JP2012034099A - Data transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a load on a network concerning image data transmission by a data transmission device.SOLUTION: A camera device 100 transmits to a user terminal 200, a thumbnail image of a whole image which is imaged by an imaging device 101 and a zoom image obtained by segmenting a part of the thumbnail image. A position to be the object of the zoom image in the whole image is changed based on an operation in the user terminal 200.

Description

  The present invention relates to a data transmission apparatus and a video camera, and more particularly to a data transmission apparatus and a video camera that transmit image data via a network.

  Various techniques for zooming in on a portion of interest in a camera image have been conventionally disclosed. For example, regarding zoom processing for an image shot with a digital camera, Japanese Patent Application Laid-Open No. 2004-23631 discloses a zoom center position and a zoom magnification with respect to an image shot with a shooting lens in a digital camera. A technique for photographing at a desired angle of view by designating and pressing a shutter button is disclosed.

Japanese Patent Laid-Open No. 2004-23631

  By the way, when a camera image for surveillance use or the like is distributed over a network, the user may want to check not only the zoom image but also the entire image. Therefore, in addition to the zoom image obtained by Patent Document 1, it is conceivable to transmit a full angle image captured by the lens.

  However, when distributing camera images over the network, if the image size is large, such as for megapixels, the amount of data to be distributed increases and the load on the network increases, resulting in instability of image updates on the network. In addition, there may be adverse effects on responses such as control via other networks of the camera body, and also on other network devices on the same network. In addition, when recording data distributed over a network, a large capacity server is required. In addition, if the number of cameras is increased, the load on the network will increase. That is, simply transmitting a full-angle image and a zoom image causes a problem of increasing the load on the network.

  The present invention has been conceived in view of such a situation, and an object thereof is to suppress a load on a network while providing sufficient information to a user in transmission of image data by a data transmission apparatus. .

  A data transmission device according to an aspect of the present invention is a data transmission device that transmits an image to a terminal via a network, and includes a storage unit that stores a first image and a first stored in the storage unit. First generation means for generating a second image obtained by reducing the image of the first image, first transmission means for transmitting the second image to the terminal, and a cutout position for cutting out the partial image from the first image is set. Setting means; clipping means for cutting out a partial image from the first image; second generation means for generating a third image of a predetermined size based on the partial image; and second transmission for transmitting the third image to the terminal And when the size of the partial image corresponding to the cut-out position set by the setting unit is smaller than the predetermined size, the second generation unit performs an enlargement process on the partial image and outputs the first image of the predetermined size. Generate 3 images If the size of the corresponding partial image to the set cutout position by setting means is larger than a predetermined size to generate a third image of a predetermined size by performing a reduction process on the partial image.

  In the data transmission device of the present invention, the setting unit further includes a reception unit that receives designation of a desired cutout position for the second image, and the third image is based on the received desired cutout position. Is preferably set such that the cutout position is included in the first image.

  In the data transmission device of the present invention, the second generation unit may generate the third image to be generated when the size of the partial image corresponding to the cutout position set by the setting unit is smaller than a predetermined size. Generated when the partial image is enlarged so that the center of gravity is the same as the center of gravity of the partial image, and the size of the partial image corresponding to the cutout position set by the setting unit is larger than the predetermined size The partial image is reduced so that the centroid of the third image is the same as the centroid of the partial image, and the setting unit corrects the cutout position so that the third image is included in the first image. It is preferable.

  In the data transmitting apparatus of the present invention, it is preferable that the accepting unit accepts the designation of the cutout position from the terminal.

  The data transmission apparatus of the present invention further includes a specifying unit that specifies a region where the subject exists in the first image, and the setting unit uses the position including the subject specified by the specifying unit as the designation of the cutout position. It is preferable to accept.

  A data transmission device according to another aspect of the present invention is a data transmission device that transmits an image to a terminal via a network, and includes a storage unit that stores a first image, and a first stored in the storage unit. First generation means for generating a second image obtained by reducing the image of the first image, first transmission means for transmitting the second image to the terminal, and a cutout position for cutting out the partial image from the first image is set. A setting unit; a cutout unit that cuts out a partial image from the first image; a second generation unit that generates a third image having a predetermined resolution based on the partial image; and a second unit that transmits the third image to the terminal. The transmission unit and the second generation unit convert the resolution so that the resolution of the partial image corresponding to the cut-out position set by the setting unit becomes a predetermined resolution, and generate a third image.

