WO2008041270A1

WO2008041270A1 - Image synthesizing device and image synthesizing method

Info

Publication number: WO2008041270A1
Application number: PCT/JP2006/319416
Authority: WO
Inventors: Kenichiro Kuroki
Original assignee: Fujitsu Microelectronics Limited
Priority date: 2006-09-29
Filing date: 2006-09-29
Publication date: 2008-04-10

Abstract

An image synthesizing device includes: an α' value calculation unit (1) for calculating a blending coefficient α' according to an OSD image; and a synthesized image generating unit (3) for synthesizing the inputted OSD image with a video image to generate a synthesized image by using a blending coefficient α stored in an α value setting register (2) and the blending coefficient α' calculated by the α'value calculation unit (1).

Description

Specification

Image composition apparatus and image composition method

Technical field

[0001] The present invention relates to an apparatus and a method for performing image composition by alpha blending.

Background art

[0002] In recent years, in devices having a display device typified by a television receiver, an OSD (On Screen Display) image such as a character (caption) image or an operation menu is superimposed on a video image. In many cases, devices such as a rich operation menu are displayed to facilitate selection operations and improve user convenience.

[0003] In such a device, alpha blending and! /, Techniques are used to overlay a translucent character image, OSD image, etc. on a video image. For example, when a semi-transparent OSD image is superimposed on a video image and synthesized, alpha blending is performed by calculating the following formula (1) using the blending coefficient α (where 0≤ α≤1). An image is generated.

[0004] Composite image = OSD image * α + video image * (1− α) Equation (1)

In this case, the OSD image is completely transparent when α = 0, and completely opaque when α = 1.

[0005] FIG. 9 is a block diagram showing a main configuration of a conventional image synthesizing apparatus that synthesizes an OSD image and a video image by alpha blending.

As shown in the figure, with conventional devices, when OSD images and video images are input,

The composite image generation unit 42 generates and outputs a composite image by performing the calculation of the above equation (1) using the predetermined α value stored in the α value setting register 41.

FIG. 10 is a diagram for explaining an example of an image of “OSD image * α” in the above equation (1), which is generated in the process of generating a composite image by the composite image generation unit 42.

As shown in the figure, the composite image generation unit 42 generates a composite image based on the input OSD image 43 and a predetermined α value stored in the α value setting register 41. , "0

An image of “SD image * a” (“OSD image generated by the normal method” in the figure) 44 is generated. [0007] In addition to this, an apparatus that performs image blending by alpha blending as described above, for example, in Patent Document 1, sets the blending coefficient α (0≤ α≤1) to a specific value according to the pixel component. Devices have been proposed that can reduce the required memory and the load associated with processing by setting. In this device, the α value is controlled and set by paying attention to the component of the pixel. A predetermined α value is set according to the specific pixel component.

On the other hand, Patent Document 2 proposes an apparatus that improves the visibility of drawing data such as characters and lines by setting the display color of the drawing data based on the background color. In this device, the color of the drawing data is adjusted and set (selected) according to the background color.

[0009] By the way, for a device having a large screen such as a normal television receiver, a character image or an OSD image superimposed on a video image has an appropriate size (area). If image synthesis is performed using a sharp α value, V and a composite image can be generated without impairing the visibility of a character image and a video image.

[0010] However, the mopile device represented by the mobile phone is forced to have a small display device (display screen) due to the nature of the device (device). Characters superimposed on the screen are inevitably small, and visibility is easily lost.

[0011] In other words, in the case of alpha blending, which is a commonly used technique, when text information such as subtitles and OSDs is superimposed on the background video, text and video information is displayed on a device with a small display screen. It is difficult to achieve both visibility. In addition, creating a ZOSD image that has been intentionally adjusted for the value of the blending coefficient a and storing it as data is a limitation of general mopile equipment, that is, valuable and limited memory resources. It is not appropriate as a means to be realized. This is especially true when there is a need to have multiple types and sizes of character formats that have a large impact on cultural spheres with many character types.

[0012] In view of the above circumstances, the present invention is capable of synthesizing a composite image that is capable of image synthesis by alpha rendering under precious and limited memory resources and that has both character and video information visibility. An object is to provide an image composition apparatus and an image composition method that can be generated.

