JP2008158540A - Projector device, projecting method and projection control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily designate a desired region as an object to be enlarged in an image and to enlarge and project the region. <P>SOLUTION: When two points in a projected image are designated by operating a two-point zoom key 15b provided to a primary body main key/indicator 15, a control unit 39 sets a rectangular frame including the two designated points as diagonal vertexes. The control unit 39 discriminates an image of the set rectangular frame on the basis of a reference side for enlargement, for example, a side with a small enlargement rate, and enlarges and projects the image within the rectangular frame on the basis of the length of the discriminated side and the size of the whole image. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a projection device that projects an image such as a projector.

  Conventionally, in a projector (projection device), an image can be enlarged and projected by performing digital zoom image processing on an image signal of an image projected on a screen.

  For example, in a digital zoom of an image in a conventional projector, a target scope is displayed at a position that is the center of enlargement in the image, and the image is enlarged around the coordinates of the target scope.

There is also a method of displaying a guidance frame in an image, enlarging, reducing, moving and displaying the guidance frame to designate a region to be enlarged (Patent Document 1).
JP 2004-86277 A

  However, in image processing for enlarging an image centered on the target scope, for example, when a part of the image is to be displayed on the entire screen, enlargement is repeated several times so that the image in the desired area fits on the entire screen. Had to be executed.

  In Patent Document 1, although it is possible to specify an area by enlarging or reducing the guidance frame, the area must be specified using a guidance frame having a predetermined shape. Therefore, in order to designate a desired area, it has been necessary to repeatedly adjust the size and position of the guidance frame.

  An object of the present invention is to provide a projection device, a projection method, and a projection control program capable of easily designating a desired range as an enlargement target in an image and enlarging and projecting the corresponding range. .

  According to the first aspect of the present invention, in the projection apparatus that projects an image, an area designating unit that designates a specific area for the projected image, and a reference for enlarging the image in the area designated by the area designating unit A discriminating unit for discriminating the length, an image enlarging unit for enlarging an image in the region based on a reference length discriminated by the discriminating unit and the size of the entire image, and the image enlarging unit An enlarged image projecting means for projecting the enlarged image is provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the area designating unit is designated by a plurality of positions.

  According to a third aspect of the present invention, there is provided a projection device for projecting an image, a position designating unit for designating two positions on the projected image, and two points designated by the position designating unit as diagonal vertices. A setting means for setting a rectangular frame, a determination means for determining a reference side for enlarging the image of the rectangular frame set by the setting means, a length of the side determined by the determination means, and the entire image An image enlarging means for enlarging the image in the rectangular frame based on the size and an enlarged image projecting means for projecting the image enlarged by the image enlarging means.

  According to a fourth aspect of the present invention, in the first or third aspect of the present invention, the determining unit determines the side with a smaller enlargement ratio when the image is enlarged by the image enlarging unit. And

  Invention of Claim 5 has the reference | standard setting means which sets which side used as the reference | standard at the time of enlarging an image by the said image expansion means in the invention of Claim 1 or Claim 3, The discriminating means discriminates as a reference for enlarging the side set by the reference setting means.

  According to a sixth aspect of the present invention, in the first aspect of the invention, the position designation means includes a first designation means that designates a position of the first point, and the first designation that is designated by the first designation means. First determining means for determining the position of the point, second specifying means for specifying the position of the second point, and second determining means for determining the position of the second point specified by the second specifying means And two points when both the first point and the second point are determined by the first determination unit and the second determination unit are set as designated positions.

  According to a seventh aspect of the invention, in the first aspect of the invention, the region designating unit is detected by a trajectory detecting unit that detects a trajectory designated by a laser beam with respect to the projected image, and the trajectory detecting unit. An area discriminating unit that discriminates the specific area based on a trajectory.

  The invention according to claim 8 is the invention according to claim 7, further comprising an imaging unit that captures the projected image, wherein the trajectory detection unit is designated by the laser light from the image captured by the imaging unit. A trajectory is detected.

  According to a ninth aspect of the present invention, in the third aspect of the present invention, the position specifying means specifies the positions of two points indicated by the laser beam with respect to the projected image.

  A tenth aspect of the invention includes the image pickup means for picking up a projected image according to the ninth aspect of the invention, wherein the position specifying means is specified by the laser light from an image taken by the image pickup means. It is characterized by detecting the position of two points.

  The invention according to claim 11 is a projection method for projecting an image, wherein an area designating step for designating a specific area for the projected image, and a reference for enlarging the image in the area designated by the area designating step. A discrimination step for discriminating the length, an image enlargement step for enlarging an image in the region based on the reference length discriminated in the discrimination step and the size of the entire image, and the image enlargement step. And an enlarged image projecting step for projecting the enlarged image.

  According to a twelfth aspect of the present invention, in the projection method for projecting an image, a position designating step for designating the positions of two points with respect to the projected image, and two points designated by the position designating step are used as diagonal vertices A setting step for setting a rectangular frame, a determination step for determining a reference side for enlarging the image of the rectangular frame set by the setting step, a length of the side determined by the determination step, and the entire image An image enlarging step for enlarging the image in the rectangular frame based on the size, and an enlarged image projecting step for projecting the image magnified by the image enlarging step.

  According to a thirteenth aspect of the present invention, there is provided a computer mounted on a projection device that projects an image, a region designating unit that designates a specific region for the projected image, and a region within the region designated by the region designating unit. A discriminating unit for discriminating a length as a reference for enlarging an image; an image enlarging unit for enlarging an image in the region based on the reference length discriminated by the discriminating unit and the size of the entire image; It is made to function as an enlarged image projection means which projects the image enlarged by the said image enlargement means.

According to a fourteenth aspect of the present invention, there is provided a computer mounted on a projection device that projects an image, a position designating unit that designates the position of two points with respect to the projected image, and the two points designated by the position designating unit. A setting means for setting a rectangular frame having a vertex of the diagonal, a determination means for determining a reference side for enlarging an image of the rectangular frame set by the setting means, and a side of the edge determined by the determination means Based on the length and the size of the entire image, the image enlargement means for enlarging the image in the rectangular frame and the enlargement image projection means for projecting the image enlarged by the image enlargement means are characterized.