  The data transmission apparatus according to the present invention preferably further includes an imaging unit that images the subject, and the first image is preferably an image based on an image captured by the imaging unit.

  According to the above configuration, the data transmission apparatus transmits image data for partially displaying a detailed image while reducing the entire amount of the image captured by the imaging unit to reduce the data amount. Thereby, it is possible to suppress a load on the network while providing sufficient information to the user.

(A) is a figure which shows schematic structure of a data transmission system including the network camera apparatus which is one Embodiment of the data transmission apparatus of this invention, (B) is the data by the network transmission part of (A). It is a figure which shows typically the transmission aspect of. It is a figure which shows typically the hardware constitutions of the user terminal of FIG. 1 (A). It is a figure which shows an example of the screen displayed on the display part of the terminal of FIG. (A) is an enlarged view of the thumbnail screen of FIG. 3, and (B) is a diagram schematically showing the entire image data generated by the image sensor of FIG. 1 and stored in the video memory. It is a figure for demonstrating the change direction of the extraction position in the image data memorize | stored in the video memory of FIG. It is a figure for demonstrating the process for zooming out the zoom image displayed on the display part of the user terminal of FIG. It is a figure for demonstrating the process for zooming in on the zoom image displayed on the display part of the user terminal of FIG. It is a figure for demonstrating the process for zooming out the zoom image displayed on the display part of the user terminal of FIG. It is a flowchart of the image cutting-out process performed in the camera apparatus of FIG. It is a figure for demonstrating the content of step S90 of FIG. It is a figure which shows an example of the modification of the camera apparatus of FIG. It is a figure which shows the other example of the modification of the camera apparatus of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In each figure, elements having the same function are denoted by the same reference numerals, and description thereof will not be repeated.

[1. Data transmission system]
FIG. 1A shows a schematic configuration of a data transmission system including a network camera device (hereinafter simply referred to as “camera device”) which is an embodiment of the data transmission device of the present invention.

  In the data transmission system, the camera device 100 transmits an image captured by the image sensor 101 to the user terminal 200 via the network 300. The camera device 100 is realized as a network surveillance camera, for example.

[2. Camera device]
Referring to FIG. 1A, a camera device 100 includes an image sensor 101, a video memory 102, an image cutout processing unit 111, a zoom processing unit 112, a resizing processing unit 113, and an entire image resizing processing unit. 114, codecs 121 and 122, network sending unit 130, receiving unit 131, and writing processing unit 140.

  In the camera device 100, image data of an image captured in the entire effective field angle area of the image sensor 101 is taken into the video memory 102 at certain time intervals.

  The entire image resizing processing unit 114 generates a thumbnail image of the image data captured in the video memory 102.

  On the other hand, the image cutout processing unit 111 cuts out part of the image data captured in the video memory 102 based on an operation for changing the cutout position in the user terminal 200. In addition, the zoom processing unit 112 cuts out part of the image data captured in the video memory 102 based on the zoom-in or zoom-out operation on the user terminal 200. The resizing processing unit 113 matches the image data cut out by the image cutting processing unit 111 or the zoom processing unit 112 with a size of a zoom screen 21A (for example, VGA (Video Graphics Array) size) described later of the user terminal 200. And resize.

  The codec 121 converts the image data resized by the resize processing unit 113 into, for example, H.264. The data is encoded into the H.264 format and output to the network transmission unit 130. The codec 122 encodes the thumbnail image generated by the entire image resizing processing unit 114 into, for example, a JPEG (Joint Photographic Experts Group) format, and transmits the encoded image to the network transmission unit 130.

  The network transmission unit 130 transmits the data encoded by the codec 121 and the data encoded by the codec 122 to the user terminal 200 via the network 300, for example, by multi-streaming.

  FIG. 1B schematically shows a data transmission mode by the network transmission unit 130. In FIG. 1B, “1” indicates image data output from the codec 121, “2” indicates image data output from the codec 122, and the horizontal axis indicates the passage of time.