Patent Document 1: Japanese Patent Laid-Open No. 2002-278538 Patent Document 2: Japanese Patent Laid-Open No. 2001-285745

Disclosure of the invention

[0013] An image composition apparatus according to a first aspect of the present invention includes an image composition apparatus including a composite image generation unit that generates a composite image by combining a plurality of images using the first rendering coefficient α. And, based on one or more images included in the plurality of images, comprises an O correction calculation means for calculating a second rendering coefficient O ′, and the composite image generation means includes The plurality of images are synthesized using a blending coefficient a of 1 and a second rendering coefficient calculated by the a direct calculation means to generate a composite image.

[0014] According to this apparatus, since an appropriate second blending coefficient (X 'is calculated and image synthesis is performed using this and the first blending coefficient α, it is valuable and limited. It is possible to combine images by alpha blending under the memory resources, as well as composite images that achieve both character and video information visibility (for example, composite images of video images and OSD images, etc.) Therefore, even when a composite image is displayed on a small display device (display screen) such as a mopile device, the visibility of text and video information is not impaired.

[0015] An image composition device according to a second aspect of the present invention is the image composition apparatus according to the first aspect, wherein the ex 'value calculation means is calculated based on one or more images included in the plurality of images. The feature is that the blending coefficient of 2 is variable according to the image area.

[0016] According to this apparatus, the second blending coefficient oc 'can be made variable according to the image area.

The image composition apparatus according to a third aspect of the present invention is the image composition apparatus according to the first aspect, wherein the value calculation means comprises edge extraction means for extracting edge information from one image included in the plurality of images. The second rendering coefficient oc ′ is calculated based on the edge information extracted by the edge extraction means.

[0017] According to this apparatus, the second rendering coefficient a 'can be calculated based on edge information obtained by extracting one image force included in a plurality of images to be synthesized. An image composition device according to a fourth aspect of the present invention, in the third aspect, The value calculating means further includes a direct arithmetic expression defining means for calculating a second blending coefficient a ′ based on the edge information extracted by the edge extracting means and a predefined a direct arithmetic expression. It is characterized by comprising.

[0018] According to this apparatus, the second rendering coefficient a 'can be calculated based on the extracted edge information and a predefined a' value arithmetic expression.

The image composition device according to a fifth aspect of the present invention is the image composition device according to the fourth aspect, wherein the value arithmetic expression is in accordance with a distance from the edge position specified by the edge information extracted by the edge extraction means. It is characterized in that the oc 'value is a defined arithmetic expression.

[0019] According to this apparatus, the straight a can be determined according to the distance from the edge position.

According to a sixth aspect of the present invention, in the first aspect, the value calculation means is based on color information or luminance information of one or more images included in the plurality of images. The second blending coefficient is calculated.

[0020] According to this apparatus, the second rendering coefficient a 'can be calculated based on color information and luminance information of one or more images included in a plurality of images to be synthesized.

An image composition device according to a seventh aspect of the present invention further comprises a switching means for switching processing of the composite image generation means in the first aspect, wherein the composite image generation means is responsive to switching by the switching means. And combining the plurality of images using only the first blending coefficient α to generate a composite image, or using the first blending coefficient a and the second blending coefficient a. The composite image is generated by combining the plurality of images.

[0021] According to this apparatus, the power to generate a composite image using only the first blending coefficient a or the first blending coefficient (using the first blending coefficient X and the second blending coefficient α ') It is possible to switch whether to generate an image.

[0022] The present invention is not limited to the apparatus according to each aspect described above, and may be configured as a method and a program.

Brief Description of Drawings

[0023] The present invention will be more clearly understood with reference to the following detailed description in conjunction with the accompanying drawings. It will be.

FIG. 1 is a block diagram showing a main configuration of an image composition device according to an embodiment of the present invention provided in a mopile device having a small display device.

FIG. 2 is a block diagram showing a specific configuration example of an image composition device when an oc ′ value is derived based on extracted edge information.

FIG. 3 is a diagram illustrating an example of an oc direct arithmetic expression defined in advance in an a direct arithmetic expression definition unit.

FIG. 4 is an example of an image of “OSD image * —” in Equation (2) generated by the composite image generation unit of the image composition device according to the embodiment of the present invention in the process of generating a composite image. FIG.