  According to the first, eleventh and thirteenth aspects of the present invention, a region indicating a range to be enlarged (zoomed) in a projected image is set by designating, and is used as a reference for enlarging the image in that region. Since the length is determined and enlarged based on the length and the size of the entire image, when the user intends to enlarge a specific range in the entire image, the user can easily select a desired range as an enlargement target in the image. It is possible to directly project and enlarge and project an image in the corresponding range.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the area to be enlarged can be designated by the position of a plurality of points.

  According to the third, twelfth, and fourteenth aspects of the present invention, the rectangular frame indicating the range to be enlarged (zoomed) in the projected image is set by designating two points in response to a request from the user. Since the image within the rectangular frame is enlarged based on one of the sides of the rectangle and the size of the entire image, the user simply determines two points when attempting to enlarge a specific range within the entire image. Therefore, it is possible to simply and directly specify a desired range as an enlargement target in the image, and to enlarge and project the image in the corresponding range.

  According to the invention described in claim 4, in addition to the effect of the invention of claim 1 or claim 3, the length of this side and the size of the entire image are defined on the basis of the side where the enlargement ratio when the image is enlarged is reduced. By enlarging the image in the range specified by the rectangular frame based on the above, it is possible to project the image so as to include the entire enlarged image.

  According to the invention of claim 5, in addition to the effect of the invention of claim 1 or claim 3, the side used as a reference when enlarging the image, for example, the side where the enlargement ratio when enlarging the image is small Or by making it possible to set in advance which of the sides to increase the enlargement ratio to allow the user to project a desired form, for example, the entire enlarged image, or a part in a rectangular frame Although the range is not projected, switching such that the central image is enlarged and projected is possible.

  According to the invention of claim 6, in addition to the effect of the invention of claim 3, two points defining a rectangular frame indicating the image range to be enlarged can be individually designated, so that the point position can be simplified. It is possible to specify a desired image range to be enlarged.

  According to the seventh aspect of the invention, in addition to the effect of the first aspect of the invention, a locus designated by a laser beam from a device independent of the apparatus main body, such as a laser pointer, for the projected image is detected. Thus, an area indicating the image range to be enlarged can be set.

  According to the eighth aspect of the invention, in addition to the effect of the seventh aspect of the invention, the trajectory designated by the laser beam for the projected image can be detected by image processing for the photographed image.

  According to the ninth aspect of the invention, in addition to the effect of the third aspect of the invention, even when the position of the projected image is designated by light, for example, a laser pointer, the position designated by the laser pointer is determined. It is possible to detect and set a rectangular frame indicating an image range to be enlarged.

  According to the invention of claim 10, in addition to the effect of the invention of claim 9, the positions of the two designated points are detected by capturing the projected image. Even if the position is designated by an independent position indicating means (device), the designated position can be detected.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating an external configuration of a projector apparatus 10 according to the present embodiment. The projector device 10 according to the present embodiment inputs a signal of an image (video) to be projected from another device (such as a personal computer) and projects it on a screen, and arbitrarily sets two points on the projected image. By designating, an image within the range defined by these two points can be enlarged and projected.

  As shown in FIG. 1A, a projection lens 12, a photographing lens 13, and an Ir receiver 14 are disposed on the front surface of a rectangular parallelepiped main body casing 11.

  The projection lens 12 is for projecting a light image formed by a spatial light modulation element such as a micromirror element to be described later. Here, the focus position and the zoom position (projection angle of view) can be arbitrarily changed. Shall.

  The photographing lens 13 is for photographing an image projected through the projection lens 12.

The Ir receiver 14 receives infrared light on which a key operation signal from a remote controller of the projector device 10 (not shown) is superimposed.
A main body main key / indicator 15, a speaker 16, and a cover 17 are disposed on the upper surface of the main body casing 11.

Details of the main body main key / indicator 15 will be described later.
The speaker 16 outputs a sound when a moving image is reproduced.
The cover 17 opens and closes when a subkey (not shown) is operated. The sub key operates various operations that cannot be set by the main key / indicator 15 without using a remote controller of the projector 10 (not shown).

Further, as shown in FIG. 1B, an input / output connector portion 18, an Ir receiving portion 19, and an AC adapter connecting portion 20 are disposed on the back surface of the main body casing 11.
The input / output connector unit 18 includes, for example, a USB terminal for connection with an external device such as a personal computer, a mini D-SUB terminal for video input, an S terminal, an RCA terminal, a stereo mini terminal for audio input, and the like. Become.

Similar to the Ir receiver 14, the Ir receiver 19 receives infrared light on which a key operation signal from a remote controller (not shown) is superimposed.
The AC adapter connection unit 20 connects a cable from an AC adapter (not shown) serving as a power source.

  In addition, a pair of fixed leg portions 21 and 21 are attached to the lower surface of the main body casing 11 on the back side, and an adjustment leg portion 22 capable of height adjustment is attached to the front side. The adjustment leg portion 22 can be expanded and contracted by rotating the screw, and the vertical component of the projection direction of the projection lens 12, that is, the elevation angle can be adjusted by expanding and contracting.

  Next, FIG. 2A illustrates a detailed arrangement configuration of the main body main key / indicator 15. The main body main key / indicator 15 includes a power key 15a, a two-point zoom key 15b, a focus key 15c, an “AFK” key 15d, an “Input” key 15e, an “Auto” key 15f, "Menu" key 15g, "Keystone" key 15h, "HELP" key 15i, "Esc" key 15j, "Up (↑)" key 15k, "Down (↓)" key 15l, "Left (←)" key 15m , A “light (→)” key 15n, an “Enter” key 15o, a power / standby indicator 15p, and a temperature (TEMP) indicator 15q.

The power key 15a instructs on / off of the power.
The two-point zoom key 15b designates two points (target pointers 1 and 2) that define a range to be magnified (zoomed up) in the image projected on the screen, and instructs execution of enlargement processing corresponding to these two points. .

The focus key 15c instructs to move the in-focus position forward and backward by the operation of “Δ” and “▽”.
The “AFK” key 15d instructs immediate execution of automatic focus and automatic keystone correction.

  An “Input” key 15 e instructs manual switching of an image signal input to any of the input / output connector sections 18, and an “Auto” key 15 f is an image signal input to any of the input / output connector sections 18. Directs automatic switching.

The “menu” key 15g instructs display of various menu items relating to the projection operation, and the “Keystone” key 15h instructs manual operation of keystone correction.
The “HELP” key 15i instructs display of various help information when the instruction operation is unknown, and the “Esc” key 15j instructs release of the operation at that time.

