JP2002044521A - Simple image composition device and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple image composition device that employs one portable video camera. SOLUTION: The simple image composition device that synthesizes supplied input images and transmits a composited image, has integrally configured components consisting of recording and reproducing means 2, 4 that have a 1st recording medium 3M recording a signal from an image pickup device 1 as a 1st image, a weighting and composition processing means 6 that provides a weight to the 1st image having already been recorded from the recording and reproducing means and a 2nd image form the image pickup device 1 at a preset in-screen position and composites the weighted images, an image compression means 8 that applies image compression to an output of the weighing and composition processing means 6 and an image transmission means 9 that transmits an output of the image compression means 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable video camera for photographing a site, and then simply synthesizing a situation explanation of an explainer there and transmitting the same at a low coding rate to a remote site. The present invention relates to a simple image synthesizing apparatus that allows an observer in the facility to easily grasp the situation.

[0002]

2. Description of the Related Art In recent years, portable video camera systems have been remarkably popularized, and have been used quite frequently for general home use and business use. For example, to shoot a building construction site etc., use a portable video camera system to record it on tape, then play it back in another place later, and let other people correctly understand the situation of the site Has been taken.

[0003] In order to assist in understanding, when a staff member explaining the condition of the site is to be included, a video camera is fixed using a tripod, and the staff member also takes a picture with the site. I have. In this photographing method, it is general that at least two persons separately perform an on-site presenter and a photographer.

[0004] In addition, in a method of synthesizing images of both the site and the explainer using an expensive photographing apparatus and image synthesizing apparatus in earnest, editing work of the images is separately required, it takes time, and somehow. It was complicated and cumbersome.

[0005]

In the case of shooting the site with a portable video camera, transmitting the compressed image, and trying to put an instructor in the video, the camera is fixed using a tripod and the instructor is also required. I had to shoot with the scene, which was annoying. Alternatively, it is necessary to combine the images of both the site and the explainer using an expensive combining device. Therefore, the emergence of a simple image synthesizing apparatus capable of easily synthesizing and transmitting images by an integrated configuration and procedure has been desired.

[0006]