  The amount of image data output from the codec 121 for one image captured by the image sensor 101 is larger than the amount of image data output from the codec 122. For example, when the amount of data in the former is 10 times that in the latter, as shown in FIG. 1 (B), the network transmission unit 130 transmits image data from the codec 122 for one unit, and then from the codec 121. Image data is continuously output for 10 units. The network transmission unit 130 determines the number of data units for continuously transmitting the image data from the codec 122 based on, for example, the ratio of the data amounts of these image data. In this manner, the network transmission unit 130 alternately transmits the image data from the codec 122 and the image data from the codec 121.

  The writing processing unit 140 can read / write information on a recording medium 141 configured to be detachable from the camera device 100 main body. The writing processing unit 140 can write the image data output from the codec 121 and / or the image data output from the codec 122 into the recording medium 141. Note that the recording medium 141 may be configured separately from the camera device 100, or may be configured integrally such as being incorporated therein.

  The image sensor 101 images a monitoring target (such as a room). The image sensor 101 generates image data of a captured image and outputs the image data to the video memory 102.

  The camera device 100 only needs to hold the image data output from the image sensor 101 in the video memory 102 for processing. From this point of view, the camera apparatus 100 may include an image sensor 101 as illustrated in FIG. 1A, or may include the image sensor 101 and receive image data from the image sensor 101. May be.

[3. Configuration of user terminal]
FIG. 2 is a diagram schematically illustrating a hardware configuration of the user terminal 200.

  Referring to FIG. 2, a user terminal 200 processes a signal related to data transmission / reception by a control unit 250 that controls the overall operation of the user terminal 200, an antenna 241 for data transmission / reception, and the antenna 241. The communication control unit 240, the storage unit 260 including a flash memory, the operation unit 210, the display unit 220, the display control unit 221 that controls the display content on the display unit 220, the speaker 230 that outputs sound, and the speaker 230 An audio output control unit 231 for controlling audio is included. Control unit 250 includes a CPU (Central Processing Unit).

  The storage unit 260 includes a program storage unit 261 that stores a program executed by the CPU of the control unit 250, a setting content storage unit 262 that stores various data such as setting content for the user terminal 200, and the program storage unit 61. A data storage unit 263 that stores various data necessary for executing the stored program is included.

  The operation unit 210 may be configured integrally with a display device such as a touch panel, or may be configured by an input device such as a mouse or a keyboard. The display unit 220 is configured by a display device such as a liquid crystal display.

[4. Display contents on user terminal]
FIG. 3 is a diagram illustrating an example of a screen displayed on the display unit 220 of the terminal 200.

  Referring to FIG. 3, display screen 20 includes a thumbnail screen 22 that displays a thumbnail image of the entire image captured by image sensor 101, and a display field that displays a zoom image of a portion of the image displayed on thumbnail screen 22. 21. In the display column 21, a zoom image is displayed on the zoom screen 21A.

  The thumbnail screen 22 includes a display unit 22A that displays thumbnail images. A frame 219 is displayed on the display unit 22A. A frame 219 indicates a position corresponding to the zoom image displayed on the zoom screen 21A.

  The thumbnail screen 22 includes an up key 213, a down key 214, a left key 215, and a right key 216 for changing the position of the frame 219 in the display unit 22A.

  Further, a wide key 211 and a telekey 212 for changing the zoom magnification of the zoom image displayed on the zoom screen 21A are included. The wide key 211 is operated to zoom out the zoom screen displayed on the zoom screen 21A. The tele key 212 is a key operated when it is desired to zoom in on the zoom image displayed on the zoom screen 21A.

  In the user terminal 200, when the display unit 220 is configured by a touch panel, the user can operate each key by directly pressing each key. On the other hand, each key displayed on the display unit 220 may be operated by aligning a pointer by a mouse operation and clicking. When the display unit 220 is configured by a touch panel, the up key 213, the down key 214, the left key 215, the right key 216, the wide key 211, and the telekey 212 constitute the operation unit 210.

[5. [Crop image]
The camera device 100 cuts out a part of the image captured by the image sensor 101 and generates a zoom image. With reference to FIG. 4 (A) and FIG. 4 (B), the change of the position of the image cut-out will be described.

