JPH0832944A - Image transmission equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] Exclude some image areas hidden in the display area of other images from the main target image information so that the main target image information can be transmitted in high quality or in a short time. . An image of a subject 12 photographed by a camera 13 is displayed as an image 4 in a window 3 in a window 1 displaying a main target image 2 by an image synthesizing device 5. The receiving device 6 transmits the relative position information and the shape information of the windows 1 and 3 to the transmitting device 9 via the transmission path 8, and the transmitting device 9 does not need to correspond to the window 3 from the image of the subject 11 captured by the camera 10. The image 14 excluding these regions is encoded and transmitted to the receiving device 6 via the transmission path 7. The encoded and transmitted image 15 is input from the receiving device 6 to the image synthesizing device 5 for the main target image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image transmission device for transmitting moving images, still images, and document image images used in video conferences, video telephones, remote monitoring, and the like.

[0002]

2. Description of the Related Art FIG. 2 is a schematic block diagram showing the structure of a conventional image transmission apparatus. In FIG. 2, the image of the subject 31 taken by the camera 32 is
It is displayed as an image 24 in the window 23 in the window 21 displaying the main target image 22. The transmission device 28 transmits the image 33 of the subject 30 captured by the camera 29 to the transmission path 2
Then, the data is encoded and transmitted to the receiving device 26 via the A. The transmitted image 34 is input from the receiving device 26 to the image synthesizing device 25 for the main target image.

[0003]

However, in the above-mentioned conventional image transmission apparatus, as shown in FIG. 2, a window displaying the image 24 of the subject 31 superimposed on the window 21 displaying the main target image 22. Since the image information of the area hidden by 23 is also encoded and transmitted by the transmission device 28, unnecessary image information needs to be encoded and transmitted, and the image information of the required area of the main target image 22 is displayed with high image quality. Alternatively, there is a problem in that it cannot be encoded and transmitted in a short time.

The present invention solves such a conventional problem, and is an excellent image transmission apparatus capable of high-quality or short-time coded transmission of image information of an area in which a main target image is displayed. It is intended to provide.

[0005]

In order to achieve the above object, the present invention has a function of transmitting a relative position information and a shape information of a window of another image which hides a window displaying a main target image through a transmission path. To the receiving device, and the transmitting device 9 is provided with a function of encoding and transmitting image information in which unnecessary regions are excluded from the main target image based on the relative position information and the shape information.

[0006]

Operation: A window for displaying a main target image is hidden. A window area of another image is excluded from the main target image area, and an image excluding a part of the display area of the other image is excluded. By encoding and transmitting the information, the image information can be encoded and transmitted with high image quality or in a short time.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram showing the configuration of an image transmission apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 13 is a camera for photographing the subject 12, and image information photographed by the camera 13 is sent to the image synthesizing device 5. Further, the image information 15 received by the receiving device 6 is sent to the image synthesizing device 5, and the image synthesizing device 5 synthesizes the two images described above, and the subject 12 is displayed on a part of the window 1 for displaying the main target image 2. The window 3 for displaying the photographed image information 4 is embedded and displayed. The receiving device 6 transmits the relative position information and the shape information of the windows 1 and 3 to the transmitting device 9 via the transmission path 8. Image information of the subject 11 photographed by the camera 10 is sent to the transmitting device 9, and the transmitting device 9 is based on the relative position information and the shape information of the window 1 and the window 3 transmitted from the receiving device 6. The image information 14 in which the unnecessary area corresponding to the window 3 is excluded is generated from the image of the subject 11 captured in (1), and is encoded and transmitted to the receiving device 6 via the transmission path 7.

The transmitter may be configured to fix the relative position information and the shape information of the area to be excluded from the coded transmission and to perform the coded transmission.

[0009]

As described above, according to the present invention, unnecessary areas are excluded from the image information of the main object to be encoded and transmitted, and the area to be encoded and transmitted is limited. The image information can be encoded and transmitted in high quality in a short time.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an image transmission device according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a conventional image transmission device.

[Explanation of symbols]

 1 window (for main target image) 2 main target image 3 window (for subject 12) 4 image (for subject 12) 5 image synthesizing device 6 receiving device 7 transmission line (from transmitting device to receiving device) 8 transmission line (receiving device) To a transmission device) 9 transmission device 10 camera (for subject 11) 11 subject 12 subject 13 camera (for subject 12) 14 image information (transmission) 15 image information (reception)

Claims (4)

[Claims] 1. An image transmission apparatus comprising a transmission apparatus that performs encoded transmission by excluding a part of a display area of another image from image information of a main object. 2. A receiving device, which receives image information of a main target from the transmitting device, and also transmits presence / absence of overlapping of a plurality of display windows, relative position information, and shape information to the transmitting device. The image transmission device described. 3. The image transmission apparatus according to claim 1, wherein the transmission apparatus performs coded transmission in which relative position information and shape information of an area to be excluded from coded transmission are fixed. 4. The image transmission apparatus according to claim 1, wherein the transmission apparatus performs the encoded transmission control by receiving the relative position information and the shape information of the area to be excluded from the encoded transmission.