JPH077269U - Image synthesizer - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a beautiful composite image that is not affected by the shadow of the subject due to the illumination light source, with the background of the subject as the background of another landscape. [Structure] An electronic camera for photographing a subject illuminated by an illumination light source, an image display device for displaying an image photographed by the electronic camera on a monitor, and a background image which is newly input or stored in advance. An information processing device for outputting to the video display device, and a light source box that scatters and emits light of a specific single color is arranged on the back surface of the subject.
By reducing restrictions on the color of the subject, a synthetic image in which an arbitrary background is fitted to the subject is created.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an image synthesizing apparatus that creates a composite image of a background image and a subject prepared in advance by removing the background of the photographed subject by the chroma key technique.

[0002]

[Prior art]

 Conventionally, video matte, chroma key technology, etc. have been known as background removal technology for subjects. In the case of using this chroma key technology, a chroma key back is formed on the back surface of the subject by using a colored cloth such as a screen of a specific single color. Place the subject in front of this screen, shoot it with an electronic camera such as a video camera, and separate only the same color part as the screen of this background from the image in which the subject is embedded in the background of this specific color Key signal is generated, the part of the same color as the screen is deleted according to this key signal, and this part is replaced with a background image such as a landscape image prepared in advance to replace the subject and the background prepared in advance. ) And a composite image can be obtained. In such background removal using chroma key, the skin color of the subject is mainly extracted (background removal), so cyan blue, which is the opposite color to this skin color, is often used as a chroma key back. , If the color of the subject's clothing is similar to that of this screen, it is difficult to distinguish it from the background, and some of the subject's clothing may be removed by the background color removal work using the chroma key. there were. In addition, when shooting in a narrow space (for example, a shooting box for a license, etc.), a shadow may appear on the screen around the subject due to the irradiation from the front of the illumination light source. Sometimes the background was not removed because it was distinguished as a different color. Therefore, color turbidity occurs around the subject in the composite image.

[0003]

[Problems to be solved by the device]

 When a reflective screen such as cloth is used for the chroma key back, it is necessary to select a color that does not match the color used by all clothes and ornaments and adopt it as a screen. I had to prepare and change the screen every time I photographed the subject, which was troublesome and difficult. In particular, when an unspecified number of subjects are targeted, some of the subjects are to be removed by the subject. Also, when using a reflective screen, if the shadow of the subject appears on the screen, the background of the shadow is not removed.Therefore, it is necessary to adjust the illumination of the subject so that the shadow does not appear. There was a problem that it did not always match the shooting conditions of. The purpose of this invention is to generate a key signal that is not affected by the shadow of the subject due to the illumination light source and that reliably removes only the background other than the subject, regardless of the color of the subject's clothes, and eliminates unnecessary image loss on the subject. It is intended to provide an image synthesizing device capable of obtaining a free image. An object of this invention is to provide an image synthesizing device capable of obtaining a clear color image as a synthetic photograph in which a person image is embedded in a landscape image.

[0004]

[Means for Solving the Problems]

 The object of the present invention is to scatter and irradiate the back surface of a subject with monochromatic light in an image synthesizing device that removes the background of the subject by chroma key technology when shooting the image of the subject with the electronic camera of the photographing device. This can be achieved by arranging a light source box, reducing restrictions on the color of the subject, and not being influenced by the shadow of the subject caused by the illumination light source to the subject. For example, the above-mentioned chroma key background used for chroma key background removal uses a light source box composed of a filter and a light source that transmits only a specific single color, and the background color that is the specific single color obtained by this light source box. On the other hand, the brightness is adjusted to the maximum value that the shooting means can take, and only the part of the same color as the background color obtained by this light source box from the image shot with the subject in front of this light source box is adjusted. It is possible to obtain a composite image by separately generating a key signal and replacing the background image or character image for which the background portion is intended in advance with the background image of the subject according to the key signal.

[0005]

[Action]

 The color of a subject placed in front of an optical device such as an electronic camera is obtained by reflection of the illumination light given to the subject, so when a light source box formed in a specific single color is placed behind the subject, Unless a color that totally reflects only the same color as the background color of the light source box is attached, it does not match the background color, and only non-selective illumination light is received. Those that totally reflect are very rare. Therefore, by using a light source box in the image synthesizing device of the present invention, by selecting a key signal for removing only the same color as this illumination color (emission color), reliable background removal and other It is possible to combine the image with the background image prepared in advance. Also, since the chroma key back by the light source box does not reflect the illumination light but creates the background color by emitting the surface itself, even if a shadow of the subject is generated by the illumination light from the front, the shadow is faded and the shooting is affected. In most cases, the illumination of the subject can be independently adjusted to the optimum state by considering only the shooting conditions of the subject. Therefore, the degree of freedom in photographing with the illumination light source increases.