  4A is an enlarged view of the thumbnail screen 22 of FIG. 3, and FIG. 4B is a diagram schematically showing the entire image data generated by the image sensor 101 and stored in the video memory 102. As shown in FIG. .

  4A, when right key 216 is operated, control unit 250 moves the frame display position from frame 219A to frame 219B, that is, to the right. Arrow A1 indicates the moving direction of the frame. In addition, the control unit 250 transmits information that the right key 216 has been operated to the camera device 100. The camera device 100 receives the information by the receiving unit 131.

  The receiving unit 131 analyzes the changed position information and outputs it to the image cutout processing unit 111. Based on the analysis result, the image cutout processing unit 111 changes the cutout position in the image data 10 (see FIG. 4B) from the image sensor 101 stored in the video memory 102 from the frame 11A to the frame 11B. Is done.

  As can be understood from FIG. 4A, on the thumbnail screen 22, the frame 219A can be moved to the user's favorite position in the vertical and horizontal directions.

  As described above, the camera device 100 changes the cutout position in the image data stored in the video memory 102 based on the operation on the user terminal 200. Note that the position change is not limited to the rightward movement described with reference to FIG. As shown in FIG. 5, it can be changed in any of up, down, left and right directions. In FIG. 5, the image data generated by the image sensor 101 and stored in the video memory 102 is indicated by the image data 10, and the position to be cut out is indicated by the frame 11. Moreover, the changing direction of the cutting position is schematically shown as double arrows A3 and A4.

[6. Zoom out / Zoom in]
In this specification, “zoom out” means to reduce the photographing magnification of the subject image, that is, to reduce the photographed image, and is also referred to as zoom back. Zooming in means increasing the shooting magnification of the subject image, that is, enlarging the shot image, and is also called zooming up.

(1) Zoom out When the user of the user terminal 200 operates the wide key 211 to zoom out the display of the zoom screen displayed on the zoom screen 21A, the image data stored in the video memory 102 is clipped. The change of position will be described.

  FIG. 6A shows an example of the display mode of the display unit 22 </ b> A of the thumbnail screen 22. When the wide key 211 is operated while the frame 219C is displayed on the display unit 22A, the four corners of the frame 219C expand as shown by the arrow A5 so that the frame 219D is displayed instead of the frame 219C. Become. The frame 219C and the frame 219D are similar, and the ratio of the lengths of the sides is predetermined. Then, the fact that the wide key 211 has been operated is transmitted from the user terminal 200 to the camera device 100.

  FIG. 6B schematically shows the overall configuration of image data generated by the image sensor 101 and stored in the video memory 102.

  When the receiving unit 131 receives information that the wide key 211 has been operated, the information is transmitted to the zoom processing unit 112.

  In accordance with the information, the zoom processing unit 112 changes the clipping range that is the basis of the zoom image in the image data 10 from the region 11C to the region 11D, as shown in FIG. 6B. Then, the image data in the cut-out range after the change is cut out from the image data 10 and sent to the resizing processing unit 113.

  The region 11C and the region 11D are both rectangular, and their centroids coincide with each other at P1. The shapes of the region 11C and the region 11D are similar, and the ratio is equal to the similarity ratio between the frame 219C and the frame 219D.

  When the wide key 211 is operated and the process for zooming out as described above is executed, the range to be cut out in the image data 10 becomes wider as described with reference to FIG. . Note that the image data sent to the resizing processing unit 113 is resized to a certain display size. Thereby, when the wide key 211 is operated, the angle of view of the image displayed on the zoom screen 21A is widened, but the resolution is lowered.

(2) Zooming in When the user of the user terminal 200 operates the telekey 212 to zoom in on the display of the zoom screen displayed on the zoom screen 21A, the change of the cut-out position in the image data stored in the video memory 102 Will be described.

  FIG. 7A shows an example of the display mode of the display unit 22 </ b> A of the thumbnail screen 22. When the tele key 212 is operated while the frame 219E is displayed on the display unit 22A, the four corners of the frame 219E are narrowed as indicated by the arrow A6, and the frame 219F is displayed instead of the frame 219E. The frame 219E and the frame 219F are similar, and the ratio of the lengths of the sides is determined in advance. Then, the fact that the tele key 212 has been operated is transmitted from the user terminal 200 to the camera device 100.