In order to solve the above-mentioned problems, the present invention provides a video camera in which, in the above-mentioned field shooting, a field is preliminarily photographed and recorded and reproduced, and at the same time, a video camera is positioned at a predetermined position. The video of the staff member is synthesized and the image is compressed. At this time, the two images, the reproduced image of the site and the image of the explainer captured from the camera, are weighted at a predetermined position in the screen and combined. By setting the position and shape to be combined in advance in this way, obtaining a combined image and compressing and transmitting it can be easily realized by an integrated configuration and procedure. That is, in order to solve the above-mentioned problem, the invention according to claim 1 is a simple image synthesizing apparatus for synthesizing and transmitting supplied input images, wherein a signal from one imaging apparatus 1 is converted into a first image. Recording / reproducing means 2 having a first recording medium 3M for recording as
4 and a weight that combines the first image already recorded by the recording / reproducing means 2 and 4 and the second image from the image pickup apparatus 1 at a predetermined position in the screen and combines them. A synthesizing unit, an image compressing unit for compressing an output of the weighting synthesizing unit, and an image transmitting unit for transmitting an output of the image compressing unit; A simple image synthesizing apparatus according to claim 2, wherein the first recording medium 3M for recording a signal of the imaging apparatus in the simple image synthesizing apparatus according to claim 1 is provided.
And means 4 for reproducing an image from the first recording medium, and digitally converting the reproduced image into a first image, and simultaneously reproducing the first image from the first recording medium, A simple image synthesizing apparatus characterized in that a signal of the imaging apparatus 1 is digitally converted into a second image, and the two digital images are superimposed on a predetermined position in a screen and synthesized. The invention of claim 3 is claim 1
In the simple image synthesizing device described in the above, the portable image camera has the portable video camera as the imaging device 1 and the first and second recording media 3M and 10M capable of recording and reproducing, and can reproduce the period designated in advance. A simple image synthesizing apparatus is provided, in which the weight is synthesized and compressed at a predetermined position in the screen for each reproduced image during the period, and the invention according to claim 4 is provided. Means for displaying a second image captured from the imaging device 1, means for displaying a preset synthesis position boundary simultaneously with the input image of the imaging device 1 on the display screen Providing a simple image synthesizing device characterized by having
According to a fifth aspect of the present invention, in the simple image synthesizing apparatus according to the first aspect, the first image recorded on the first recording medium 3 is subjected to frame skipping and image size reduction for a designated period. Digitally recorded on the second recording medium 10M,
Next, the image from the image pickup apparatus 1 or the second image recorded on the first recording medium 3M is digitally recorded on the second recording medium 10M by thinning out the frames and reducing the image size. The image is subjected to weighting set to the first image, the second image is subjected to weighting set to the second image, the weighted first image and the second image A simple image synthesizing apparatus characterized in that the first image is recorded on the first recording medium in the simple image synthesizing apparatus according to claim 1. A simple image synthesizing apparatus comprising means for selecting a place to be compressed from a temporally discontinuous place when selecting a place to be compressed from a recorded image of the present invention. A simple image synthesis method that synthesizes and transmits images And recording and reproducing steps 2 and 4 having a first recording medium 3 for recording a signal from one imaging device 1 as a first image, and the already recorded signals from the recording and reproducing steps 2 and 4. A weighting / synthesis processing step 6 for weighting and combining the first image and the second image from the imaging method 1 at a predetermined position in the screen; A simple image synthesizing method is provided, wherein an image compressing step 8 for compressing and an image transmitting step 9 for transmitting an output of the image compressing step 8 are performed in a continuous procedure. 8. The simple image synthesizing method according to claim 7, comprising: a step of recording a signal of the imaging device on a first recording medium; and a step of reproducing an image from the first recording medium. Playback image Into a first image by reproducing the first image from the first recording medium, and at the same time, digitally convert a signal of the imaging device 1 into a second image, and convert the two digital images 10. A simple image synthesizing method, wherein a simple image synthesizing method is provided, wherein a superimposed image is synthesized with a position in a screen set in advance.
According to the invention, in the simple image synthesizing method according to claim 7, a portable video camera as the imaging device 1;
It has first and second recording media 3M and 10M that can be recorded and reproduced, and can reproduce a predetermined period, and the period is weighted and synthesized at a position in the screen that is preset for each reproduced image. A simple image synthesizing method characterized in that the second image captured from the imaging device 1 is displayed in the simple image synthesizing method according to claim 7. A simple image synthesizing method, characterized by comprising a step of displaying a preset synthesizing position boundary on the display screen simultaneously with the input image of the imaging device 1. ,
8. The simple image synthesizing method according to claim 7, wherein the first image recorded on the first recording medium 3 is digitally transferred to the second recording medium 10M by thinning out the frame and reducing the image size for a designated period. Recording, then digitally recording the image from the imaging device camera 1 or the second image recorded on the first recording medium 3M in the second recording medium 10M by thinning out the frame and reducing the image size, The weighting process set to the first image on the first image, the weighting process set to the second image is performed on the second image, and the weighted first image A simple image synthesizing method characterized by synthesizing and compressing a second image is provided. The invention according to claim 12 is the simple image synthesizing method according to claim 7, wherein Is the first recorded image recorded When choosing where to compression, there is provided a simple image synthesis method comprising the step of selecting from a temporally discontinuous recording place.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a simplified image synthesizing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a device having a low image processing capability, and FIG. 2 shows another embodiment of a device having a high image processing capability. 1 includes a video camera (imaging device, portable video camera) 1, an image recording processing unit 2, a first image recording unit (first recording medium 3M) 3, and an image reproduction processing unit. 4, digital conversion units 5 and 7, second image recording unit (second recording medium 10
M) 10, an image compression unit 12, an image transmission unit 13, and a composite image processing unit 11.

On the other hand, the apparatus shown in FIG.
Video camera (imaging device, portable video camera) 1, image recording processing unit 2, first image recording unit (first recording medium 3)
M) 3, image reproduction processing unit 4, digital conversion units 5, 7,
It is composed of a composite image processing section 6, an image compression section 8, and an image transmission section 9.

