JP2006154892A - Information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processor capable of effectively reducing the frequency of a user's operation performed to grasp contents of an image when the image is displayed on a display screen. <P>SOLUTION: The information processor comprises a display section 22 for displaying the image composed of one or more image objects, on the display screen; an input device for instructing the scroll of the image displayed on the display screen; a scroll direction detecting section 30 for detecting the direction of the instructed scroll; an object detecting section 31 for detecting image objects existing in the detected scroll direction; and a display control section 21 for controlling the scroll of the image based on position information on the image objects to display the detected image objects on the display screen. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information processing apparatus having an image display function, and more particularly to a technique suitable for application to a portable information terminal or the like.

  A personal digital assistant (PDA) having a notebook size has a very small display screen size as compared with a notebook size (A4 size or B5 size) personal computer. Therefore, when an image for one page (hereinafter also referred to as “page image”) is displayed so as to fit within the display screen, the text characters and images are too small to grasp the contents of the page image. In such a case, a part of the page image is displayed on the display screen, and the content of the entire page image is grasped (interpreted) by scrolling the image. Therefore, the user who uses the portable information terminal needs to perform enlargement / reduction and scrolling operations on the display image.

  In general, a screen operation by a user is performed using an input device such as a stylus pen, a mouse, or a movement key. Further, the amount that can be scrolled by one operation is limited to the size of the display screen. For this reason, in order to display an image portion deviated from the display screen, it is necessary to perform scroll operations many times, and the user's operation becomes complicated.

  Therefore, in the following Patent Document 1, an acceleration detection unit is provided in a mobile terminal body, a mouse, or the like in order to reduce a complicated scroll operation, and display image scrolling and enlargement / reduction are performed based on the detection output of the acceleration detection unit. Techniques for controlling are disclosed. According to this technology, since the scroll amount is determined according to the magnitude of the acceleration detected by the acceleration detection unit, the size of the display screen can be reduced by quickly moving a mobile terminal device or a mouse provided with the acceleration detection unit. The display image can be greatly scrolled without being limited.

JP 7-271505 A

  However, the prior art described in Patent Document 1 has the following problems. That is, as shown in FIG. 9, there are two image objects 52 and 53 in a page image 51 that forms a vertically long rectangle, and a part of one of the image objects 52 is displayed on the display screen 54. Under circumstances, when moving the mobile terminal body or the mouse to display another image object 53 in place of the currently displayed image object 52, the acceleration caused by this movement is finely adjusted with the sense of the user's hand. Is difficult.

  Therefore, when the acceleration is too small, the display position of the display screen 54 cannot reach the target position of the image object 53. Conversely, when the acceleration is too large, the display position of the display screen 54 is the target. The image object 53 is passed. That is, a situation in which the target image object 53 is not displayed on the display screen 54 due to an excessive or insufficient scroll amount is caused. As a result, even if a large scroll amount exceeding the screen size can be obtained with a single scroll operation, the display position can be reduced by moving the mobile terminal body or the mouse many times until the target image portion is displayed. It needs to be adjusted. Therefore, the number of user operations cannot be sufficiently reduced.

  Moreover, although the said patent document 1 describes detecting the acceleration of the direction perpendicular | vertical to a display screen, and enlarging and reducing a display image based on this detection output, also in this case for the same reason as the above In order to display an image at an appropriate display magnification, it is necessary to move the mobile terminal body and the mouse many times.

  The present invention has been made to solve the above-described problems, and the object of the present invention is to determine the number of user operations performed to grasp the contents of an image when the image is displayed on the display screen. An object of the present invention is to provide an information processing apparatus that can be effectively reduced.

  An information processing apparatus according to the present invention includes a display unit that displays an image composed of one or more image objects on a display screen, an instruction unit that instructs scrolling of an image displayed on the display screen of the display unit, Detection means for detecting the scroll direction instructed by the instruction means, detection means for detecting an image object existing in the scroll direction detected by the detection means, and an image object detected by the detection means on the display screen Display control means for controlling the scrolling of the image based on the position information of the image object.

  In the information processing apparatus according to the present invention, when the user instructs to scroll the image using the instruction unit while the image is displayed on the display screen of the display unit, the scroll direction is detected by the detection unit. At the same time, an image object existing in the scroll direction is detected by the detecting means. Furthermore, the detected image object is displayed on the display screen by controlling the scrolling of the image by the display control means based on the detected position information of the image object.