  FIG. 7B schematically shows the overall configuration of image data generated by the image sensor 101 and stored in the video memory 102.

  When the reception unit 131 receives information that the telekey 212 has been operated, the information is transmitted to the zoom processing unit 112.

  In accordance with the information, the zoom processing unit 112 changes the clipping range that is the basis of the zoom image in the image data 10 from the region 11E to the region 11F, as shown in FIG. 7B. Then, the image data in the cut-out range after the change is cut out from the image data 10 and sent to the resizing processing unit 113.

  The region 11E and the region 11F are both rectangular, and their centroids coincide with each other at P2. Moreover, the shape of the area | region 11E and the area | region 11F is similar, The ratio is equal to the similarity ratio of the frame 219E and the frame 219F.

  When the telekey 212 is operated and the above zoom-in process is executed, the range to be cut out in the image data 10 becomes narrow as described with reference to FIG. Note that the image data sent to the resizing processing unit 113 is resized to a certain display size. Accordingly, when the telekey 212 is operated, the image displayed on the zoom screen 21A has a narrow angle of view, but the resolution increases.

(3) Special Processing at Zoom-out As described with reference to FIGS. 6A and 6B, when the wide key 211 is operated on the user terminal 200, zooming in the image data 10 is performed. The area to be imaged is expanded so that the shape is similar to the original area and the center of gravity is equal. Here, as a result of the enlargement as described above, FIGS. 8A to 8D will be described with respect to processing when a part of a region to be newly zoomed is positioned outside the image data 10. The description will be given with reference.

  On the thumbnail screen 22 in FIG. 8A, a frame 219P is displayed that indicates the relative position of the area to be zoomed in the image data 10.

  In this state, when the wide key 211 is operated and this information is transmitted to the camera device 100, the zoom processing unit 112 converts the region 11P that is the target of the zoom image into the region 11Q, as shown in FIG. 8B. Spread. The region 11P and the region 11Q have a point P3 as a common center of gravity and are similar in shape.

  Here, a part of the region 11Q (a hatched portion 11X) is located outside the image data 10.

  When a part of the changed area 11Q is located outside the image data 10, the zoom processing unit 112 further moves the changed area as shown as an area 11R in FIG. 8C.

  The area 11R is obtained by moving the area 11Q to the right side by a dimension that the area 11Q protrudes to the left side from the image data 10. The region 11R and the left end of the image data 10 match. Point P4 is the center of gravity of region 11R. The point P4 has moved to the right with respect to the point P3 by the amount that the region 11R has moved to the right with respect to the region 11Q.

  Since the zoom processing unit 112 has changed the target area of the zoom image to the area 11R, the display of the frame on the display unit 22A of the thumbnail screen 22 before and after the wide key 211 is operated is changed from the frame 219P to the frame 11R. It is changed to 219R. The shapes of the frames 219P to 219R are similar, but their centroids do not match. Similar to the relationship between the region 11P and the region 11R, the center of gravity of the frame 219R is shifted to the right with respect to the center of gravity of the frame 219P.

[7. Image cropping process]
FIG. 9 is a flowchart of processing (image cutting processing) executed to change the zoom image displayed on the zoom screen of the display screen 20 in the camera device 100.

  Referring to FIG. 9, in step S <b> 10, in receiving unit 131, it is determined whether or not information indicating that a zoom-in operation (operation on telekey 212) has been performed in user terminal 200 is performed. The process proceeds to S20, and if it is determined that it has not been received, the process proceeds to step S60.

  In step S20, it is determined whether or not the image currently displayed as a zoom image has been enlarged at the maximum magnification that can be enlarged by the zoom processing unit 112. If so, the process proceeds to step S40. If it is determined that this is not the case, the process proceeds to step S30.

  In step S40, the zoom processing unit 112 cuts out image data of the minimum field angle image and advances the process to step S50. The minimum angle-of-view image is an image having a data amount that is enlarged at the maximum magnification that can be enlarged by the resizing processing unit 113 and becomes the display size of the zoom screen 21A.

