1 and the PC 2 are connected by a USB cable 4, and the PC 2 and the projector 3 are connected by an RGB cable 5. The projector 3 is provided with an infrared remote control unit 6 that can be operated from a remote location.

  The document camera 1 includes a camera stand 11 and a digital camera 51 that is detachably attached thereto. The camera stand 11 is a thin and rectangular document table 12 on which a document is placed, a stand body 13 supported by the document table 12, a support arm 14 provided at the upper end portion thereof, and a tip thereof. The mounting portion 15 is provided. The digital camera 51 is attached to the attachment portion 15.

  The digital camera 51 has general functions such as AE, AWB, AF, and the like, and can be used alone. When the digital camera 51 is attached to the camera stand 11, the digital camera 51 passes through the camera stand 11. Image data acquired by imaging is output to the PC 2.

  FIG. 2 is a block diagram showing the configuration of the digital camera 51. The lens block 61 includes an optical system such as a zoom lens and a focus lens, and a drive mechanism for driving the optical system. The optical system is moved in the optical axis direction by a motor 62 provided in the drive mechanism. Driven. The motor 62 operates by a drive signal supplied from a motor driver 64 connected via a bus 63 to a CPU 72 that controls the entire digital camera 51, and drives the optical system. A strobe 65 is also connected to the bus 63.

  In addition, a CCD 66 serving as an imaging unit is disposed on the optical axis of the lens included in the lens block 61. The CCD 66 has a rectangular imaging range, and is driven by a vertical and horizontal driver 68 based on a timing signal generated by a timing generator (TG: Timing Generator) 67 in accordance with a command from the CPU 72, and analog according to the optical image of the subject. Are output to the signal processing circuit 69. The signal processing circuit 69 includes a CDS circuit that removes noise included in the output signal of the CCD 66 by correlated double sampling, an A / D converter that converts an imaging signal from which noise has been removed to a digital signal, and the like. The imaging signal converted into is output to the image processing unit 70.

  The image processing unit 70 performs processing such as pedestal clamping on the input imaging signal, converts it into a luminance (Y) signal and a color difference (UV) signal, and performs image processing such as auto white balance, contour enhancement, and pixel interpolation. Perform digital signal processing to improve quality. The YUV data converted by the image processing unit 70 is sequentially stored in the SDRAM 71, and in the REC through mode, every time one frame of data (image data) is accumulated, it is converted into a video signal, and a liquid crystal monitor (LCD). 53 and displayed on the screen as a through image. The image data for one frame temporarily stored in the SDRAM 71 is compressed by the CPU 72 at the time of shooting when the shutter key is pressed, and finally recorded in the external memory 73 as an image file of a predetermined format.

  The external memory 73 is a memory card that is detachable from the camera body connected via a card interface (not shown). The image file recorded in the external memory 73 is read to the CPU 72 and expanded according to the user's selection operation in the PLAY mode, and is expanded on the SDRAM 71 as YUV data, and then displayed on the liquid crystal monitor 53. The flash memory 74 stores various programs for causing the CPU 72 to control the above-described units, for example, various programs such as an AE, AF, AWB control program, and a data communication program.

  A USB interface 75 is connected to the bus 63. The USB interface 75 is provided with a connection connector connected to a USB connector (not shown) provided on the mounting portion 15 of the camera stand 11 described above, whereby the digital camera 51 is connected to the USB interface 75 from the USB interface 75. Output of image data to the PC 2 and data communication with the PC 2 are possible via the camera stand 11. The digital camera 51 also has a key input unit 76 including operation keys and switches such as a power switch, a mode selection key, and a shutter key. The operation of each operation key in the key input unit 76 is regularly scanned by the CPU 72, and when any operation key is operated, the CPU 72 executes a process corresponding to the key operation.

  FIG. 3 is a block diagram showing an outline of the electrical configuration of the PC 2 and the projector 3. The PC 2 is a general-purpose notebook personal computer, and includes a CPU 81, a RAM 82, a storage device 83, an input device 84, a video adapter 85, a VRAM 86, and a display device 87.