  According to the information processing apparatus of the present invention, when the user performs a scroll operation in a state where the image object is displayed on the display screen, another image object that exists in the direction of scroll instructed thereby is displayed. Even an image object existing at a position away from the current display position can be displayed with a small number of operations. Therefore, an information processing apparatus with excellent operability can be provided.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration example of an information processing apparatus to which the present invention is applied. The illustrated information processing apparatus is configured by a portable information terminal 10 as shown in FIG. 2, for example, and mainly includes an image processing apparatus 1, an input apparatus 2, a display apparatus 3, and a storage apparatus 4. It becomes the composition. The image processing apparatus 1 includes an application program 5, an operating system 6, a drawing program 7, a drawing memory 8, and input / output hardware 9. In the image processing apparatus 1, an application program 5, a drawing program 7, a drawing memory 8, and input / output hardware 9 are connected to each other via an operating system 6. The drawing program 7 can also be incorporated in the application program 5.

  The input device 2, the display device 3, and the storage device 4 are individually connected to the input / output hardware 9. The input device 2 is operated by a user who uses the information processing device. The input device 2 includes, for example, a stylus pen 11 and a mouse 12 attached to the portable information terminal 10 shown in FIG. 2 or a movement key 13 provided on the terminal body. The movement key 13 is configured to be able to input a movement direction in any one of a vertical direction (up and down direction), a horizontal direction (horizontal direction), and an oblique direction. The display device 3 displays various images (text image, graphics image, image image, etc.) on the display screen. The display device 3 is configured by, for example, a liquid crystal display with a touch panel. The storage device 4 stores various electronic data and information. The storage device 4 is configured by a hard disk, for example.

  FIG. 3 is a block diagram illustrating a functional configuration example of the information processing apparatus according to the embodiment of the present invention. In the figure, the display control unit 21 comprehensively controls processing when an image is displayed on the display unit 22. The display unit 22 is configured by the display device 3. The display unit 22 displays part or all of a page image composed of one or more image objects on a display screen. The image object is partitioned by a rectangular area, and the position (layout) and size in the page are defined by the coordinate data. For example, using the coordinate data (x1, y1) indicating the upper left corner position of the image object and the coordinate data (x2, y2) indicating the lower right corner position of the image object, the position and size of the image object in the page Is defined.

  The mode selection unit 23 selects a processing mode to be applied when a scroll operation is performed by the user while an image is displayed on the display unit 22. This processing mode is selected in advance by the user using the mode selection unit 23. Among the processing modes to be selected, there are a scroll mode applied in scroll processing and a display magnification setting mode applied in display magnification setting processing. Furthermore, the scroll mode includes an automatic scroll mode and a normal scroll mode, and either one can be selected by the user. The display magnification setting mode includes an automatic magnification setting mode and a normal setting mode, and either one can be selected by the user.

  Among these, the processing contents when the automatic scroll mode is applied and when the automatic magnification setting mode is applied will be described in detail later. The normal scroll mode, which is one of the scroll mode options, is a scroll direction according to the moving direction and moving amount of the stylus pen 11 or mouse 12 when the user performs a scroll operation using the stylus pen 11 or mouse 12. And a processing mode in which a scroll amount is set and the image is scrolled according to the setting. The normal setting mode, which is one of the options for the display magnification setting mode, refers to a processing mode in which the display magnification is not automatically set (that is, the display magnification setting is not changed).

  The display magnification setting unit 24 sets a display magnification applied when an image is displayed on the display unit 22. The drawing area setting unit 25 sets a drawing area based on the display magnification set by the display magnification setting unit 24. The drawing area refers to an area to be drawn in the page image (an area displayed on the display screen of the display unit 21). Therefore, when the display magnification set by the display magnification setting unit 24 is increased (when the value of the display magnification is increased), the drawing area in the page image is relatively reduced accordingly, and the display magnification is decreased (display As the magnification value decreases, the drawing area in the page image is relatively enlarged accordingly.

  The drawing command analysis unit 26 analyzes a drawing command for image data input as a display target on the display unit 22. Image data input as a display target is read from the storage device 4 by the application program 5. The input image data is constituted by a set of drawing commands (drawing command group). As specific image data formats, for example, a PDL (page description language) format, a META file format, and the like are conceivable.

  The drawing processing unit 17 performs drawing processing on the image data included in the drawing region set by the drawing region setting unit 25 based on the analysis result of the drawing command analysis unit 26. Data (hereinafter referred to as “drawing data”) that has been subjected to drawing processing by the drawing processing unit 17 is stored in the drawing memory 8. As a format of the drawing data, a bitmap format for expressing an image by a set of dots is applied. The display unit 22 described above displays the drawing data generated by the drawing processing unit 17 as an image on the display screen.