FIG. 5 is a diagram schematically showing a composite image generated by each of the image composition device according to the present embodiment shown in FIG. 2 and the conventional image composition device shown in FIG. 9.

FIG. 6A is a first diagram showing another example of the direct arithmetic expression.

FIG. 6B is a second diagram showing another example of the direct arithmetic expression.

FIG. 6C is a third diagram showing an example of another a direct arithmetic expression.

FIG. 6D is a fourth diagram showing another example of the a ′ value arithmetic expression.

FIG. 7 is a configuration diagram of an information processing apparatus.

FIG. 8 is a diagram showing a recording medium.

FIG. 9 is a block diagram showing a main configuration of a conventional image synthesizing apparatus that synthesizes an OSD image and a video image by alpha blending.

FIG. 10 is a diagram illustrating an example of an image of “OSD image * α” in Expression (1) generated in the process of generating a composite image by a composite image generation unit according to a conventional image composition device.

BEST MODE FOR CARRYING OUT THE INVENTION

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

FIG. 1 is a block diagram showing a main configuration of an image composition device according to an embodiment of the present invention provided in a mopile device having a small display device (display screen). For example, mobile devices are mobile phones, PHS (Personal Handyphone System), PDA ( Te with Personal Digital Assistants).

In the figure, a value calculation unit 1 is a circuit that calculates an appropriate blending coefficient according to an image to be synthesized on a video image. In the present embodiment, an image synthesized on a video image is described as an OSD image. As will be described later in detail, the value calculation unit 1 calculates oc directly based on a preset calculation expression while referring to the OSD image.

The a value setting register 2 stores a predetermined blending coefficient α.

When the video image and the OSD image are input, the composite image generation unit 3 uses the pre-blending coefficient calculated by the value calculation unit 1 and the predetermined blending coefficient a stored in the α value setting register 2 to By performing the calculation of equation (2), image synthesis is performed by alpha blending, and a synthesized image is generated and output.

[0027] Composite image = OSD image * — οΤ) + video image — οΠ) Equation (2)

However, the a value and a straight are the values that satisfy 0≤ α≤ 1 and 0≤ (α—α Ί≤ 1. Also, the OSD image is completely transparent when ex—ex ′ = 0. Completely opaque when oc— = 1.

It should be noted that the composite image generation unit 3 performs the calculation of “—” in the calculation of the above equation (2) by the internal α value calculation unit.

As described above, the image compositing apparatus according to the present embodiment has a new ex direct arithmetic unit 1 that calculates an appropriate blending coefficient oc ′ according to the OSD image, compared to the conventional apparatus shown in FIG. In addition, the composite image generation unit 3 corresponding to the composite image generation unit 42 shown in FIG. 9 is configured to be expanded so that a composite image can be generated in accordance with the straight a and the a value.

Note that the α value setting register 2 has the same configuration as that of the α value setting register 41 shown in FIG. 9, and in this embodiment, the α value stored therein is also shown in FIG. It is the same as a conventional device.

[0030] The composite image generated by the image composition apparatus configured as described above is displayed on, for example, a display device of a mopile device provided with the image composition apparatus.

Next, in the image composition device according to the present embodiment, the value calculation unit 1 refers to the OSD image and extracts edge information (for example, edge information such as characters included in the OSD image). Explains an example in which a straight is derived based on the extracted edge information

FIG. 2 is a block diagram showing a specific configuration example of the image synthesis apparatus in such a case. As shown in FIG. 2, in this case, the value calculation unit 1 refers to the OSD image. In order to extract edge information and derive an a ′ value based on the extracted edge information, an edge extraction unit la and an a “value arithmetic expression definition unit lb are provided.

[0032] The edge extraction unit la also extracts edge information from the OSD image force. The extraction of edge information from the OSD image can be performed by, for example, filter processing or pattern matching with a pre-registered pattern. When extracting edge information by pattern matching, a pattern registration register for storing the pattern can be further provided.

[0033] The a direct arithmetic expression defining unit lb generates (X direct based on the extracted edge information and a pre-defined ex 'value arithmetic expression described later. However, based on the a direct arithmetic expression, The generated (X 'value is a value satisfying 0≤ (α-α') ≤ 1 as described above.