[0006]

【Example】

 FIG. 1 is a schematic explanatory view of an embodiment of an image synthesizing apparatus according to the present invention. FIG. 2 is a sectional view of a light source box of one embodiment used in the image synthesizing apparatus. Reference numeral 1 denotes a light source box formed on a wall surface on which an object 2 is photographed, at least one fluorescent lamp 13 is arranged, and a light-transmitting diffusion plate 12 is arranged on the illumination side thereof. The diffuser plate 12 is, for example, a transparent plate made of milky white acrylic resin, frosted glass, or the like. A colored plate 11 colored in a specific single color, for example, a blue acrylic resin plate is arranged on the outer side of this. In this case, when a diffuser light source other than the fluorescent lamp 13 is used as the light source, the diffuser plate is not necessary. On the side of the photographing device 14, a plurality of video lights 3 for illuminating the subject 2, an electronic camera 6, a video printer 4 for printing and recording an image photographed by the electronic camera 6, a landscape image input in advance, A CPU 5 which is an information processing device which stores and stores a background image such as a character image, a CRT monitor 7 which processes an image of the subject 2 photographed by the electronic camera 6 and an image stored in the CPU 5 to display a video image. The operation panel 8 in which a selection SW and the like for selecting and extracting a specific one of the background images built in the CPU 5 and the speaker 10 for giving a voice instruction to the subject 2 are arranged. There is. As the photographing device 14, the one described in Japanese Patent Application No. 4-56533 filed by the applicant earlier can be used.

An image synthesizing device of the present invention will be described with reference to the drawings. The subject 2 sits in front of the electronic camera 6 of the photographing device 14, and the light source box 1 is arranged on the back of the subject 2. The video light 3 illuminates the subject 2, the power of the light source box 1 arranged on the back of the subject 2 is turned on, the illumination light source such as the fluorescent lamp 13 is turned on, the colored plate 11 emits surface light, and this colored light is emitted by the electronic device. The maximum brightness level that can be captured by the camera 6 is reached, and the aperture can be adjusted so that the exposure amount is controlled. The image of the subject 2 is input to the video printer 4 through the electronic camera 6 and displayed on the CRT monitor 7. Next, the selection switch of the operation panel 8 arranged in the photographing device 14 is selected and operated to display the background image stored in the CPU 5 incorporated in the photographing device on the CRT monitor 7. At this time, the CPU 5 simultaneously displays the video signal from the electronic camera 6 which has been previously captured on the CRT monitor 7 so that the subject 2 can visually recognize the composite image of the subject 2 and the background image. . The subject 2 can check his / her own image on the CRT monitor 7, and the subject 2 can take a predetermined pose according to a voice instruction from the speaker 10 or the like built in the photographing device 14. Next, the image on the CRT monitor 7 is fixed to the frame memory in the video printer 4, the data in this frame memory is output to the CPU 5, and the key signal is generated based on the preset background color. With this key signal, a composite image with the background image selected by the subject 2 can be obtained. The background color of the light source box 1 of the image synthesizing device of the present invention is colored in a preset color, and the synthesized image produced is sent to the video printer 4 and printed and recorded to obtain a synthetic photograph 9. In this invention, since the background removal work is performed by the chroma key technique using the color of the colored plate 11 as a key signal, reliable background removal can be performed because it is not based on the skin color of the subject.

[0008]

[Effect of device]

 The image synthesizing device of this invention can remove the background without being substantially affected by the color of clothes or ornaments of the subject. Therefore, it is possible to perform reliable background removal and composition without being limited to what the subject wears or wears. In addition, it is possible to prevent color turbidity due to the shadow of the subject, and to freely illuminate the subject.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of an embodiment of an image synthesizing device of the present invention.

FIG. 2 is a sectional view of a light source box of an embodiment of the image synthesizing device of the present invention.

[Explanation of symbols]

 1 ... Light source box 2 ... Subject 3 ... Video light 4 ... Video printer 5 ... CPU 6 ... Electronic camera 7 ... CRT monitor 8 ... Operation panel 9 ... Composite photo 10 ... Speaker 11 ... Coloring plate 12 ... Diffusion plate 13 ... Fluorescent lamp 14 … Shooting device

Claims (2)

[Scope of utility model registration request] 1. An image synthesizing device which removes a background of a subject by chroma key technology and replaces it with another background image when photographing an image of the subject by an electronic camera of the photographing device, photographing the subject illuminated by an illumination light source. An electronic camera, a video display device for displaying a video image captured by the electronic camera on a monitor, and an information processing device for newly inputting or storing a background image input in advance and outputting the background image to the video display device. The image synthesizing device is characterized in that a light source box that scatters and irradiates light of a specific single color is arranged on the back surface of the subject to reduce restrictions on the color of the subject. 2. The image synthesizing apparatus according to claim 1, wherein the light source box is formed of a light source, a light-transmitting colored plate, and a light diffusing plate.