  The “up” key 15k, “down” key 15l, “left” key 15m, and “right” key 15n are so-called cursor keys, which are selected at that time such as menu items, manual keystone correction directions, target pointers and cursors, Operate according to the direction of movement.

The power / standby indicator 15p displays a power on / off state and a state in which no image signal is input, for example, by turning on / off or blinking green and red LEDs.
The temperature indicator 15q displays whether or not the temperature of a lamp serving as a light source for image projection is in a state suitable for projection, for example, by turning on / off or blinking green and red LEDs.

  FIG. 2B shows the two-point zoom key 15b in the second embodiment, and designates the positions of two points (target pointers 1 and 2) that define a range to be enlarged (zoomed up) in the image. There are provided a pointer 1 key 15b1 and a pointer 2 key 15b2 corresponding to each.

  Next, the functional configuration of the electronic circuit of the projector apparatus 10 will be described with reference to FIG. In FIG. 3, image signals of various standards input from the input / output connector unit 18 are unified into image signals of a predetermined format by the image processing unit 32 via the input / output interface (I / F) 31 and the system bus SB. Is sent to the display encoder 33.

  When the image processing unit 32 is instructed to perform image processing by an operation on a key provided on the main body main key / indicator 15, the image processing unit 32 performs image processing corresponding to the instruction on the image signal. For example, the image processing unit 32 is provided with a zoom processing unit 32a that enlarges (zooms) an image according to the positions of two points designated on the image by an operation on the two-point zoom key 15b. In addition, the image processing unit 32 also executes image processing such as keystone correction by operating the “AFK” key 15d.

  The display encoder 33 develops and stores the transmitted image signal in the video RAM 34, generates a video signal from the stored contents of the video RAM 34, and outputs the video signal to the display drive unit 35.

  The display driving unit 35 drives and displays the spatial light modulation element (SOM) 36 at an appropriate frame rate, for example, 30 [frames / second] corresponding to the transmitted image signal. 36 is irradiated with high-intensity white light emitted from a light source lamp 37 such as an ultra-high pressure mercury lamp, so that an optical image is formed by the reflected light and projected onto a screen (not shown) via the projection lens 12. Is done.

However, the projection lens 12 appropriately moves the zoom position and the focus position by driving the lens motor (M) by the zoom drive unit 38.
The control unit 39 controls all the operations of each circuit and has a function corresponding to a computer. The control unit 39 is composed of a CPU, a ROM in which an operation program executed by the CPU is fixedly stored, a RAM used as a work memory, and the like. The control unit 39 controls an image projection operation including image enlargement described later by executing a projection control program stored in the ROM.

The control unit 39 is connected to the image storage unit 40, the sound processing unit 41, the photographing unit 42, and the communication unit 43 via the system bus SB.
The image storage unit 40 is composed of, for example, a flash memory, and stores image adjustment menus and image data of a user logo image, which will be described later. These images are projected and displayed by the projection lens 12.

The sound processing unit 41 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection display operation into an analog signal, and drives the speaker 16 to emit a loud sound.
The photographing unit 42 photographs an image projected on the screen through the photographing lens 13, and detects a point designated by a laser pointer 50 described later from the photographed image (third embodiment).

  The communication unit 43 controls near field communication and performs communication with a laser pointer 50 described later. The communication unit 43 receives from the laser pointer 50 (described later) a request for detecting a position designated on the screen by laser light.

  Although not shown, the projector device 10 projects a detection unit (acceleration sensor) that detects vibration when the installation state is changed, and an image necessary for automatic focusing and automatic keystone correction. A side distance processing unit that measures the distance to the screen, an illuminance detection unit that detects the illuminance around the projector apparatus 10 is provided.

  The main body main key / indicator 15 and the main body subkey provided in the cover 17 constitute a key / indicator unit 45, and a key operation signal in the key / indicator unit 45 is directly input to the control unit 39. While the power / standby indicator 15p and the temperature indicator 15q are directly lit / flashed, the infrared light reception signals from the Ir receiver 14 and the Ir receiver 19 are also directly input to the controller 39.

  FIG. 3 shows a configuration of a laser pointer 50 that can point an arbitrary point in an image projected on the screen by the projector device 10 with a laser beam. The laser pointer 50 is used when designating an arbitrary position in the image projected on the screen in the third embodiment to be described later.

The laser pointer 50 is provided with a button 51, a control unit 52, an input control unit 53, a laser beam output unit 54, and a communication unit 55. The button 51 is operated to instruct the output of the laser beam. Assume that one button and a second button for instructing confirmation are included. It is assumed that the first button can be pressed in two stages. For example, the laser beam output is instructed by pressing at the first stage level (half press), and the position detection on the screen instructed by the laser beam is further performed by pressing at the second stage level (full press). Shall be instructed.

  The control unit 52 controls the laser pointer 50. The control unit 52 acquires the input operation state of the input operation on the button 51 from the input control unit 53, outputs the laser light from the laser light output unit 54, and the projector device 10 by the communication unit 55. Controls communication with the other.

  The input control unit 53 detects an operation on the button 51, and detects the first button being pressed (half-pressed) at the first level and the second button (full-pressed). To the control unit 52.

  The laser light output unit 54 emits laser light when the button 51 is pressed (half pressed) at the first level under the control of the control unit 52.

  The communication unit 55 controls communication with the projector device 10 under the control of the control unit 52, and is output from the laser light output unit 54 to the projector device 10 when the button 51 is fully pressed. The position detection request indicated by the laser beam is transmitted. Further, when the second button is pressed, a confirmation instruction is transmitted to the projector device 10.

(First embodiment)
Next, the operation of the projector apparatus 10 in the first embodiment will be described with reference to the flowchart shown in FIG.

  Assume that the projector apparatus 10 receives an image signal from, for example, a personal computer via the input / output connector unit 18 and projects an image corresponding to the image signal on a screen. The remote controller also has the same keys as the main body, and the same operation can be performed from the remote controller.

  Here, when the two-point zoom key 15b is operated (step A1), the control unit 39 displays the target pointer 1 at an initially set position of the projected image (step A2).

  For example, the rectangular frame indicating the enlargement range is defined by two points of the upper left and lower right diagonal vertices, and the default position for the target pointer 1 is the upper left vertex of the rectangular frame. In order to easily determine the position, it is assumed that the position is set to any one of the upper left quarter of the entire image.