  The screen operation accepting unit 28 accepts a user's screen operation using the input device 2 and outputs operation information based on the screen operation. The user's screen operation is performed when an image is displayed on the display screen of the display unit 22. The operation information based on the user's screen operation includes operation information for changing the display magnification of the image displayed on the display screen (hereinafter also referred to as “magnification change operation information”) and the display information displayed on the display screen. Operation information for scrolling the image (hereinafter also referred to as “scroll operation information”) is included. The magnification change operation information includes a display magnification value designated (desired to be changed) by the user using the input device 2. Among the scroll operation information, as the operation information when the user instructs scroll using the input device 2, information indicating the movement locus of the stylus pen 11 on the display screen, the movement locus of the mouse 12, or movement Information indicating the pressing direction and pressing time of the key 13 is included. The magnification change operation information is output (notified) to the display control unit 21, and the scroll operation information is output (notified) to the display control unit 21, the scroll amount calculation unit 29, and the scroll direction detection unit 30, respectively.

  The scroll amount calculation unit 29 calculates the scroll amount based on the scroll operation information output from the screen operation reception unit 28. For example, when the user's screen operation is performed using the stylus pen 11 or the mouse 12, the scroll amount is calculated using the distance (movement distance) from the start point to the end point of the movement locus of the stylus pen 11 or the mouse 12 as a parameter. . If the user's screen operation is performed using the movement key 13, the amount of scrolling is calculated using the length of the pressing time of the movement key 13 as a parameter.

  The scroll direction detection unit 30 detects the scroll direction based on the scroll operation information output from the screen operation reception unit 28. For example, when the screen operation of the user is performed using the stylus pen 11 or the mouse 12, the scroll direction is detected on a straight line connecting the start point and the end point of the movement locus of the stylus pen 11 or the mouse 12. When the user performs a screen operation using the movement key 13, the scroll direction is detected according to the pressing direction of the movement key 13. The detection result of the scroll direction detection unit 30 is notified to the display control unit 21.

  Incidentally, when the lower half of the page image is displayed on the display screen from the state where the upper half of the page image is displayed on the display screen of the display unit 21, the user moves the stylus pen 11 from the lower side to the upper side on the display screen. It will be moved towards. In this case, the movement direction of the stylus pen 11 (direction from the start point to the end point) and the scroll direction of the display image are opposite to each other. Therefore, the scroll direction detection unit 30 detects the direction opposite to the movement direction of the stylus pen 11 as the scroll direction on the straight line connecting the start point and the end point of the movement locus of the stylus pen 11. Therefore, for example, when the stylus pen 11 is moved from the bottom to the top on the display screen, the scroll direction is detected downward. This also applies to the scroll operation using the mouse 12. However, in the scroll operation using the movement key 13, the pressing direction of the movement key 13 is detected as it is as the scroll direction.

  The object detection unit 31 detects an image object that exists in the scroll direction detected by the scroll direction detection unit 30. The image object is detected in the page image including the image displayed on the display screen of the display unit 22. Further, when there are a plurality of image objects in the scroll direction detected by the scroll direction detection unit 30, the image object (current display position) currently displayed on the display screen of the display unit 22 among these image objects. ) Is detected. The detection result of the object detection unit 31 is notified to the display control unit 21. The detection result of the image object includes position information indicating where the actually detected image object exists in the page image, that is, coordinate data (for example, coordinate data indicating the position of the upper left corner of the image object). included.

  The attribute extraction unit 32 extracts the attributes of the image object detected by the object detection unit 31. The attributes of the image object include the type and size of the image object. Among these, the types of image objects are classified and extracted as text, graphics, and images. In addition, the size (object size) of the image object is given as a vertical and horizontal size that partitions the image object in the page image. In addition, in the attribute information of the image object actually extracted, the attribute extraction unit 32 extracts the font size of the characters constituting the text as one of the attribute information when the type of the image object is text. To do. The extraction result of the attribute extraction unit 32 is notified to the display control unit 21.