  The video adapter 85 generates a display video signal (RGB signal) and outputs it to a display device 87 including an LCD and its drive circuit. The VRAM 86 stores the display image data generated by the video adapter 85 as needed. To do. The video adapter 85 is provided with an RBG output terminal 88 to which the RGB cable 5 is connected. The video adapter 85 sends image data for display via the RGB cable 5 in accordance with a command from the CPU 81. Output to 3.

  The CPU 81 is provided with a USB interface 89, and the USB cable 4 connected to the document camera 1 is connected to the USB interface 89. Accordingly, image data sent from the document camera 1 (digital camera 51) is input to the CPU 81 via the USB interface 89, and data communication with the document camera 1 is possible as necessary. Yes. The input device 84 is a plurality of keys provided on the PC 2 main body, a mouse connected to the main body, and the like, and the storage device 83 is a hard disk or the like having a relatively large storage capacity. The storage device 83 stores a communication program for performing data communication with the digital camera 51 and the projector 3.

  The projector 3 includes a CPU 91, ROM 92, RAM 93, image input unit 94, display unit 95, key input unit 96, and infrared signal receiving unit 97. An RBG signal input terminal 98 to which the RGB cable 5 is connected is connected to the image input unit 94, and a display signal for projecting an image is input based on the input image signal (RGB signal) input from the PC 2. It is generated and sent to the display unit 95. The display unit 95 includes a light source such as a krypton lamp, an image conversion element such as a liquid crystal or a micromirror array for converting light of the light source into projection light corresponding to an input display signal, and the image conversion element. A display circuit based on image data sent from the PC 2 includes a drive circuit that drives based on a display signal sent from the optical system, and an optical system such as a projection lens provided in the projection unit 3a (see FIG. 1) of the main body. 7 is projected.

  The CPU 91 operates using the RAM 93 as a working memory according to a program stored in the ROM 92 and controls the projector 3 as a whole. The key input unit 96 is composed of a plurality of operation keys prepared for the user to operate the projector 3, and the infrared signal receiving unit 97 is an infrared signal sent from the infrared remote control unit 6 described above. Is received, and the operation signal encoded therein is decoded and sent to the CPU 91.

  That is, in this imaging / projection system, when the digital camera 51 is set to a predetermined mode for photographing a document and transferring the photographed image to the PC 2 in accordance with a photographing operation by the user, the PC 2 performs data communication processing. By executing, the image of the document imaged by the digital camera 51 is sent to the projector 3 via the PC 2 and projected.

In the present embodiment with the above configuration, the CPU 72 of the digital camera 51 executes processing as shown in the flowchart of FIG. 4 based on the program stored in the flash memory 74. That is, first, a reference edge setting process is executed (step S1). In this reference side setting process, when a user places a rectangular document on the document table 12, one side of the document (a specified side to be described later) is an upper side, a lower side, a left side, or a right side parallel to the frame of the captured image. This is a process for setting in advance which side (reference side to be described later) to be used for rotational correction of the captured image. In this process, the following options (1) to (4) are displayed on the liquid crystal monitor 53.
(1) The rotation is corrected so that the designated side of the document is the upper side.
(2) 〃 Correct the rotation so that it is at the bottom.
(3) 回 転 Correct the rotation so that it is on the left side.
(4) 〃 Correct the rotation so that it is on the right side.

  If any one of these options is selected by key operation, the option is stored in the SDRAM 71. Therefore, the user can select any side of the four sides parallel to the frame of the image as a reference side that serves as a reference when the image is rotationally corrected. Note that “(1) Rotation correction is performed so that the designated side of the document becomes the upper side” is set by default. Therefore, when the user does not perform a selection operation, option (1) is automatically set. The

  Subsequently, the document table monitoring operation is started (step S2). That is, the vertical and horizontal drivers 68 drive the CCD 66 at a frame rate of 30 fps, for example, based on the timing signal generated by the timing generator 67. The CPU 72 monitors the document table 12 by referring to images sequentially stored in the SDRAM 71 through the image processing unit 70 at this frame rate.