  Here, when the cursor keys ("Up" key 15k, "Down" key 15l, "Left" key 15m, "Right" key 15n) are operated by the user, the control unit 39 responds to the operated key. Then, the position of the target pointer 1 is moved (step A3). Here, the position of the target pointer 1 can be arbitrarily adjusted in order to determine the range to be enlarged.

  When the “Enter” key 15o is operated after the position is adjusted with respect to the target pointer 1 (step A4, Yes), the control unit 39 sets the coordinates (X1, Y1) of the target pointer 1 at this time. The data is stored in the memory, and the position of the target pointer 1 is determined (step A5).

  Next, the control unit 39 displays the target pointer 2 at an initial position of the projected image (step A6). The position initially set for the target pointer 2 is set to one of the lower right quarters of the entire image so that the lower right vertex position of the rectangular frame can be easily determined. .

  Here, as in the case of the target pointer 1, when the cursor keys ("up" key 15k, "down" key 151, "left" key 15m, "right" key 15n) are operated by the user, the control unit 39 moves the position of the target pointer 2 in accordance with the operated key (step A7). Here, the position of the target pointer 2 can be arbitrarily adjusted in order to determine the range to be enlarged.

  FIG. 5 shows an example of enlarging (zooming) an image by designating target pointers 1 and 2 for the image projected on the screen.

  FIG. 5A shows a state in which a rectangular frame defined by these two points is set by specifying the target pointers 1 and 2. The control unit 39. A mark indicating the target pointers 1 and 2 and a rectangular frame are added to the projected image so that the range of the image to be enlarged can be easily grasped. This rectangular frame is deformed as the position of the target pointer 2 is adjusted.

  By setting a rectangular frame as shown in FIG. 5A, as shown in FIG. 5B, the image in the rectangular frame is enlarged (zoomed) so as to match the size (X, Y) of the entire image. ). This is a case where the aspect ratio of the rectangular frame defined by the two points is defined with substantially the same aspect ratio as the size (X, Y) of the entire image.

  When the “Enter” key 15o is operated after the position is adjusted with respect to the target pointer 2 (step A8, Yes), the control unit 39 sets the coordinates (X2, Y2) of the target pointer 2 at this time. The data is stored in the memory, and the position of the target pointer 2 is determined (step A9).

  In this way, two points indicating the range of the image to be enlarged can be designated and a rectangular frame can be set.

  Next, based on the coordinates (X1, Y1) (X2, Y2) of the two points stored in the memory, the control unit 39 is parallel (horizontally) to the X axis in the rectangular frame having the two points as diagonal vertices. ) Side length X3 and side length Y3 parallel (perpendicular) to the Y axis are obtained (step A10).

  Then, for each of the horizontal side and the vertical side of the rectangular frame, an enlargement ratio when enlarging to the size of the entire image is calculated. That is, the enlargement ratio A = X / X3 in the horizontal direction and the enlargement ratio B = Y / Y3 in the vertical direction are calculated (step A11).

  Next, the control unit 39 compares the enlargement ratio A and the enlargement ratio B, and when “A ≦ B”, that is, when the horizontal enlargement ratio A is equal to or smaller than the vertical enlargement ratio B. Is enlarged A times by the zoom processing unit 32a of the image processing unit 32 according to the enlargement factor A which is smaller in both the vertical and horizontal directions with respect to the image in the rectangular frame indicated by the target pointers 1 and 2 ( Step A13).

  On the other hand, as a result of comparing the enlargement ratio A and the enlargement ratio B, when “A ≦ B” is not satisfied, that is, when the horizontal enlargement ratio A is larger than the vertical enlargement ratio B, the image processing unit 32. The zoom processing unit 32a causes the image in the rectangular frame indicated by the target pointers 1 and 2 to be enlarged B times in both the vertical and horizontal directions according to the enlargement factor B with the smaller enlargement factor (step A14).

  Then, the control unit 39 develops and stores the image enlarged by the zoom processing unit 32a in the video RAM 34 through the display encoder. Thereby, an enlarged image of a rectangular range defined by two points is projected onto the screen (step A15).

FIG. 6 is a diagram for explaining the difference between the vertical and horizontal enlargement ratios of the rectangular frame defined by two points.
FIG. 6A1 shows a case where a vertically long rectangular frame is set by specifying the target pointers 1 and 2. FIG. In this case, since the enlargement ratio B in the vertical direction is smaller than the enlargement ratio A in the horizontal direction, the enlargement process is performed on the image in the rectangular frame with the enlargement ratio B. FIG. The image is enlarged and projected as shown in FIG.

  FIG. 6B1 shows a case where a horizontally long rectangular frame is set by specifying the target pointers 1 and 2. In this case, since the enlargement ratio A in the horizontal direction is smaller than the enlargement ratio B in the vertical direction, enlargement processing is executed on the image in the rectangular frame with the enlargement ratio A, and FIG. The image is enlarged and projected as shown in FIG.

  As shown in FIGS. 6 (a2) and (b2), the enlarged image is projected on the screen in the center. In this case, the entire image in the range (within the rectangular frame) designated by the user at two points is projected.

  In the above description, the image is enlarged based on the side of the rectangular frame indicating the range to be enlarged, which has a smaller enlargement ratio when the image is enlarged, but the image is enlarged. It may be possible to set in advance whether the side to be used as a reference is a side where the enlargement rate when the image is enlarged is reduced or a side where the enlargement rate is increased.

  For example, a setting process is started from a menu displayed by operating the “menu” key 15g, and in this setting process, a request from a user is input, or a side or an enlargement ratio that reduces the enlargement ratio when the image is enlarged Set one of the sides where becomes larger.

  The control unit 39 switches the determination process in step A12 according to this setting. That is, when the side where the enlargement ratio is small is used as a reference, as described above, “A ≦ B” is determined in step A12, and when the side where the enlargement ratio is high is used as a reference, “A> B ”is discriminated. Here, in the case of “A> B”, the image in the rectangular frame designated by the target pointers 1 and 2 is enlarged by A times both vertically and horizontally.

  FIG. 7 is a diagram for explaining enlargement of an image when a side where the enlargement ratio is large is used as a reference.