  4 and 5 are flowcharts showing an example of image display processing performed by the information processing apparatus according to the embodiment of the present invention. First, after starting the application program 5 in accordance with a user's input operation using the input device 2, the image data selected by the user using the input device 2 is read from the storage device 4, thereby displaying image data to be displayed. Is input to the drawing command analyzer 26 (step S1). As a result, the drawing command analyzing unit 26 sequentially analyzes a plurality of drawing commands (drawing command group) constituting the input image data to thereby determine the type of each drawing command and the image object included in the page image. The analysis results including the number, the drawing position of each image object, the drawing conditions, and the like are stored on the memory in a table format or a list format, for example (step S2).

  Next, the display magnification setting unit 24 sets the display magnification when displaying the image data input in the previous step S1 on the display unit 22 (step S3). In this case, a default display magnification (for example, 100%) set in advance as an initial state is applied. However, when the default value of the display magnification is changed by the user's input operation using the input device 2, the display magnification after the setting change is applied.

  Next, the drawing area setting unit 25 sets the drawing area according to the display magnification set in the previous step S3 (step S4). In this case, the drawing area setting unit 25 displays the drawing area set in the initial state in advance, for example, the upper left corner portion of the page image in which the drawing command is analyzed and the default display magnification is applied. The drawing area is set to a size that surrounds the image portion corresponding to the display screen size in a state of being aligned with the upper left corner portion of the display screen. The drawing area is set by, for example, designating the positions of the upper left corner and the lower right corner of the drawing area in the page image using coordinate data.

  Subsequently, the image processing unit 27 performs drawing processing on the image object included in the drawing area set in the previous step S4 based on the analysis result of the drawing command performed in step S2, thereby obtaining the image object. The corresponding bitmap image is developed on the drawing memory 8 (step S5). Next, the bitmap image developed on the drawing memory 8 is displayed on the display screen of the display unit 22 in accordance with an instruction from the display control unit 21 (step S6).

  Thereafter, when the user performs any screen operation using the input device 2 during image display (when it is determined Yes in step S7), this screen operation is received by the screen operation reception unit 28 (step S8). Next, it is determined whether or not the content (type) of the screen operation received by the screen operation receiving unit 28 is a scroll operation (step S9). This determination is performed by the display control unit 21 based on operation information (magnification change operation information, scroll operation information) output (notified) from the screen operation reception unit 28. Further, when the user instructs the end of the application program 5 using the input device 2 during image display (when determined Yes in step S10), the display of the image on the display unit 22 is ended at that time ( Step S11), a series of image display processing ends.

  Here, when the content of the screen operation received in the previous step S8 is a display magnification change operation (when it is determined No in step S9), the magnification change operation output from the screen operation reception unit 29 at that time The display magnification setting unit 24 changes the display magnification setting according to the display magnification value (change value) included in the information (step S12). The display magnification value applied by the setting change is notified from the display control unit 21 to the display magnification setting unit 24. Thereafter, the processing from step S4 is repeated according to the display magnification after the setting change. Thereby, the image enlarged or reduced according to the display magnification after the setting change is displayed on the display screen of the display unit 22.

  In addition, when the content of the screen operation received in the previous step S8 is a scroll operation (when determined Yes in step S9), the scroll direction detection unit 30 detects the scroll direction (step S13). In this case, if the scroll operation information output from the screen operation accepting unit 28 is to notify that the user has moved the stylus pen 11 in the X1 direction as shown in FIG. The unit 30 detects the X2 direction opposite to the X1 direction as the pen moving direction as the scroll direction.

  Next, it is determined whether or not the automatic scroll mode is selected as the scroll mode (step S14). This determination process is performed by using the display control unit 21 to determine whether the scroll mode selected by the user in advance using the mode selection unit 23 is the automatic scroll mode. If the automatic scroll mode has been selected (when determined Yes in step S14), the object detection unit 31 detects an image object that exists in the scroll direction detected in the previous step S13 (step S15).

  When detecting an image object, coordinate data indicating the position of the image object actually detected by the object detection unit 31 is output (notified) to the display control unit 21 as one of the detection results. In the scroll direction, the image object is detected (searched) toward the edge of the page image. On the other hand, in the direction orthogonal to the scroll direction, it is possible to arbitrarily set the extent (width) of detection of the image object. Specifically, the width of the display screen can be applied. When the user performs a scroll operation using the stylus pen 11, it is also possible to detect an image object on a straight line extending from the movement start point and the movement end point of the stylus pen 11. It is also possible to adopt a configuration in which the detection width of the image object can be arbitrarily set and changed on the user side.