In FIG. 3, OSD image input Buffer 4 is a notifier in which OSD images input to composite image generation unit 3 and α 1 value calculation unit 1 are temporarily stored. The video image Buffer 5 is a notch in which the video image input to the composite image generation unit 3 is temporarily stored. The α value setting register 2 and the composite image generation unit 3 are as described above.

FIG. 3 is a diagram illustrating an example of the oc direct arithmetic expression defined in advance in the oc ′ value arithmetic expression defining unit lb. In this figure, the horizontal axis represents the distance (edge distance) of the edge position force, and the vertical axis represents the α ′ value.

[0036] In the case of the figure, the a direct arithmetic expression defining unit lb is an OSD image in which the edge information power extracted by the edge extracting unit la is specified according to the a direct arithmetic expression represented by a thick line in the figure. In a region surrounded by edges (for example, a character region surrounded by the edges of characters included in an OSD image), an edge position force distance D

1

Generate 0 as the last line, and generate '! As the last line! / FIG. 4 is a view for explaining an example of an image of “OSD image * —α ′)” in the above equation (2), which is generated in the process of generating the composite image by the composite image generation unit 3.

As shown in the figure, the composite image generation unit 3 includes the a ′ value generated based on the OSD image 6 by the processing of the edge extraction unit la and the value arithmetic expression definition unit lb, and the input OSD image 6 Based on the predetermined α value stored in the α value setting register 2, an “OSD image * — al] image (“ OSD image generated by this method ”in FIG. 7) 7 is generated.

[0038] As described with reference to FIG. 3, in the image 7 of “OSD image * — α Ί” shown in FIG. 4, an area having a constant width from the edge position to a position D away (image 7). In the dark

1

(OSD image * —0) ”for the colored part), which is equivalent to“ OSD image * HI ”in equation (1) above, and other areas (lightly colored part in image 7) Will be affected by the "OSD image * —;)". sand

1

In other words, in the image 7 of “OSD image * (α−αΊ”, the region other than the region having a certain width from the edge position is a more transparent image.

[0039] In the composite image generation unit 3, an image of "OSD image * — α Ί" is generated in this manner, and “video image * (1— (α—))” in the above equation (2). These images are also generated, and a composite image of both images is generated. Here, in the image of “OSD image * — '” ”(for example, image 7 in FIG. 4), the“ OSD image * generated by the composite image generation unit 42 of the conventional image composition apparatus shown in FIG. It becomes a more transparent image than the image of “hi” (eg, image 44 in FIG. 10). In addition, in the image of “video image * (1— (α—αΊ)”, the image of “video image * (1—hi)” generated by the composite image generation unit 42 of the conventional image synthesizer is used. Therefore, the composite image generated by the composite image generation unit 3 is different from the composite image generated by the image generation unit 42 of the conventional apparatus shown in FIG. As a result, the video image becomes darker (more transparent) and darker (more opaque), so that the composite image generated by the composite image generation unit 3 is displayed on a small display device included in the mopile device. Sometimes the OSD and video visibility can be improved.

FIG. 5 shows the image synthesizing apparatus according to the present embodiment shown in FIG. 2 and the conventional image shown in FIG. It is a figure which shows typically the synthesized image produced | generated by each of the synthetic | combination apparatuses. In FIG. 5, the input OSD image and video image are OSD image 8 and video image 9, and the background area of both images is colorless and transparent (transparent color). In this case, in the conventional image composition device, the “OSD image 8 * α” image is superimposed on the “video image 9 * (1-H)” image, and the composite image 10 is generated. On the other hand, in the image composition device according to the present embodiment, the image “OSD image 8 —” is superimposed on the image “image image 9 (α οΤ)” to generate a composite image 11. .

[0041] As shown in the figure, in the composite image 11, an area with a constant width from the edge position of the figure included in the OSD image 8 to a position that is a distance D away from the figure is described as "OSD image

1

8 * -0) ”, which is equivalent to the image in the conventional device (the image of“ OSD image 8 * α ”). In addition, in the composite image 11, the OSD image 8 * (H

1;) ”, which is more transparent (thin! /,) Than the image on the conventional device (“ OSD image 8 * a ”image).