  FIG. 7 (a1) shows a case where a vertically long rectangular frame is set by the designation of the target pointers 1 and 2, similarly to FIG. 6 (a1). In this case, since the enlargement ratio A in the horizontal direction is larger than the enlargement ratio B in the vertical direction, enlargement processing is executed on the image in the rectangular frame by the enlargement ratio A, and FIG. The image is enlarged and projected as shown in FIG.

  FIG. 7B1 shows a case where a horizontally long rectangular frame is set by the designation of the target pointers 1 and 2, similarly to FIG. 6B1. In this case, since the enlargement ratio B in the vertical direction is larger than the enlargement ratio A in the horizontal direction, enlargement processing is executed on the image in the rectangular frame with the enlargement ratio B, and FIG. The image is enlarged and projected as shown in FIG.

  In this case, if the image in the rectangular frame is enlarged, it exceeds the size (X, Y) of the whole image, so a range corresponding to the size (X, Y) of the whole image at the center of the enlarged image is extracted. Project as an enlarged image.

  In this way, when the range to be enlarged is designated by two points by enlarging the image with reference to the side where the enlargement ratio when enlarging the image is large, the desired image portion is designated strictly. Even if it is not, a desired enlarged image can be projected by designating that the image portion is positioned substantially in the center.

  In the above description, regarding the rectangular frame indicating the range to be enlarged, the position of the upper left vertex is indicated by the target pointer 1 and the position of the lower right vertex is indicated by the target pointer 2, but the position of the target pointer 1 is designated. Thereafter, depending on the position of the target pointer 2, the lower right vertex can be designated by the target pointer 1 and the upper left vertex can be designated by the target pointer 2.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. The projector device 10 of the second embodiment has a configuration in which the main body main key / indicator 15 is provided with a two-point zoom key 15b as shown in FIG. 2B, and the target pointer described in the first embodiment. 1 and 2 can be individually designated by operating the pointer 1 key 15b1 (first designation means) and the pointer 2 key 15b2 (second designation means) provided in correspondence with each other. The remote controller also has the same keys as the main body, and the same operation can be performed from the remote controller.

  Hereinafter, the operation of the projector apparatus 10 in the second embodiment will be described with reference to the flowchart shown in FIG.

  Assume that the projector apparatus 10 receives an image signal from, for example, a personal computer via the input / output connector unit 18 and projects an image corresponding to the image signal on a screen.

  Here, when enlarging (zooming) the image, any one of the pointer 1 key 15b1 and the pointer 2 key 15b2 provided on the two-point zoom key 15b is arbitrarily operated to specify the target pointer 1 or the target pointer 2. Can be operated.

  For example, when the pointer 1 key 15b1 of the two-point zoom key 15b is operated (step B1, pointer 1), the control unit 39 sets “0” indicating unspecified to the variable P2 indicating the specified state of the target pointer 2. Setting is made (step B2), and the target pointer 1 is blinked and displayed at an initially set position (same as in the first embodiment) of the projected image (step B3).

  Here, when the cursor keys ("Up" key 15k, "Down" key 15l, "Left" key 15m, "Right" key 15n) are operated by the user, the control unit 39 responds to the operated key. The position of the target pointer 1 is moved, and the coordinates (X1, Y1) of the movement destination are stored in the memory as needed (step B4). Here, the position of the target pointer 1 can be arbitrarily adjusted in order to determine the range to be enlarged.

  When the pointer 2 key 15b2 is operated during the adjustment of the position of the target pointer 1 (step B5, Yes), the control unit 39 indicates “undesignated” for the variable P1 indicating the designated state of the target pointer 1. 0 "(step B8), and the target pointer 2 is blinked and displayed at an initially set position of the projected image (same as in the first embodiment) (step B9).

  Here, when the cursor keys ("Up" key 15k, "Down" key 15l, "Left" key 15m, "Right" key 15n) are operated by the user, the control unit 39 responds to the operated key. The position of the target pointer 2 is moved, and the coordinates (X2, Y2) of the movement destination are stored in the memory as needed (step B10). Here, the position of the target pointer 2 can be arbitrarily adjusted in order to determine the range to be enlarged.

  If the pointer 1 key 15b1 is operated during the adjustment of the position of the target pointer 2, the position of the target pointer 1 can be adjusted in the same manner as described above. That is, the positions of the target pointers 1 and 2 can be individually designated by operating the pointer 1 key 15b1 and the pointer 2 key 15b2.

  On the other hand, after the position is adjusted with respect to the target pointer 1 (step B4), when the “Enter” key 15o is operated (step B6, Yes), the control unit 39 indicates that the variable P1 has been designated. It is set to “1” shown (step B7). Here, the control unit 39 determines whether or not the variable P2 is set to “1”, that is, whether the positions of both the target pointers 1 and 2 are determined (step B19). Here, when the variable P2 is “0”, the process proceeds to step B9, and the position with respect to the target pointer 2 is designated.

  Similarly, after the position is adjusted with respect to the target pointer 2 (step B10), when the “Enter” key 15o is operated (step B12, Yes), the control unit 39 designates the variable P2. It is set to “1” indicating completion (step B13). Here, the control unit 39 determines whether the variable P1 is set to “1”, that is, whether the positions of both the target pointers 1 and 2 have been determined (step B14). Here, when the variable P1 is “0”, the process proceeds to step B3, and the position with respect to the target pointer 1 is designated.

  Thus, when the variables P1 and P2 are both “1” and the positions of both the target pointers 1 and 2 are determined (step B14, B19, Yes), the control unit 39 stores the coordinates of the two points stored in the memory. Based on (X1, Y1) (X2, Y2), the length X3 of the side parallel to the X axis (horizontal) in the rectangular frame with two points as diagonal vertices, and parallel (vertical) to the Y axis The side length Y3 is obtained (step B15).

  Then, for each of the horizontal side and the vertical side of the rectangular frame, an enlargement ratio when enlarging to the size of the entire image is calculated. That is, the horizontal enlargement ratio A = X / X3 and the vertical enlargement ratio B = Y / Y3 are calculated (step B16).

  The control unit 39 causes the zoom processing unit 32a of the image processing unit 32 to enlarge the image within the rectangular frame indicated by the target pointers 1 and 2 by A times in the horizontal direction and B times in the vertical direction (step). B17).

  Then, the control unit 39 develops and stores the image enlarged by the zoom processing unit 32a in the video RAM 34 through the display encoder. Thereby, an enlarged image of a rectangular range defined by two points is projected on the screen (step B18).