The embodiment of the apparatus having a low image processing capability shown in FIG. 1 performs the image processing in several stages as compared with the embodiment of the apparatus having a high image processing capability shown in FIG. Video camera 1
Thus, for example, a first image signal obtained by photographing a building construction site, a dam construction site, or the like is subjected to image processing and recording control by the image recording processing unit 2, and the first image signal of a video tape, a video disk, or the like. Is recorded in the first image recording unit 3 having the recording medium 3M.

In this case, a normal portable video camera (movie) records an image having higher quality than a transmission image described later. FIG. 3 shows the contents of the recorded image,
FIG. 3 is a conceptual diagram showing a time position of a transmission start and a synthesis start, which determine a portion for transmitting an image and a portion for arranging an explainer in a screen.

In the conceptual diagram of FIG. 3, the content 30 recorded on the first image recording section (first recording medium 3M) 3 of the portable video camera 1 is from a recording start position 31 to a recording end position 32. In the recorded contents 30, a portion to be transmitted is defined as a transmission start position 33 to a transmission end position 34. In addition, the portion where the staff members are arranged is set to be from the combination start position 35 to the combination end position 36.

In this embodiment, the coding rate of the finally compressed image is 384 kbps, and the size of the image is 352 × 240 for horizontal pixels × vertical pixels. The first image recording unit (first recording medium 3M) 3 in the image reproduction processing unit 4
, And control for reproduction. This reproduced image is digitally converted by the digital conversion unit 7 and the image size is calculated by dividing the number of horizontal pixels × the number of vertical pixels by 704 × 480.
Pixels and 352 × 24
The image size is set to 0, and digitally recorded in the second image recording unit 10 at a speed of 5 frames per second. The second recording medium 10M digitally recorded by the second image recording unit 10 is a large-capacity solid-state memory such as a memory card.

Next, the image of the explainer as a second image signal from the video camera 1 is digitally converted by the digital converter 5 and the image size is converted in the same manner as the first image signal.

The second image size may be recorded at the same image size 352 × 240 as the first image size,
Since the second image, which is the image of the explainer, is smaller than the first image, the image size is set to 128 × to save memory.
144. This second image is recorded on the second image recording unit 10 at 5 frames per second.

<Synthesized Image> The synthesized image processing section 11 of the present invention will be described below. FIG. 4 is a composite image image diagram showing an image of a composite image performed by the composite image processing unit 11. The second recording image 42 is superimposed on the first recording image 41, and the position where the second recording image 42 is superimposed is located at the center (middle) of the screen.

This position is set in X and Y coordinates before recording. A portion where the first recording image 41 occupies the weight coefficient of the first recording image of 1 (43), the second recording image 42
The first image component is 0% (weight coefficient is 0), and the second image component is the opposite of the weighting of the first recorded image 41. 100%
(45) where the second recorded image weight coefficient is 1 (weighted as 1) and the other portions where the first recorded image and the second recorded image each have a weighted coefficient (44) ).

FIG. 4 shows an example of the weighting factor in which the head portion of FIG. 4 is enlarged. FIG. 5 shows the weighting factor of the first recorded image, and FIG. 6 shows the weighting factor of the second recorded image. This weighting coefficient is set in advance, and in FIG. 5, the closer to the head portion 50 where the staff member is located, the smaller the weighting coefficient, and the weight inside the head becomes 0.

In FIG. 6, the weighting factor increases as the explanation member approaches the head portion 50, and the weight of the weight inside the head becomes 1. That is, the weight coefficient of the second recorded image is
1 is obtained by subtracting the weight coefficient of the first recorded image from 1.

Further, in order to clearly and clearly show the boundary between the first recorded image and the second recorded image, the vicinity of the boundary can be raised with light light blue or dark green. Alternatively, in order to emphasize the second recorded image, the weight coefficient of the second recorded image near the boundary is increased.

In this way, first, the first recorded image 4
1 is read from the first image recording unit 3 shown in FIG. 1, and weighting processing (multiplication) as shown in FIG. 5 is performed for each pixel according to the position (coordinate) in the screen, and then the second Recorded image 4
2 is read from the second image recording unit 10 in FIG. 1 and weighting processing as shown in FIG. 6 is performed.