  Next, it is determined whether or not the automatic magnification setting mode is selected as the display magnification setting mode (step S16). This determination processing is performed by the display control unit 21 determining whether the display magnification setting mode selected by the user in advance using the mode selection unit 23 is the automatic magnification setting mode. When the automatic magnification setting mode is not selected (in other words, when the normal setting mode is selected), the process proceeds to step S19 described later. On the other hand, when the automatic magnification setting mode is selected, the attribute extraction unit 32 extracts the attributes of the image object detected in step S15 (step S17). In this case, the attribute extraction unit 32 extracts the type (text, graphics, image) and size of the image object as the attribute of the image object. If the type of the image object is text, the font size of the characters that make up this text is extracted as one piece of attribute information.

  Subsequently, by referring to a display magnification setting table (FIG. 7) prepared in advance in association with the attribute information of the image object, the display magnification setting unit 24 sets the image display magnification applied in the automatic scroll mode ( Reset) (step S18). The display magnification setting table is stored and held in a nonvolatile memory (not shown) provided in the information processing apparatus. This display magnification setting table mainly compares the size relationship between the image object size (object size) and the display screen size (screen size), and sets the display magnification value based on the comparison result. It has become. When the type of the image object is text, the display magnification value is set based on the font size of the characters constituting the text in addition to the comparison result between the object size and the screen size.

  As a specific setting example, when the type of image object is text and the object size is less than the screen size, if the font size is less than 10 points, the font size is displayed so as to be enlarged to 10 points. When the magnification is set and the font size is 10 points or more, the display magnification is set so that the image object is enlarged to the screen size. Further, when the type of the image object is text and the object size is larger than the screen size, if the font size is less than 10 points, the display magnification is set so as to enlarge the font size to 10 points, If the font size is 10 points or more, the display magnification is set so as to reduce the font size to 10 points or equivalent.

  On the other hand, when the type of image object is graphics or image, if the object size is less than the screen size, set the display magnification to enlarge the image object to the screen size, and the object size should be larger than the screen size. For example, the display magnification is set so as to reduce the image object to the screen size. An object size less than the screen size means that the vertical (vertical) size and horizontal (horizontal) size of the image object are both smaller than the display screen size. “Some” refers to the case where the vertical size, horizontal size, or both vertical and horizontal sizes of the image object are larger than the size of the display screen. Also, enlarging or reducing an image object to the screen size means that the vertical size, horizontal size, or both horizontal and vertical sizes of the image object are adjusted to the display screen size under the condition that the image object does not protrude from the display screen. (Mostly match).

  When the display magnification is set in this way, a drawing area is set by the drawing area setting unit 25 based on the display magnification (step S19). In this case, the display area setting unit 25 uses the upper left corner portion of the image object detected in step S15 as the upper left corner of the display screen of the display unit 22 in the page image to which the display magnification set in step S18 is applied. The drawing area is set to a size that surrounds the image portion equivalent to the display screen size in a state where the corner portion is aligned. Coordinate data indicating the position of the image object to be displayed (movement target) is notified from the object detection unit 31 to the drawing region setting unit 25 via the display control unit 21. The effective scroll amount in this case corresponds to the distance between the current display position and the image object position that is the scroll movement target.

  Thereafter, the process returns to step S5 to repeat the same process, thereby drawing the image object included in the drawing area set in step S19, and the bitmap image developed on the drawing memory 8 is thereby restored. It is displayed on the display screen of the display unit 22 in accordance with an instruction from the display control unit 21.

  On the other hand, when the automatic scroll mode has not been selected (in other words, when the normal scroll mode has been selected), it is determined No in step S14, so that the scroll operation output from the screen operation reception unit 28 is performed. After the scroll amount calculation unit 28 calculates the scroll amount based on the information (step S20), the process proceeds to step S19. In this case, similarly to the normal scroll processing, a drawing area is set according to the scroll direction detected in step S13 and the scroll amount calculated in step S20 without changing the display magnification, and according to the drawing area. An image is displayed on the display screen of the display unit 22.

  By performing the image display process in the above procedure, for example, as shown in FIG. 8, there are two image objects 32 and 33 in the page image 31 that forms a vertically long rectangle, and one of the image objects 32 of them. Is displayed in the frame of the display screen 34, and the user performs a scroll operation using the input device 2 to display another image object 33 in place of the currently displayed image object 32. If the user has previously selected the automatic scroll mode using the mode selection unit 23, the image object 33 can be displayed on the display screen 34 by a single scroll operation by applying the automatic scroll mode. . Further, when the user has selected the automatic magnification setting mode using the mode selection unit 23, the image object 33 is appropriately enlarged / reduced (reduced in the example in the figure) at the display position after scrolling by applying the automatic magnification setting mode. ) Will be displayed.