  In this way, in the second embodiment, since the target pointers 1 and 2 that define the rectangular frame indicating the image range to be enlarged can be individually specified, the point position can be easily adjusted to enlarge the object. A desired image range can be designated.

  In the second embodiment, the two-point zoom key 15b is provided with two keys, a pointer 1 key 15b1 and a pointer 2 key 15b2. However, one target designates the target pointer 1 and one designates the target pointer 2. It is good also as a structure switched and used for a case.

  In step B17, the enlargement process is executed for each of the vertical direction and the horizontal direction using the separately calculated magnifications A and B. However, as in the first embodiment, the enlargement process is performed in either direction. The image may be enlarged according to the enlargement rate.

  In the first and second embodiments described above, the position of the image projected on the screen is specified using the main body main key / indicator 15. By providing a display device that displays an image projected on a screen, such as a liquid crystal display, and a touch sensor (tablet) that is integrated with the display screen of the display device, the position is designated by an operation on the touch sensor. You may comprise as follows.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In the first and second embodiments, two points indicating a range to be enlarged are designated by an operation on a key provided on the main body main key / indicator 15 and an operation from a remote controller, but the third embodiment Then, for the image projected on the screen by the laser pointer 50, the positions of two points indicating the range to be enlarged are directly designated by the laser beam.

  Hereinafter, the operation of the projector apparatus 10 in the third embodiment will be described with reference to the flowchart shown in FIG.

  Assume that the projector apparatus 10 receives an image signal from, for example, a personal computer via the input / output connector unit 18 and projects an image corresponding to the image signal on a screen. The image projected on the screen can be irradiated with laser light by operating (half-pressing) the button 51 (first button) of the laser pointer 50, and the position can be arbitrarily designated.

  Here, when enlarging (zooming) an image, the button 51 (first button) of the laser pointer 50 is fully pressed in a state where the irradiation position of the laser beam is positioned so as to indicate the range of the image to be enlarged. . In this case, the control unit 52 of the laser pointer 50 is notified of the full press operation of the first button from the input control unit 53, and in response thereto, the laser light output from the laser light output unit 54 to the projector device 10. The communication unit 55 transmits a request for detecting the designated position (pointer detection request).

  When the projector device 10 receives a pointer detection request from the laser pointer 50 through the communication unit 43 (step C1), the projector device 10 performs a pointer detection process for detecting the position on the screen instructed by the laser light from the laser pointer 50. Execute (Step C2). That is, the screen on which the image is projected is photographed (scanned) by the photographing unit 42, and the position irradiated with the laser light is detected.

  For example, the shape when the laser beam from the laser pointer 50 is irradiated onto the screen is determined in advance as a specific shape, and the corresponding shape is extracted from the image photographed by the photographing unit 42 by image processing. The position indicated by the laser beam can be detected. In addition, the laser light may be a specific color, and the position indicated by the laser light may be detected based on this color. Further, the photographing unit 42 is configured to capture an image by inputting only the light having the wavelength of the laser beam from the laser pointer 50, and detect the position indicated by the laser beam from the image. good.

  When the control unit 39 detects the position designated by the laser pointer 50 (step C3), which position in the image is designated based on the relationship between this position and the position in the image projected on the screen. And the target pointer 1 blinks at the corresponding position (step C4).

  Here, the position of the target pointer 1 can be arbitrarily changed by performing the same operation as described above on the button 51 (first button) (steps C1 to C4).

  On the other hand, when the operation of pressing the second button of the button 51 is performed, the control unit 52 is notified from the input control unit 53 that there has been an operation on the second button, and accordingly, the projector device 10 is notified. Send confirmation instructions.

  When the projector device 10 receives the confirmation instruction from the laser pointer 50 through the communication unit 43 (step C5), the projector device 10 determines whether or not the variable P indicating the specified state of the target pointer 1 is set to “1” indicating that it has been specified. (Step C6). Note that the initial state of the variable P is set to “0”.

  If the variable P is not “1”, the control unit 39 stores the coordinates (X1, Y1) of the target pointer 1 at this time in the memory and determines the position of the target pointer 1 (step C7). ). The control unit 39 adds and displays a mark indicating the target pointer 1 in the image projected on the screen. (Step C8). Then, the variable P is set to “1” to indicate that the target pointer 1 has been designated (step C9).

  Next, in the same manner as described above, the position of the target pointer 2 indicated by the laser beam is detected by a full pressing operation on the button 51, and the target pointer 2 is blinked and displayed at the corresponding position (step C4). Here, when the confirmation instruction is received by the operation of the button 51 on the second button (step C5), it is determined whether or not the variable P indicating the specified state of the target pointer 1 is set to “1” indicating that it has been specified. (Step C6).

  In this case, since the variable P is set to “1”, the control unit 39 stores the coordinates (X2, Y2) of the target pointer 2 at this time in the memory and determines the position of the target pointer 2 ( Step C10).

  Thus, when the positions indicated by the laser light from the laser pointer 50 are set as the target pointers 1 and 2 and the coordinates (X1, Y1) (X2, Y2) of the respective positions are detected, in steps C11 to C14, The same processing as steps B15 to B18 in the second embodiment is executed to enlarge and project an image within a rectangular frame designated by two points.

  In this manner, in the third embodiment, the main body main key / indicator 15 provided in the projector apparatus 10 is not operated, and is configured independently of the apparatus main body at a position away from the projector apparatus 10. By only operating the laser pointer 50, it is possible to specify two points for the image projected on the screen, set a rectangular frame indicating the image range to be enlarged, and enlarge and project the image.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. In the third embodiment, for the image projected on the screen by the laser pointer 50, the positions of two points indicating the range to be enlarged are directly specified by the laser beam. In the fourth embodiment, the laser pointer is designated. Based on the locus projected on the screen 50, the positions of two points indicating the range to be enlarged are set.

  Hereinafter, the operation of the projector apparatus 10 in the fourth embodiment will be described with reference to the flowchart shown in FIG.

  Assume that the projector apparatus 10 receives an image signal from, for example, a personal computer via the input / output connector unit 18 and projects an image corresponding to the image signal on a screen. The image projected on the screen can be irradiated with laser light by operating (half-pressing) the button 51 (first button) of the laser pointer 50, and the position can be arbitrarily designated.