After that, the first image and the second image are subjected to an addition process for each position (pixel) in the screen corresponding to the two images, so that two images can be synthesized. Such synthesis processing is performed from the synthesis start position 35 to the synthesis end position 36 in FIG. 3, and is recorded in the second image recording unit 10 again.

In the case of the addition (synthesis) processing, a coefficient is set so that the weighting coefficient of the first recorded image and the second recorded image is added to be 1 or more. If it is desired to emphasize the image a little, the saturation processing is performed after the addition processing of the first image and the second image.

The saturation processing means that when the luminance level is represented by 8-bit image data, the maximum possible value is 2
That is, a process of replacing the value larger than the addition result with 255 so that the minimum value becomes 55 at 55.

<Image Compression> Next, FIG. 7 shows a detailed block configuration of one embodiment of the image compression section 12 shown in FIG. The image compression unit 12 is configured to output an image signal (data)
A reference image memory 62 to which an input 61 is supplied, a motion detector 63 to which an image signal (data) input 61 is supplied to output a motion vector 72, a subtractor 64, and a DCT converter 6
5, a quantizer 66, an encoder 67 for outputting a compressed stream 73, an inverse quantizer 68, an inverse DCT transformer 69, an adder 70, and a predicted image memory 71.

Image compression is performed, for example, according to the MPEG1 standard (ISO / I
A method similar to EC / 1172-2) was used. The method compresses using the intra-coded frame (I) and the forward prediction coded frame (P). It is general that an I-frame is set every approximately 10 frames, and a P-frame is set for the rest.

Here, in order to simplify the description, a case of a unidirectional prediction P frame will be described. The image signal (data) input 61 is read out from the second image recording unit 10 in FIG. 1 and is an already synthesized image, that is, a position in the screen corresponding to the first image and the second image ( Pixel)
This is an image obtained by performing an addition process every time and combining two images. It is divided into macroblocks (MB) composed of 16 × 16 pixels, and each macroblock is divided into four 8 × 8 pixels.
Is divided into blocks (B).

First, for each macroblock (MB), a motion detector 63 is used between an image data input 61 and an already compressed past reference image 62 to obtain a motion vector 72 having a minimum error between the two. Is calculated.

According to the motion vector 72, motion compensation data is created from the image data of the predicted image memory 71, which is the result of the encoding and decoding, and each pixel is inputted by the image signal (data) input 61 and the difference calculator 64. Is calculated.
The difference value for each block is subjected to DCT transformation by a DCT calculator 65, and is further quantized by a quantizer 66. Then, the output of the quantizer 66 is Huffman-coded by the encoder 67 and the compressed stream 73 is output.

On the other hand, the data quantized by the quantizer 66 is inversely quantized by the inverse quantizer 68 and inverse DCT-transformed by the inverse DCT unit 69. Adder 70 adds the motion compensated data from the data
To obtain the next predicted image data. This predicted image data should match the result of the decompression work.

The output of the motion vector 72 and the quantizer 66 are Huffman-coded by an encoder 67 to become a compressed stream 73. The compressed stream 73 output from the image compression unit 12 is recorded again by the second image recording unit 10.

<Transmission> The compressed stream recorded in the second image recording unit 10 is subjected to transmission processing by a central processing unit (CPU) constituting the image transmission unit 13 or a direct transmission unit, and is transmitted to the remote Sent to the ground. The second image recording unit 10 is integrally formed with the image transmission unit 13, and the output of the second image recording unit 10 is automatically or manually switched and connected to the image transmission unit 13. And sent immediately to a remote location.

<Others> In the above description, the case of an apparatus having a low image processing capability has been described with reference to FIG. 1, but an embodiment of an image synthesizing apparatus having a high image processing capability is also shown in FIG.
Shown together. The image of the video camera 1 is stored in an image recording processing unit 2
Performs various controls and image processing, and performs high-quality recording on the first recording medium 3M.

Next, the video camera 1
Shoots a staff member. The signal reproduced from the first recording medium 3M is subjected to reproduction processing by the image reproduction processing unit 4 and digital conversion by the digital conversion unit 7 to become first image data of the composite image processing unit 6. At the same time, the signal from the video camera 1 is digitally converted by the digital converter 5 to become second image data.

