JPH0496584A - Digital picture synthesizer - Google Patents

Abstract

PURPOSE:To form 3-dimension picture synthesis provided with inter-perspective with simple constitution by selecting any of output pictures of plural digital special effect devices in the unit of picture elements and outputting the result switchingly in response to an external mode selection signal. CONSTITUTION:In the case of implementing 3-dimension picture synthesis provided with inter-perspective, a picture switching signal K3 is designated by using a mode selection signal M. A selection section 13 uses the picture switching signal K3 as a switching control signal C to send it to a picture switching section 11. The picture switching section 11 selects a picture signal S1 when the switching control signal C, that is, the picture switching signal K3 is at a high level and selects a picture signal S2 when the picture switching signal K3 is at a low level. Thus, a picture approaching the processed picture is so processed that the approaching picture comes upward in the unit of picture elements. Moreover, in this case, a data in the direction Z in an area other than a valid picture part corresponding to a key signal is controlled to be infinite. Thus, the 3-dimension picture synthesis provided with inter-perspective is generated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a digital image synthesis device, and in particular, the present invention relates to a digital image synthesis device, and in particular, to a two-dimensional image synthesis device, which produces an effect projected onto a three-dimensional space based on perspective information for each pixel of an input image. The present invention relates to a digital image synthesizing device that synthesizes output images of a plurality of digital special effects devices that output images obtained by adding -Ij.

[Conventional technology]

When a conventional digital image synthesis device synthesizes the output images of multiple digital special effects devices of this kind, the digital special effects device corresponds to the effect that is projected onto a human image into a three-dimensional space. In response to a key signal, the output image of one digital special effect device is inserted into the output image of the other digital special effect device to synthesize the image.

[Problem to be solved by the invention]

-F In the conventional digital image synthesis apparatus described above, the output image of one digital special effect apparatus is inserted into the output image of the other digital special effect apparatus in accordance with a key signal and synthesized. However, since the key signal itself is a two-dimensional plane signal, it is possible to simply overwrite or synthesize the output images of each digital special effects device by controlling the draft, but even though the image has been given a three-dimensional effect, First, it was difficult to obtain a composite image that gave a mutual perspective effect.

SUMMARY OF THE INVENTION An object of the present invention is to provide a digital image compositing device that can obtain a three-dimensional composite image with mutual perspective effects.

[Means to solve the problem]

The digital image synthesis device of the present invention uses a plurality of digital special effects to generate an image with a three-dimensional effect on an image portion specified by a key signal, based on perspective information of each pixel of an input image on a two-dimensional plane. A digital image synthesis device for synthesizing output images of the device, comprising means for generating an image switching signal by comparing perspective using the perspective information from the plurality of digital special effect devices, and switching the image in response to an instruction from an external device. means for selecting one of the key signals from the plurality of digital special effect devices and outputting it as a switching control signal; and output images of the plurality of digital special effect devices in response to the switching control signal. and means for selecting one of these on a pixel-by-pixel basis and switching between the two for output.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. The digital image synthesis device 1o outputs three-dimensional effected image signals SL, S2 outputted by the digital special effects devices 2], 22, and Z-direction data Zl, Z2 generated for each pixel. and a key signal Kl corresponding to the effect image portion.

K2 to input terminals 111, 121, 112, 1, respectively.
22, 113, and 123, the synthesized image signal SO is output to the output terminal 13]. The digital image synthesis device 10 includes an image switching unit 11 that switches and outputs one of the image signals Sl and S2 in pixel units according to a switching control signal C, and Z-direction data Zl and Z2.
The comparator 12 outputs 3 for the image switching signal "C" and selects one of the key signals KL, 2 for the key signal, and 3 for the image switching signal according to the mode selection signal M input to the terminal +41. and a selection section 13 that outputs a switching signal C.

Next, the operation will be explained.

First, when performing image synthesis using the ``Gunnaru''-written draft control, the key signal Kl is set to 2 by the mode selection signal M.
Specify one of the following. The selection unit 13 selects a key signal K.
1, the designated key signal of 2 is sent to the image switching section 11 as a switching control signal C. The image switching unit 11 selects and outputs one of the image signals S1 and S2 in pixel units according to the switching control signal C, thereby changing the image corresponding to the key signal selected by the mode selection signal M. A composite image signal SO can be generated in which the signal is embedded in other image signals.

When performing three-dimensional image synthesis with a perspective effect, the mode selection signal M specifies 3 as the image switching signal. By the way, the comparison unit 1 that generates 3 in the image switching signal
2 compares Z-direction data Zi and Z2 indicating perspective generated for each pixel by the digital special effect devices 21 and 22; <22, that is, when the position of the image of the image signal Sl is closer than the image of the image signal S2, the image switching signal is set to 3, and conversely, when Z1≧72
In other words, the image of image signal S2 is higher than that of image signal s1.
If the image is closer than the image, but is equal, the image switching signal is set to 3 at low level. Now, the selection section 13 sends 3 to such an image switching signal as a switching control signal C to the image switching section 11. The image switching unit 11 receives the switching control signal C1
That is, when the image switching signal 3 is at a high level, the image signal s1 is selected, and when it is at a low level, the image signal s2 is selected. Therefore, switching is performed pixel by pixel so that the closer image is placed on top. Further, in this case, the Z direction data in the @ area other than the effective image portion corresponding to the key signal is controlled to be infinite.

In this way, a three-dimensional composite image that gives a mutual perspective effect can be generated.

(1) [Effects of the Invention] As explained above, according to the present invention, image signals given three-dimensional effects from a plurality of digital special effect devices, Z-direction data indicating perspective generated for each pixel, and effect images It receives key signals corresponding to each part, compares distance and near using Z-direction data, generates an image switching signal, and selects one of the image switching signal and the key signal according to an external mode selection signal. , by selecting one of the output images of a plurality of digital special effects devices pixel by pixel according to this selected signal, switching it and outputting it, if a key signal is selected with a mode selection signal, it is simply a Image synthesis using overwrite/draft control, and when an image switching signal is selected by the mode selection signal, three-dimensional image synthesis with mutual perspective effects can be realized with a simple configuration.

10...- Digital image synthesis device, 11...-
...Image switching section, 12--...Comparison section, 13...
...Selection section, 21, . 22...-Digital special effects device, 5IS2...-Image signal, SO.
. . . Composite image signal, KIK2 . . . Key signal, K3- . . . Image switching signal, ZI.

Z2--... Two-way data, C...- Switching control signal, M... Mode selection signal.

Claims (1)

[Claims] Digital image synthesis that combines the output images of multiple digital special effects devices to generate an image with a three-dimensional effect on the image part specified by the key signal based on the perspective information of each pixel of the input image on a two-dimensional plane. In the apparatus, means for generating an image switching signal by comparing distance information using the perspective information from the plurality of digital special effect devices; means for selecting any one of the key signals and outputting it as a switching control signal; and selecting one of the output images of the plurality of digital special effect devices pixel by pixel according to the switching control signal. 1. A digital image synthesis device characterized by comprising means for switching and outputting.