  As described above, in the information processing apparatus according to the embodiment of the present invention, when the user performs a scroll operation in a state in which the image object is displayed on the display screen, the other image existing in the scroll direction instructed thereby. Since the object is displayed, even an image object existing at a position away from the current display position can be displayed with a small number of operations.

  Further, since the display magnification setting unit 24 sets the display magnification of the image object based on the attribute of the image object extracted by the attribute extraction unit 32, the display magnification is set based on the attribute of the image object when scrolling. It can be set appropriately.

  Further, since the mode selection unit 23 can select whether or not the automatic scroll mode can be applied, whether or not the automatic scroll mode is applied as the scroll mode can be freely selected according to the user's own preference. .

  In addition, since the mode selection unit 23 can select whether or not the automatic magnification setting mode can be applied, the user can freely select whether to apply the automatic magnification setting mode as the magnification setting mode according to the user's own preference. be able to.

  Further, the attribute extraction unit 32 can appropriately set the display magnification according to the type and size of the image object by extracting the type and size of the image object as the attribute of the image object.

  Furthermore, by classifying and extracting image object types as text, graphics, and images, the display magnification setting conditions can be set individually depending on whether the image object type is text, graphics, or image. can do.

  In addition, when the type of the image object is text as the attribute of the image object, the display magnification can be appropriately set based on the font size by extracting the font size of the characters constituting the text.

  In the above embodiment, application to a portable information terminal is assumed. However, the present invention is not limited to this, and an information processing apparatus such as a notebook or desktop personal computer, an electronic notebook, or a cellular phone is used. Widely applicable to all.

It is a block diagram which shows the structural example of the information processing apparatus to which this invention is applied. It is the schematic which shows the external appearance of a portable information terminal. It is a block diagram which shows the functional structural example of the information processing apparatus which concerns on embodiment of this invention. It is a flowchart (the 1) which shows an example of the image display process performed with the information processing apparatus which concerns on embodiment of this invention. It is a flowchart (the 2) which shows an example of the image display process performed with the information processing apparatus which concerns on embodiment of this invention. It is a figure which shows the relationship between the moving direction of a stylus pen at the time of scroll operation, and a scroll direction. It is a figure which shows the content of the display magnification setting table referred in automatic magnification setting mode. It is a figure which shows the change of a display position when a scroll operation is performed using the information processing apparatus which concerns on embodiment of this invention, and a display magnification. Explains a problem with scrolling in the prior art

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Image processing apparatus, 2 ... Input device, 3 ... Display apparatus, 4 ... Memory | storage device, 10 ... Portable information terminal, 11 ... Stylus pen, 12 ... Mouse | mouth, 13 ... Movement key, 21 ... Display control part, 22 ... Display , 23 ... Mode selection part, 24 ... Display magnification setting part, 25 ... Drawing area setting part, 26 ... Drawing command analysis part, 27 ... Drawing processing part, 28 ... Screen operation reception part, 29 ... Scroll amount calculation part, 30 ... Scroll direction detection unit, 31 ... Object detection unit, 32 ... Attribute extraction unit

Claims (7)

Display means for displaying an image made up of one or more image objects on a display screen;
Instruction means for instructing scrolling of the image displayed on the display screen of the display means;
Detecting means for detecting the direction of scroll instructed by the instructing means;
Detecting means for detecting an image object present in the scroll direction detected by the detecting means;
An information processing apparatus comprising: display control means for controlling scrolling of an image based on positional information of the image object so that the image object detected by the detection means is displayed on the display screen. Extracting means for extracting attributes of the image object detected by the detecting means;
The information processing apparatus according to claim 1, further comprising: a setting unit that sets a display magnification of the image object based on the attribute extracted by the extraction unit. The information processing apparatus according to claim 1, further comprising: a scroll mode selection unit that selects whether or not to apply an automatic scroll mode executed by the detection unit and the display control unit. The information processing apparatus according to claim 2, further comprising: a magnification setting mode selection unit that selects whether or not an automatic magnification setting mode executed by the extraction unit and the setting unit is applicable. The information processing apparatus according to claim 2, wherein the extraction unit extracts the type and size of the image object as attributes of the image object. The information processing apparatus according to claim 5, wherein the types of the image objects are classified and extracted as text, graphics, and images. The information processing apparatus according to claim 6, wherein when the type of the image object is text, the extraction unit extracts a font size of characters constituting the text as the attribute of the image object.

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