The second image has a smaller screen occupancy than the first image, and fits into the first image. The first image data and the second image data are added to a predetermined position in the screen with a set weight to obtain a composite image. The image is compressed by the image compression unit 8, and the image is transmitted by the image transmission unit 9.

As shown in FIG. 2, if the image processing capability is high, data exchange with the second image recording unit can be reduced. For example, the combined image processing unit 11 and the image compression unit 12 shown in FIG. 1 can be processed at one time.
Therefore, the combining and compression processes can be changed according to the image processing capability.

Alternatively, as shown in FIG. 2, the second image from the video camera 1 is reproduced while reproducing the first image recorded in the first image recording unit 3 without having the second image recording unit. The images can be captured, synthesized, compressed and transmitted.

If it is possible to check whether or not the explainer is picked up at a preset position when the second image is captured, a failure such that the second image protrudes from the set position and range will occur. Can be reduced.

Therefore, when the second image is captured,
By displaying the boundary for cutting out in white or blue together with the figure of the explainer captured on the display screen, failure in capturing the second image can be eliminated.

In FIG. 3, a transmission start position is designated,
When taking in the second recording medium 10M, the taking position does not have to be continuous in time.
If a plurality of capture locations and their order are selected from the first recording medium 3M, only necessary portions can be transmitted,
It is possible to convey the situation on the site to those who see it more accurately.

[0040]

As described above, the simplified image synthesizing apparatus (method) of the present invention synthesizes a moving image and transmits a compressed image thereof. It can be easily realized by an integrated configuration and procedure.

Further, according to the present invention, a combined image of two images can be easily transmitted by one image pickup apparatus. Therefore, in a case where a moving image of an explainer is combined with a recorded moving image of a building site and transmitted. This allows the viewer to understand the situation at the site more accurately, and can easily use it to enhance the understanding.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a simple image synthesizing apparatus (an apparatus having a low image processing capability) according to the present invention.

FIG. 2 is a block diagram showing another embodiment of a simplified image synthesizing apparatus (an apparatus having a high image processing capability) according to the present invention.

FIG. 3 is a conceptual diagram showing a temporal position of the start of transmission and the start of synthesis of the simplified image synthesis device of the present invention.

FIG. 4 is an image diagram of a composite image showing an example of an image of a composite processing image of the simplified image composition device of the present invention.

FIG. 5 is an explanatory diagram showing an example of a weight coefficient (head portion) of a first recorded image.

FIG. 6 is an explanatory diagram showing an example of a weight coefficient (head portion) of a second recorded image.

FIG. 7 is a block diagram showing an embodiment of an image compression unit of the simplified image synthesizing apparatus according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 video camera (imaging device, portable video camera) 2 image recording processing unit 3 first image recording unit (recording step) 3M first recording medium 4 image reproduction processing unit (reproduction selecting step) 5, 7 digital Conversion unit 6,11 Synthetic image processing unit (synthesis processing step) 8,12 Image compression unit (image compression step) 9,13 Image transmission unit (image transmission step) 10 Second image recording unit 10M Second recording medium 30 Contents recorded on the first recording medium 31 Recording start position 32 Recording end position 33 Transmission start position 34 Transmission end position 35 Synthesis start position 36 Synthesis end position 37 Transmission contents recorded on the second recording medium 38 Second Description contents recorded on the recording medium 39 Contents of the compressed stream to be compressed and transmitted 50 Head part of the second recorded image 61 Input image data 62 Reference image Image memory 63 Motion detector 64 Subtractor 65 DCT converter 66 Quantizer 67 Encoder 68 Inverse quantizer 69 Inverse DCT converter 70 Adder 71 Predictive image memory 72 Motion vector 73 Compressed stream

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Claims (12)