  Here, when enlarging (zooming) an image, the position to which the laser beam is irradiated is moved so as to indicate the range of the image to be enlarged while pressing the button 51 (first button) of the laser pointer 50 fully. Let

  In this case, the control unit 52 of the laser pointer 50 is notified of the full press operation of the first button from the input control unit 53, and in response thereto, the laser light output from the laser light output unit 54 to the projector device 10. The communication unit 55 transmits a request for detecting the designated position (pointer detection request). The pointer detection request is continuously transmitted while the button 51 (first button) is fully pressed.

  When the projector device 10 receives a pointer detection request from the laser pointer 50 through the communication unit 43 (step D1), the projector device 10 performs a pointer detection process for detecting the position on the screen instructed by the laser beam from the laser pointer 50. Execute (Step D2). That is, the screen on which the image is projected is photographed (scanned) by the photographing unit 42, and the position irradiated with the laser light is detected. The detection of the position irradiated with the laser light may be executed in the same manner as in the third embodiment.

  In the fourth embodiment, the position of the laser beam moved so as to indicate the range of the image to be magnified, that is, the locus of the laser beam is detected while the button 51 is fully pressed (pointer detection). While the request is being received, the detection of the position indicated by the laser beam is continued.

  When the control unit 39 detects the position indicated by the laser pointer 50, it sequentially records the position indicating the locus of the detected laser beam (steps D2 and D3).

  When the full pressing operation of the button 51 is finished and no pointer detection request is received, the control unit 39 determines that the designation of the range of the image to be enlarged is finished (Step D3, Yes).

  The control unit 39 sets a rectangular frame indicating the range of the image to be enlarged based on the stored laser beam trajectory (step D4). In the present embodiment, as a method for specifying a position indicating the range of an image to be enlarged, for example, as shown in FIG. 11A, a first specification is made using a trajectory having two diagonal points of a rectangular frame as starting points and ending points. It is assumed that any one of the first method and the second method specified by a trajectory surrounding a region circumscribed by the rectangular frame is used, as shown in FIG.

  When the first method is used, the control unit 39 is based on the laser beam trajectory as shown in FIG. Set. When the second method is used, the control unit 39 sets a rectangular frame circumscribing the region surrounded by the locus based on the locus of the laser beam as shown in FIG. Each side constituting the rectangular frame is set to be parallel to the X axis or the Y axis.

  Note that the locus of the laser beam shown in FIG. 12A surrounds the region by partially intersecting (or contacting), but the rectangular frame is set even when the locus does not intersect (or contact). To be able to. For example, the rectangular frame may be set by a line segment parallel to the Y axis with the maximum and minimum X coordinates touching the locus of the laser beam and a line segment parallel to the X axis with the maximum and minimum Y coordinates. Further, as shown in FIG. 12B, a rectangular frame circumscribing the region surrounded by the locus is set, but a rectangular frame may be set in the region surrounded by the locus.

  In this way, when the control unit 39 sets the rectangular frame, which position in the image is instructed from the relationship between the position of the locus designated by the laser light and the position in the image projected on the screen. And a rectangular frame is blinked and displayed at the corresponding position (step D5).

  Here, the position of the rectangular frame can be arbitrarily changed by performing the same operation as described above on the button 51 (first button) (steps D1 to D5).

  On the other hand, when the operation of pressing the second button of the button 51 is performed, the control unit 52 is notified from the input control unit 53 that there has been an operation on the second button, and accordingly, the projector device 10 is notified. Send confirmation instructions.

  When the projector device 10 receives the confirmation instruction from the laser pointer 50 through the communication unit 43 (step D6), the projector device 10 determines the target pointers 1 and 2 representing the position of the rectangular frame set based on the locus of the laser light. That is, the control unit 39 stores the coordinates (X1, Y1) in the memory using, for example, the upper left vertex of the rectangular frame as the target pointer 1, and determines the position of the target pointer 1 (step D7). Further, the control unit 39 stores the coordinates (X2, Y2) in the memory using, for example, the lower right vertex of the rectangular frame as the target pointer 2, and determines the position of the target pointer 2 (step D8).

  Thus, the positions of the target pointers 1 and 2 are determined from the rectangular frame set based on the locus designated by the laser beam from the laser pointer 50, and the coordinates (X1, Y1) (X2, Y2) of the respective positions are determined. When detected, in steps D9 to D12, processing similar to that in steps B15 to B18 in the second embodiment is executed to enlarge and project an image in a rectangular frame designated by two points.

  In this manner, in the fourth embodiment, the main body main key / indicator 15 provided in the projector apparatus 10 is not operated, and is configured independently of the apparatus main body at a position away from the projector apparatus 10. By simply operating the laser pointer 50, a locus as shown in FIG. 11 (a) or FIG. 12 (a) is designated by a laser beam for an image projected on the screen, and an image range to be enlarged is specified. A rectangular frame to be shown can be set, and the image can be enlarged and projected.

  In the description of the first to fourth embodiments described above, the range (area) to be enlarged in the image is specified by a rectangle, but may be specified by another shape. For example, by arbitrarily designating positions of three or more points, a region to be enlarged can be designated by a polygon having an arbitrary shape. Furthermore, in the fourth embodiment, a region having an arbitrary shape can be designated by designating a locus by laser light using the laser pointer 50.

  Thus, when an area to be enlarged is specified by an arbitrary shape, the length to be used as a reference for enlarging the image in the area is determined based on the shape of this area in the same manner as in the first to fourth embodiments. To do. For example, as described in the fourth embodiment, as shown in FIG. 12B, a rectangular frame circumscribing a region having an arbitrarily designated shape is set, and the length of any side of the rectangular frame is set. Can be used as a reference. Further, for example, a rectangular frame included in a region having an arbitrarily designated shape can be set, and the length of any side of the rectangular frame can be used as a reference. The rectangular frame included in the region is set so that, for example, at least one vertex of the rectangular frame is in contact with (matches) the end of the region.