  Then, by comparing the images before and after sequentially stored in the SDRAM 71 at the frame rate, it is determined whether or not there is a document placing operation (whether or not the document placing operation is started) (step S3). . That is, when there is no document placing operation, as illustrated in FIG. 5A, the image P in which only the document table 12 is displayed in the frame F is stored in the SDRAM 71 at the frame rate. However, when the user starts the operation of placing the document on the document table 12, a part of the document M is picked up as shown in FIG. Change. Therefore, the image P before and after being sequentially stored in the SDRAM 71 at the frame rate is compared, and if a part of the image P is changed, it is determined that the document placement operation has been started (started).

  Next, the lengths of two adjacent sides of the document are detected in the image when it is determined in step S3 that the placing operation has been started (step S4). That is, in the image P of FIG. 5B, the lengths of the two sides L1 and L2 that form the corner C of the document M are detected. Further, it is determined whether or not the ratio of the detected lengths of the two sides is within a predetermined range (step S5). Then, as shown in FIG. 5B, when L1≈L2 and the difference between the lengths of the two sides L1 and L2 is within a predetermined range (step S5 → YES), the liquid crystal monitor 53 Is displayed (step S6), and the process returns to step S3.

  If the determination in step S5 is NO and the ratio of the detected lengths of the two sides exceeds a predetermined range, the long side of these two sides is determined as the designated side (step S7). Therefore, as shown in FIG. 6A, in the image P, the relationship between the lengths of the two sides L1 and L2 forming the corner portion C of the document M is clearly L1> L2, and the two sides L1 and L2 When the ratio of the lengths exceeds the predetermined range, the side L1 that is the long side of the two sides L1 and L2 is determined as the designated side.

  Subsequently, it is determined whether or not the shutter key has been operated (step S8), and the process waits until the shutter key is operated. Accordingly, during this time, the user completes the operation of placing the document M on the document table 12 as shown in FIG. At this time, as shown in the figure, the document M may be placed on the document table 12 and the frame F in a state where the document M is upside down and the angle is shifted.

  When the shutter key is operated in this state, one frame of image data captured by the CCD 66 at that time is taken into the SDRAM 71 via the image processing unit 70 (step S9). Therefore, when the shutter key is operated in the state shown in FIG. 6B, the image P having the document M in a state of being upside down and shifted in angle with respect to the document table 12 and the frame F is captured. Become.

  Therefore, in order to correct the image so that the orientation of the original M in the image P is appropriate, first, the rotation angle of the image necessary for the correction is calculated (step S10). The calculation of the rotation angle is based on the reference side set in step S1 and the designated side determined in step S7 according to the rotation direction of the document M such that the designated side becomes the reference side. Calculate the rotation angle.

  More specifically, in step S1, “(2) Rotation correction is performed so that the designated side of the document is the lower side” is selected, and “Lower side (parallel to the image frame as described above)” is the reference. Assume that the side L1 shown in FIG. 6B is set as a side and is determined as the designated side in step S7. Then, the rotation angle of the document M in which the side L1 of the document M shown in the figure is the “lower side” parallel to the frame F in the image P is calculated. Therefore, in the case of this example, the rotation angle of the document M whose side L1 is the “lower side” parallel to the frame F is 150 ° in the clockwise direction, so “150 ° in the clockwise direction” is calculated.

  The rotation angle to be calculated may be calculated in either the clockwise direction or the counterclockwise direction, but it is preferable to detect the rotation angle in the direction in which the value decreases as in this example.

  If this rotation angle is calculated, the image data taken into the SDRAM 71 is subjected to rotation image processing at the rotation angle (step S11). That is, in this example, the rotation angle “clockwise 150 °” is calculated in step S10. Therefore, in step S11, image data is generated by rotating the image clockwise by 150 ° with the center of the document M existing in the image as the rotation center.