[0042] Although not shown in the figure, the area of the figure included in the video image 9 is a composite image.

11 is an image of “video image 9 (α—oT))”, and the composite image 10 is an image of “video image 9 * (1—hi)”. Composite image 11 is better

, Resulting in a darker (more opaque) image.

[0043] Therefore, when the composite image 11 is displayed on a small display device included in the mopile device, the visibility of the OSD and the video can be improved as compared with the case where the composite image 10 is displayed.

As described above, according to the image synthesizing apparatus according to the present embodiment, the visibility of characters (OSD) and video information can be set by setting an appropriate a “value arithmetic expression as shown in FIG. As a result, it is possible to easily generate a composite image that improves the visibility of text and video information when the generated composite image is displayed on a small display device (display screen) of a mono device. It can be improved further.

[0045] In addition, it is also necessary to create a character image ZOSD image that has been intentionally adjusted to the value of the blending coefficient ex as in the conventional device and store it as data. In addition, there are no restrictions such as limited memory resources. In addition, the image composition device according to the present embodiment adds a 'value calculation unit 1 to the conventional device (see FIG. 9), and the composite image generation unit 3 uses values and values. Since it can be realized by expanding and configuring so that a composite image can be generated according to the value, coexistence with existing devices is facilitated.

[0047] In addition, by devising the a direct arithmetic expression as shown in Fig. 3, it is possible to increase the effect by increasing the effect of a direct, or to reduce the effect by reducing the effect of O direct and to suppress the effect. In other words, it is easy to select the circuit scale.

[0048] In addition, since the degree of influence a by the a direct can be changed simply by changing the a direct arithmetic expression as shown in Fig. 3, the display device (display screen) for displaying the generated composite image can be changed. Easily confirm the optimal OC 'value calculation formula according to the Z test.

Note that in the image composition device according to the present embodiment, the a direct arithmetic expression defined in advance in the ex direct arithmetic expression defining unit lb (see FIG. 2) is the a direct arithmetic expression indicated by the bold line in FIG. Force as an arithmetic expression Not limited to this, it is also possible to use other value arithmetic expressions as shown in FIGS. 6A, 6B, 6C, and 6D, for example. In FIGS. 6A, 6B, 6C, and 6D, the horizontal axis represents the distance from the edge position (edge distance), and the vertical axis represents the value.

[0050] According to the α direct arithmetic expression represented by the bold line shown in FIG. 6A, the image of the “OSD image * (α—)” generated by the composite image generation unit 3 is used in advance from the edge position. For areas up to a distance away, the image gradually increases in transparency with a constant slope, and for the other areas, the image has a certain transparency.

[0051] According to the a direct arithmetic expression represented by the thick line shown in Fig. 6B, the image of the "OSD image * (α-)" generated by the composite image generation unit 3 is used to obtain a predetermined value from the edge position. For areas up to a distance away, the transparency gradually increases with the slope of the curve, and for the other areas, the image has a certain transparency.

[0052] According to the a direct arithmetic expression represented by the thick line shown in FIG. 6C, in the image of “OSD image * — α Ί” generated by the composite image generation unit 3, the inclination is constant as the edge position force is separated. The image gradually increases in transparency.

[0053] According to the a direct arithmetic expression represented by the thick line shown in FIG. 6D, in the “OSD image * (α—0 ^)” image generated by the composite image generation unit 3, the distance from the edge position increases. gradually This results in an image with reduced transparency.

[0054] In the image composition device according to the present embodiment, the value calculation unit 1 calculates a value with reference to an OSD image. For example, the value calculation unit 1 is configured to calculate a value with reference to a video image. It is also possible to do. Alternatively, the value can be calculated by referring to both the OSD image and the video image. When configured to calculate the O correction with reference to the video image, for example, it may be configured to calculate the OC ′ value based on the color information or luminance information of the video image. .

[0055] In addition, the image synthesizing apparatus according to the present embodiment has the power to generate a synthesized image by synthesizing two images of an OSD image and a video image. It is also possible to compose the images in the same manner to generate a composite image.

[0056] Further, in the image composition device according to the present embodiment, the OSD image or the video image may be a moving image or a still image.