  In step S <b> 30, as described with reference to FIG. 7B, the zoom processing unit 112 sets the target area of the zoom image in the image data stored in the video memory 102 as the target. The image is narrowed and cut out from the area, and the process proceeds to step S50.

  In step S50, the resizing processing unit 113 resizes the image cut out in step S30 or step S40 to a size to be displayed on the zoom screen 21A of the user terminal 200, and advances the process to step S150.

  On the other hand, in step S60, the receiving unit 131 determines whether or not there has been an operation for zooming out (operation on the wide key 211) from the user terminal 200. If it is determined that the operation has been performed, the process proceeds to step S70. If determined, the process proceeds to step S130.

  In step S70, the zoom processing unit 112 determines whether or not the image data stored in the video memory 102 and the region currently targeted for the zoom image have reached the edge of the image in both the vertical direction and the horizontal direction. If it is determined that it has been reached, the process proceeds to step S110. If it is determined that none has been reached, the process proceeds to step S80.

  In step S110, the zoom processing unit 112 cuts out a predetermined maximum angle-of-view image from the image stored in the video memory 102, and advances the process to step S120. Note that the maximum angle-of-view image is, for example, the entire image generated by the image sensor 101 and stored in the video memory 102.

  In step S80, the zoom processing unit 112 matches one of the vertical direction and horizontal direction of the region in the image data stored in the video memory 102, which is the target of the zoom image, with the stored image. If it is determined whether or not they match, the process proceeds to step S90, and if they do not match, the process proceeds to step S100.

  In step S90, the zoom processing unit 112 enlarges the area in the image data stored in the video memory 102, which is the target of the zoom image, and advances the process to step S120. Here, in step S80, the image data stored in the video memory 102 and the side where the end portion has not reached, as shown in FIG. Enlarge. On the other hand, in step S80, in the direction in which the image data stored in the video memory 102 reaches the end, the opposite side is doubled to be a target area of a new zoom image.

  Specifically, for example, as illustrated in FIG. 10, a case where the current zoom image target area reaches the lower end of the image data stored in the video memory 102 will be described.

  In this case, if the area 11M is to be expanded as described with reference to FIG. 6, a part of the area 11M protrudes downward from the image data 10 by the dimension L1, as indicated by the area 11N. In order to avoid this situation, in step S90, a distance assumed for the operation of the wide key 211 on the lower end where the image data 10 and the region 11M coincide, that is, on the upper end which is the opposite side of the end reaching the end. Is enlarged by twice (distance 2L) to define a new area 11K to be zoomed.

  Returning to FIG. 9, in step S <b> 100, as described with reference to FIG. 6B, the zoom processing unit 112 cuts out an enlarged region of the target image of the zoom image in the video memory 102. The process proceeds to step S120.

  In step S130, the receiving unit 131 is operated from the user terminal 200 to change the position in the image stored in the video memory 102 that is the target of the zoom image, as described with reference to FIG. If it is determined whether or not information is received, the process proceeds to step S140. If not, the process proceeds to step S150.

  In step S <b> 140, as described with reference to FIG. 4B, the image cutout processing unit 111 sets a region to be a zoom image in the image data stored in the video memory 102 in the user terminal 200. The image is cut out from the position changed according to the operation performed, and the process proceeds to step S120.

  In step S120, the resizing processing unit 113 resizes the image cut out in step S90, step S100, step S110, or step S140, and advances the process to step S150.

  In step S150, the network transmission unit 130 distributes the image resized in step S120 for display on the zoom screen 21A of the user terminal 200, and ends the image cutting process.

[8. Example of cutting position indication]
In the present embodiment described above, as described with reference to FIG. 4A, the user of the user terminal 200 operates the upper key 213, the lower key 214, the left key 215, or the right key 216. An instruction to change the position to be the target of the zoom image has been input to the camera device 100.

  Note that the position of the zoom image may be changed according to the result of image processing on the image stored in the video memory 102.

(1) Pattern Recognition FIG. 11 shows a control block diagram of an example of a modification of the camera device. In the modification, when pattern recognition is performed on the image data stored in the video memory 102 and, as a result, it is determined that the image of the predetermined pattern is included in the image, the region including the pattern is It is cut out as the target of the zoom image.