  Each embodiment described above includes inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of problems to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

The figure which shows the external appearance structure of the projector apparatus 10 in the 1st thru | or 3rd embodiment of this invention. The figure which shows the detailed arrangement configuration of the main body main key / indicator 15 in 1st thru | or 3rd Embodiment. The block diagram shown about the function structure of the electronic circuit of the projector apparatus 10 in 1st thru | or 3rd Embodiment. 6 is a flowchart for explaining the operation of the projector device according to the first embodiment. The figure which shows the example in the case of enlarging (zooming) an image by designating the target pointers 1 and 2 with respect to the image projected on the screen in 1st Embodiment. The figure for demonstrating the difference of the expansion ratio of the vertical and horizontal of the rectangular frame defined by 2 points | pieces in 1st Embodiment. The figure for demonstrating the expansion of an image when making into a reference | standard the side where an expansion rate becomes large in 1st Embodiment. 10 is a flowchart for explaining an operation of the projector device according to the second embodiment. 10 is a flowchart for explaining an operation of a projector device according to a third embodiment. 10 is a flowchart for explaining an operation of a projector device according to a fourth embodiment. The figure which shows the example of a setting of the rectangular frame based on the locus | trajectory of the pointer in 4th Embodiment. The figure which shows the example of a setting of the rectangular frame based on the locus | trajectory of the pointer in 4th Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector apparatus, 11 ... Main body casing, 12 ... Projection lens, 13 ... Shooting lens, 14 ... Ir receiver, 15 ... Main body main key / indicator, 15a ... Power key, 15b ... Two-point zoom (Zoom) 15b1 ... Pointer 1 key, 15b2 ... Pointer 2 key, 15c ... Focus key, 15d ... "AFK" key, 15e ... "Input" key, 15f ... "Auto" key, 15p ... Power / standby indicator, 15 ... Temperature indicator, 16 ... Speaker, 17 ... Cover, 18 ... Input / output connector, 19 ... Ir receiver, 20 ... AC adapter connection, 21 ... Fixed leg, 22 ... Adjustment leg, 31 ... Input / output interface (I / F), 32 ... Image processing unit, 33 ... Display encoder, 34 ... Video RAM, 35 ... Table Drive unit 36 ... Spatial light modulation element (SOM), 37 ... Light source lamp, 38 ... Lens drive unit, 39 ... Control unit, 40 ... Image storage unit, 41 ... Audio processing unit, 42 ... Shooting unit, 43 ... Communication 45, a key / indicator unit, 50, a laser pointer, 51, a button, 52, a control unit, 53, an input control unit, 54, a laser beam output unit, 55, a communication unit.

Claims (14)

In a projection device that projects an image,
Area designating means for designating a specific area for the projected image;
A discriminating unit for discriminating a length as a reference for enlarging an image in the region designated by the region designation unit;
An image enlarging means for enlarging an image in the area based on the reference length determined by the determining means and the size of the entire image;
A projection apparatus comprising: an enlarged image projecting unit that projects an image magnified by the image enlarging unit.   The projection apparatus according to claim 1, wherein the area designating unit is designated by a plurality of positions. In a projection device that projects an image,
Position specifying means for specifying the position of two points with respect to the projected image;
Setting means for setting a rectangular frame having the two points designated by the position designation means as diagonal vertices;
A discriminating unit for discriminating a side as a reference for enlarging the image of the rectangular frame set by the setting unit;
An image enlarging means for enlarging the image in the rectangular frame based on the length of the side determined by the determining means and the size of the entire image;
A projection apparatus comprising: an enlarged image projecting unit that projects an image magnified by the image enlarging unit.   The projection apparatus according to claim 1, wherein the determination unit performs determination based on a side having a small enlargement ratio when the image is enlarged by the image enlargement unit. Reference setting means for setting which side is used as a reference when the image is enlarged by the image enlargement means,
The projection apparatus according to claim 1, wherein the determination unit determines as a reference for enlarging the side set by the reference setting unit. The position specifying means includes
First designation means for designating the position of the first point;
First confirmation means for confirming the position of the first point designated by the first designation means;
Second designating means for designating the position of the second point;
Second determining means for determining the position of the second point specified by the second specifying means;
4. The projection apparatus according to claim 3, wherein two points when both the first point and the second point are determined by the first determination unit and the second determination unit are designated positions. . The area specifying means includes:
Trajectory detection means for detecting a trajectory designated by a laser beam for the projected image;
The projection apparatus according to claim 1, further comprising a region discriminating unit that discriminates the specific region based on the trajectory detected by the trajectory detecting unit. An image pickup means for picking up the projected image;
The projection apparatus according to claim 7, wherein the trajectory detection unit detects a trajectory designated by the laser light from an image photographed by the imaging unit.   4. The projection apparatus according to claim 3, wherein the position designating unit designates positions of two points designated by laser light with respect to the projected image. An image pickup means for picking up the projected image;
The projection apparatus according to claim 9, wherein the position specifying unit detects positions of two points specified by the laser light from an image captured by the imaging unit. In a projection method for projecting an image,
An area designating step for designating a specific area for the projected image;
A discriminating step for discriminating a length as a reference for enlarging an image in the region designated by the region designating step;
An image enlarging step for enlarging the image in the region based on the reference length determined by the determining step and the size of the entire image;
And a magnified image projecting step of projecting the image magnified by the image magnification step. In a projection method for projecting an image,
A position specifying step for specifying the position of two points with respect to the projected image;
A setting step for setting a rectangular frame having the two points designated by the position designation step as diagonal vertices;
A discriminating step for discriminating a side as a reference for enlarging the image of the rectangular frame set in the setting step;
An image enlarging step for enlarging the image in the rectangular frame based on the length of the side determined by the determining step and the size of the entire image;
And a magnified image projecting step of projecting the image magnified by the image magnification step. A computer mounted on a projection device that projects an image,
Area designating means for designating a specific area for the projected image;
A discriminating unit for discriminating a length as a reference for enlarging an image in the region designated by the region designation unit;
An image enlarging means for enlarging an image in the area based on the reference length determined by the determining means and the size of the entire image;
A projection control program for functioning as an enlarged image projecting unit that projects an image enlarged by the image enlarging unit. A computer mounted on a projection device that projects an image,
Position specifying means for specifying the position of two points with respect to the projected image;
Setting means for setting a rectangular frame having the two points designated by the position designation means as diagonal vertices;
A discriminating unit for discriminating a side as a reference for enlarging the image of the rectangular frame set by the setting unit;
An image enlarging means for enlarging the image in the rectangular frame based on the length of the side determined by the determining means and the size of the entire image;
A projection control program for functioning as an enlarged image projecting unit that projects an image enlarged by the image enlarging unit.

Images