Further, in the image composition device according to the present embodiment, the force that generates the composite image according to the above equation (2) is not limited to this, and “(<< — οΤ)” in the above equation (2) It is also possible to configure to generate a composite image according to other formulas, such as a formula changed to “(α + αΊ)”

Further, in the image composition device according to the present embodiment, it is configured to further include a background color setting unit that sets a background color for the OSD image, and the edge extraction unit la of the a ′ value calculation unit 1 has the background The edge information can be extracted by extracting the change point of the background color set by the color setting unit. In this case, it is possible to further comprise a background color setting register for storing information on the background color set by the background color setting unit. In this case, the composite image generation unit 3 can also be configured so that the background color set by the background color setting unit is processed as a transparent color and does not appear in an actually displayed image.

In addition, the image composition device according to the present embodiment is further configured to further include a switching unit that switches the process of the composite image generation unit 3, and according to the switching by the switching unit. The composite image generation unit 3 generates a composite image using only the blending coefficient α, or generates a composite image using the blending coefficient α and the blending coefficient α. It is also possible to configure such that.

By the way, a mopile device including the image composition device according to the present embodiment is, for example, illustrated in FIG.

It is configured using an information processing device (computer) as shown in FIG.

The information processing apparatus shown in FIG. 1 includes a CPU (central processing unit) 21, a memory 22, and an input device 23.

, An output device 24, an external storage device 25, a medium drive device 26, and a network connection device 27, which are connected to each other by a nose 28.

The memory 22 includes, for example, a ROM (read only memory), a RAM (Random Access Memory), and the like, and stores programs and data used for processing. CPU21 is memory

The necessary processing is performed by executing the program using 22.

[0060] The oc direct calculation unit 1 and the composite image generation unit 3 shown in FIG. 1 and the edge extraction unit la and the oc direct calculation expression definition unit lb shown in FIG. Corresponds to the function.

[0061] The input device 23 is, for example, a keyboard, a pointing device, a touch panel, or the like, and is used for inputting a user power or inputting information. The output device 24 is, for example, a display, a speaker, and the like, and is used for outputting an inquiry to a user, a processing result, and the like.

[0062] The external storage device 25 is, for example, a magnetic disk device, an optical disk device, a magneto-optical disk device, a tape device, or the like. The information processing apparatus stores the program and data in the external storage device 25, and loads them into the memory 22 for use as necessary.

[0063] The medium driving device 26 drives a portable recording medium 29 and accesses the recorded contents. The portable recording medium 29 is an arbitrary computer-readable recording medium such as a memory card, a flexible disk, a CD-ROM (compact disk read only memory), an optical disk, and a magneto-optical disk. The user stores the program and data in the portable recording medium 29, and loads them into the memory 22 for use as necessary.

Each of the α setting register 2 shown in FIG. 1 (or FIG. 2) and the OSD image input buffer 4 and the video image input buffer 5 shown in FIG.

The network connection device 27 is connected to an arbitrary communication network such as a LAN (local area network) or the Internet, and performs data conversion accompanying communication. Information processing equipment is required In response to this, the above program and data are also received by the external device through the network connection device 27 and loaded into the memory 22 for use.

FIG. 8 shows a computer-readable recording medium that can supply a program and data to the information processing apparatus shown in FIG. The external storage device 25 is a portable recording medium 29 and the program and data stored in the database 32 of the server 31 are loaded into the memory 22 of the information processing device 33. The server 31 generates a carrier signal that carries the program and data, and transmits the carrier signal to the information processing device 33 via any transmission medium on the network. The CPU 21 executes the program using the data and performs necessary processing.

[0066] Although the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various improvements and modifications may be made without departing from the scope of the present invention. Of course!

As described above, according to the present invention, an image can be synthesized by alpha blending even under valuable and limited memory resources, and the combined image having both the visibility of text and video information can be achieved. Can be generated. Therefore, even when a composite image is displayed on a small display device (display screen) such as a mopile device, the visibility of characters and video information is not impaired.

Claims

The scope of the claims

[1] An image synthesizing apparatus provided with composite image generating means for generating a composite image by combining a plurality of images using the first rendering coefficient ex,

A second blending coefficient a ′ is calculated based on one or more images included in the plurality of images (comprising an X correction operation means,

The composite image generation means generates the composite image by combining the plurality of images using the first blending coefficient a and the second blending coefficient calculated by the a direct calculation means;

An image composition device characterized by the above.