  That is, in this modification, the image cutout processing unit 111 cuts out an image of an area including the predetermined pattern as a zoom image target and sends the image to the resizing processing unit 113.

  Thus, for example, when a human face is set as a pattern, if the camera image includes a suspicious person's face image, a zoom image including the suspicious person's face is displayed on the zoom screen 21A of the user terminal 200. .

(2) Motion Vector FIG. 12 shows a control block diagram of another example of a modification of the camera device. In this modification, a motion vector is detected for image data stored in the video memory 102, and a region including a position where the motion vector is detected is cut out as a zoom image target.

  That is, in this modification, the image cutout processing unit 111 cuts out an image of an area including the position where the motion vector is detected as a zoom image target and sends the image to the resize processing unit 113.

  Thereby, for example, when the image sensor 101 captures an image of a suspicious person moving, a zoom image including the suspicious person is displayed on the zoom screen 21 </ b> A of the user terminal 200.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. In addition, the technical ideas described in the embodiments may be implemented singly or in combination as much as possible.

  10 image data, 20 display screen, 21A zoom screen, 22 thumbnail screen, 100 camera device, 101 image sensor, 102 video memory, 111 image cutout processing unit, 112 zoom processing unit, 113 resize processing unit, 114 whole image resize processing Part, 121, 122 codec, 130 network sending part, 131 receiving part, 140 write processing part, 141 recording medium, 200 user terminal, 210 operation part, 211 wide key, 212 telekey, 213 up key, 214 down key, 215 Left key, 216 Right key.

Claims (7)

A data transmission device that transmits an image to a terminal via a network,
Storage means for storing the first image;
First generation means for generating a second image obtained by reducing the first image stored in the storage means;
First transmission means for transmitting the second image to the terminal;
Setting means for setting a cutout position for cutting out the partial image from the first image;
Clipping means for cutting out a partial image from the first image;
Second generation means for generating a third image of a predetermined size based on the partial image;
Second transmission means for transmitting the third image to the terminal,
If the size of the partial image corresponding to the cut-out position set by the setting unit is smaller than the predetermined size, the second generation unit performs an enlargement process on the partial image and outputs the third image of the predetermined size Generate an image of
When the size of the partial image corresponding to the cutout position set by the setting unit is larger than the predetermined size, the partial image is subjected to reduction processing to generate the third image of the predetermined size. A data transmission device. The setting unit further includes a receiving unit that receives designation of a desired cutout position for the second image,
The data transmission device according to claim 1, wherein the cutout position is set so that the third image is included in the first image based on the received desired cutout position. When the size of the partial image corresponding to the cut-out position set by the setting unit is smaller than the predetermined size, the second generation unit determines that the centroid of the generated third image is the centroid of the partial image. If the size of the partial image corresponding to the cut-out position set by the setting means is larger than the predetermined size, the partial image is enlarged so as to be the same as The partial image is reduced so that the center of gravity is the same as the center of gravity of the partial image,
The data transmission apparatus according to claim 1, wherein the setting unit corrects the cutout position so that the third image is included in the first image.   The data transmitting apparatus according to claim 2, wherein the accepting unit accepts designation of the cutout position from the terminal. A specifying unit for specifying a region where a subject exists in the first image;
5. The data transmission device according to claim 1, wherein the setting unit receives a position including the subject specified by the specifying unit as designation of the cutout position. 6. A data transmission device that transmits an image to a terminal via a network,
Storage means for storing the first image;
First generation means for generating a second image obtained by reducing the first image stored in the storage means;
First transmission means for transmitting the second image to the terminal;
Setting means for setting a cutout position for cutting out the partial image from the first image;
Clipping means for cutting out the partial image from the first image;
Second generation means for generating a third image having a predetermined resolution based on the partial image;
Second transmitting means for transmitting the third image to the terminal;
The second generation means generates the third image by converting the resolution so that the resolution of the partial image corresponding to the cut-out position set by the setting means becomes the predetermined resolution. A data transmission device as a feature. It further comprises imaging means for imaging the subject,
The data transmission apparatus according to claim 1, wherein the first image is an image based on an image captured by the imaging unit.

Images