  Therefore, as illustrated in FIG. 6B, even if the original M is placed on the document table 12 at any angle as illustrated in FIG. The image can be corrected so as to be parallel to the frame F of P and in a direction desired by the user or an appropriate direction. In addition, unlike the prior art described above, since character recognition is not necessary, the orientation of the document in the captured image can be corrected without being affected by the description form of the captured document.

  Thereafter, the rotated image data is recorded in the external memory 73 and output from the USB interface 75 (step S12). Then, the PC 2 connected to the USB interface 75 operates according to the data communication program, receives the rotated image data, and transmits it to the projector 3. The projector 3 receives this and projects a display image based on the image data sent from the PC 2 onto the screen 7. The display image projected on the screen 7 is based on the rotated image data.

  Therefore, for example, as described above, in step S1, if the setting is made to rotate the image so that the designated side is the lower side parallel to the frame of the captured image, the user places the document on the document table 12. At the time of insertion, by inserting the designated side from the lower side of the original so as to be the lower side of the original, the lower side of the original that is the insertion end face is parallel to the frame in the original image in the captured image that is the reference side. The rotation process can be performed so as to be the lower side. Further, when the user inserts a document into the document table 12, the user may insert it into the frame from the side desired to be the lower side in the captured document image, and may insert it from any of the four sides of the frame. In addition, unlike the prior art described above, it is not necessary to recognize characters, so that the direction of the projected image can be made appropriate regardless of the description form of the projected document.

  In addition, since the side L1 which is the long side of the two sides L1 and L2 is determined as the designated side, the user sets the arbitrary side of the document to be designated as the designated side first on the document table 12. The designated side can be determined by a simple operation of placing the document. Moreover, since the long side L1 is set as the designated side based on the ratio of the two sides L1 and L2, the user can identify the designated side without inserting the side to be designated as the designated side accurately. can do.

  Further, since the direction of the projected image can be made appropriate when the document is inserted into the pedestal, an operation for correcting the direction of the projected image is unnecessary, and this correcting operation may take time. Absent. Therefore, even when this projection system is used in a presentation, it is possible to prevent the inconvenience of stopping the presentation flow due to the time required to correct the direction of the projected image. Can do.

  Further, in the above-described embodiment, when the user tries to place a document with the side that is desired to be the specified side as the first, the side that is desired to be the designated side and the side where the frame is inserted are parallel to each other. Although it is difficult to insert the document, it is assumed that the document is inserted with a slight inclination as shown in FIG. 6A. However, the present invention is not limited to this.

  For example, when the document M is inserted obliquely from the corner of the frame F, as shown in FIG. 7A, the side detected in the above step S4 is only one side of L3. In this case, L3 is determined as the designated side, and the processing after step S7 described above is performed. In this way, when the user inserts the document into the pedestal, one side on the insertion side is determined as the specified side even when the document is inserted not only vertically and horizontally but also from an oblique direction. In addition, an image captured in an appropriate direction can be rotated.

  Further, when a document is inserted substantially parallel to one side of the frame F on the document insertion side, as shown in FIG. 7B, three sides L4, L5, and L6 are detected in step S4 described above. There is a case. In this case, since L5> L4 and L6 are clearly satisfied, L5 may be determined as the designated side without taking the ratio of these sides. And the process after the above-mentioned step S7 can be performed and the image imaged in the appropriate direction can be rotated.

  In the present embodiment, if the difference between the lengths of the two sides L1 and L2 is within the predetermined range as a result of the determination in step S5, re-loading is prompted (step S6), and the process returns to step S3. I did it. However, without returning to step S3, image data may be recorded in the external memory 73 and output from the USB interface 75 to project an image in accordance with the operation of the shutter key.

  In the present embodiment, not only shooting processing but also other processing such as data rotation image processing is performed on the digital camera 51 side. However, only shooting processing is performed on the digital camera 51 side. The image may be sent to the PC 2 and other processing such as data rotation image processing may be executed on the PC 2 side.

  In the embodiment, the case of projecting a captured image has been described. However, the present invention is not limited to this, and the same rotated image processing is performed when the captured image is displayed on a monitor or printed out. You may do it.