[2] The second rendering coefficient calculated by the oc direct calculation means based on one or more images included in the plurality of images is variable according to an image region. Item 1. The image composition device according to Item 1.

[3] The value calculation means includes:

Edge extraction means for extracting one image force edge information included in the plurality of images,

Calculating a second blending coefficient based on the edge information extracted by the edge extraction means;

The image synthesizing device according to claim 1.

[4] The edge extraction means extracts one image force edge information included in the plurality of images by filter processing or pattern matching with a pattern registered in advance!

The image synthesizing device according to claim 3.

[5] The apparatus further comprises pattern storage means for storing the pattern,

5. The image synthesizing apparatus according to claim 4, wherein

[6] It further comprises background color setting means for setting a background color in an image from which edge information is extracted by the edge extraction means,

The edge extraction unit extracts edge information from one image included in the plurality of images by extracting a change point of the background color set by the background color setting unit. The

The image synthesizing device according to claim 3.

[7] A background color storage unit that stores information on the background color set by the background color setting unit,

The image synthesizing apparatus according to claim 6.

[8] The composite image generation means processes the background color set by the background color setting means as a transparent color.

The image synthesizing apparatus according to claim 6.

[9] The value calculation means includes:

OC further comprising a straightforward equation defining means for calculating a second blending coefficient oc ′ based on the edge information extracted by the edge extracting means and a predefined straight straight equation.

The image synthesizing device according to claim 3.

[10] The oc direct arithmetic expression is an arithmetic expression in which an oc ′ value corresponding to the distance of the edge position force specified by the edge information extracted by the edge extraction unit is determined.

The image synthesizing device according to claim 9.

[11] The image from which the edge information is extracted by the edge extraction means is an image that is combined in the foreground by the combined image generation means.

The image synthesizing device according to claim 3.

[12] The α direct calculation means calculates a second rendering coefficient oc based on color information or luminance information of one or more images included in the plurality of images.

The image synthesizing device according to claim 1.

[13] The one or more images having the color information and / or the luminance information are images other than the image synthesized in the foreground by the synthesized image generation means included in the plurality of images. The image composition device according to claim 12.

[14] The apparatus further comprises switching means for switching processing of the composite image generation means,

The composite image generation means generates a composite image by combining the plurality of images using only the first blending coefficient α in response to switching by the switching means. Alternatively, the plurality of images are synthesized using the first blending coefficient a and the second blending coefficient a to generate a composite image.

The image synthesizing device according to claim 1.

[15] For an image composition method of an image composition device that composes a plurality of images using the first blending coefficient a to generate a composite image,

Calculating a second blending coefficient based on one or more images included in the plurality of images;

Combining the plurality of images using the first blending coefficient a and the second blending coefficient to generate a composite image;

An image composition method characterized by the above.

[16] The second rendering coefficient 'calculated based on one or more images included in the plurality of images is variable according to the image region.

The image composition method according to claim 15, wherein:

[17] Extract edge information from one image cover included in the plurality of images, and calculate a second rendering coefficient a ′ based on the edge information.

The image composition method according to claim 15, wherein:

[18] Based on the extracted edge information and a pre-defined a ′ value calculation formula, a second rendering coefficient is calculated.

The image composition method according to claim 17.

[19] The oc direct arithmetic expression is an arithmetic expression in which the X direct is determined according to the distance from the edge position specified by the extracted edge information.

The image composition method according to claim 18, wherein:

[20] The computer of the image synthesizer that synthesizes a plurality of images using the first blending coefficient a to generate a synthesized image,

A second blending coefficient a ′ is calculated based on one or more images included in the plurality of images (X direct calculation function and

A composite image is generated by combining the plurality of images using the first blending coefficient ex and the second blending coefficient _α calculated by the ex-rectangular calculation function. Adult image generation function,

A program to realize

The computer of the image synthesizer that synthesizes a plurality of images using the first blending coefficient a and generates a synthesized image

The first blending coefficient (X and the (X composite image generation function for generating a composite image by combining the plurality of images using the second blending coefficient _a calculated by the direct calculation function, and

The computer-readable recording medium which recorded the program for implement | achieving.