[Claims] 1. A simple image synthesizing device for synthesizing and transmitting supplied input images, comprising: a recording / reproducing means having a first recording medium for recording a signal from one imaging device as a first image; Weighting synthesis processing means for weighting and synthesizing the first image already recorded by the recording / reproducing means and the second image from the imaging device at a preset position in the screen; A simple image synthesizing apparatus, wherein an image compressing means for compressing an output of the weighting synthesizing means and an image transmitting means for transmitting an output of the image compressing means are integrally formed. 2. The simple image synthesizing apparatus according to claim 1, further comprising a recording / reproducing means for recording a signal of said imaging device on a first recording medium and reproducing an image from said first recording medium. Digitally converting the reproduced first image and digitally converting the second image of the imaging device,
A simplified image synthesizing apparatus, wherein the two converted digital images are weighted and synthesized at a predetermined position in a screen. 3. The simple image synthesizing apparatus according to claim 1, further comprising a portable video camera as said image pickup apparatus, and first and second recording media capable of recording and reproducing, wherein a predetermined period is set. A simple image synthesizing apparatus characterized in that reproduction can be performed, and during that period, weighting synthesis is performed and compression is performed at a predetermined position in the screen for each reproduction image. 4. The simple image synthesizing apparatus according to claim 1, further comprising: means for displaying a second image captured from said imaging device, wherein said display image is set in advance on a display screen simultaneously with an input image of said imaging device. A simple image synthesizing apparatus, comprising means for displaying a synthesized position boundary. 5. The simplified image synthesizing apparatus according to claim 1, wherein the first image recorded on the first recording medium is subjected to frame thinning and image size reduction for a designated period to perform second recording. Digitally recording on a medium, and then digitally recording on the second recording medium the image from the imaging device or the second image recorded on the first recording medium by thinning out the frame and reducing the image size, The weighting process set to the first image is performed on the first image, the weighting process performed on the second image is performed on the second image, and the weighted first image and the weighted first image are processed. A simple image synthesizing apparatus characterized in that two images are synthesized and compressed. 6. The simplified image synthesizing apparatus according to claim 1, wherein when selecting a location to be compressed from the first recorded image recorded on the first recording medium, the recording is performed from a temporally discontinuous recording location. A simple image synthesizing device having a selecting means. 7. A simple image synthesizing method for synthesizing and transmitting supplied input images, comprising: a recording / reproducing step having a first recording medium for recording a signal from one imaging device as a first image. Weighting synthesis processing step of weighting and synthesizing the first image already recorded from the recording / reproducing step and the second image from the imaging device at a preset position in the screen; A simple image synthesizing method, wherein an image compressing step of compressing an output of the weighting synthesizing step and an image transmitting step of transmitting an output of the image compressing step are performed in a continuous procedure. 8. The simple image synthesizing method according to claim 7, further comprising a recording / reproducing step of recording a signal of the imaging device on a first recording medium and reproducing an image from the first recording medium. Digitally converting the reproduced first image and digitally converting the second image of the imaging device,
A simple image synthesizing method, wherein the two converted digital images are weighted and synthesized at a predetermined position in a screen. 9. The simple image synthesizing method according to claim 7, further comprising a portable video camera as said imaging device, and first and second recording media capable of recording and reproducing, for a predetermined period. A simple image synthesizing method characterized by performing weighting synthesis at a predetermined position in a screen for each reproduced image and compressing the reproduced image during that period. 10. The simple image synthesizing method according to claim 7, further comprising the step of displaying a second image captured from said image pickup device, wherein said display image is set in advance on a display screen simultaneously with an input image of said image pickup device. And displaying a synthesized position boundary. 11. The simple image synthesizing method according to claim 7, wherein the first image recorded on the first recording medium is subjected to frame thinning and image size reduction for a designated period to perform second recording. Digitally recording on a medium, and then digitally recording on the second recording medium the image from the imaging device or the second image recorded on the first recording medium by thinning out the frame and reducing the image size, The weighting process set to the first image is performed on the first image, the weighting process performed on the second image is performed on the second image, and the weighted first image and the weighted first image are processed. A simple image combining method characterized by combining and compressing two images. 12. The simple image synthesizing method according to claim 7, wherein when selecting a location to be compressed from the first recorded image recorded on the first recording medium, the recording is performed from a temporally discontinuous recording location. A simple image synthesizing method, comprising a step of selecting.