1 Document Camera 2 PC
DESCRIPTION OF SYMBOLS 3 Projector 11 Camera stand 12 Document stand 13 Stand main body 14 Support arm 15 Mounting part 51 Digital camera 53 LCD monitor 62 Motor 63 Bus 64 Motor driver 66 CCD
67 Timing Generator 68 Horizontal Driver 69 Signal Processing Circuit 70 Image Processing Unit 71 SDRAM
72 CPU
73 External memory 74 Flash memory 76 Key input part F Frame M Original P Image

Claims (10)

A document table on which an original is placed;
Imaging means for imaging the document table;
A determination unit that determines whether or not an operation of placing a document on the document table is started based on an image captured by the imaging unit;
Detecting means for detecting an outline of the document in an image picked up by the image pickup means when it is determined that the placing operation is started by the determination means;
Determining means for determining, on the contour detected by the detecting means, one side that satisfies a predetermined condition as a designated side in the document;
Calculating means for calculating an angle for rotating the image picked up by the image pickup means so that the designated side determined by the determining means is in a preset direction;
An image processing apparatus comprising: an image processing unit that rotates the image at a rotation angle calculated by the calculation unit. The image processing apparatus according to claim 1, further comprising an output unit that outputs the image rotated by the image processing unit to the outside. 3. The image processing apparatus according to claim 1, wherein when the detection unit detects one side of a straight line forming the outline of the document, the determination unit determines that one side as the designated side. When the detection unit detects two sides of the straight line forming the outline of the document, the determination unit determines that the length of the short side to the long side is less than or equal to a predetermined value. The image processing apparatus according to claim 1, wherein a side is determined as the designated side. The determining unit determines a longest side among the three sides as a designated side in the document when three lines are detected by the detecting unit to form a contour of the document. Item 3. The image processing apparatus according to Item 1 or 2. 6. The image processing apparatus according to claim 1, further comprising setting means for presetting a direction in which the designated side is rotated. The image processing apparatus according to claim 6, wherein the setting unit sets the rotation direction so that any one of four sides of the frame of the image is parallel to the designated side. A computer having an image processing apparatus comprising: a document table; and an imaging unit that images a document placed on the document table;
A determination unit that determines whether or not an operation of placing a document on the document table is started based on an image captured by the imaging unit;
Detecting means for detecting two sides forming an edge corner of the document in the image when it is determined by the determining means that the placing operation has been started;
A determining unit that determines, as the designated side in the document, one of the two sides detected by the detecting unit that satisfies a predetermined condition;
Calculating means for calculating a rotation angle of an image picked up by the image pickup means so that a designated side in the document determined by the determining means is a predetermined side set in advance;
An image processing program that causes an image processing unit to rotate the image at a rotation angle calculated by the calculating unit. An image processing method in an apparatus comprising: a document table; and an imaging unit that images a document placed on the document table,
A determination step of determining whether or not an operation of placing a document on the document table is started based on an image captured by the imaging unit;
From this determination step, a detection step of detecting two sides forming an edge corner portion of the document in the image when it is determined that the placement operation has been started;
A determining step for determining, as the designated side in the document, one of the two sides detected by the detecting step satisfying a predetermined condition;
A calculation step for calculating a rotation angle of an image captured by the imaging unit so that a designated side in the document determined by the determination step is a predetermined side set in advance;
And an image processing step of rotating the image at the rotation angle calculated in the calculation step. An imaging device comprising imaging means for imaging a document table on which an original is placed, and transmission means for transmitting the captured image to the information processing apparatus;
Based on the image sent from the imaging device, a judging means for judging whether or not the operation of placing the document on the document table is started, and the outline of the document in the image immediately after the placement operation is started. Detecting means for detecting; determining means for determining one side satisfying a predetermined condition in the contour as a designated side in the document; and an image captured by the imaging unit so that the designated side is in a preset direction. An image processing apparatus comprising: calculation means for calculating an angle to be rotated; and image processing means for rotating the image at the rotation angle;
A projection apparatus provided with a projection means for projecting an image sent from the image processing apparatus;
An image processing system comprising:

Images