JP5098209B2 - Image reproduction apparatus and image reproduction system - Google Patents

Description

The present invention relates to an image reproduction apparatus and an image reproduction system that transmit and receive images and reproduce them.

Conventionally, a slide show that displays a plurality of images in order is known, and images taken with a camera can be displayed and viewed in order while panning or zooming. There is also an image display device that reproduces music in accordance with image display.
On the other hand, mobile phones with cameras have become widespread and it has become possible to transmit captured images. For example, Patent Document 1 describes an image communication device that includes an image input device and an image display device having a wireless communication function, and transmits and displays an image from the image input device to the image display device by wireless communication. ing.
JP 2002-094848 A

However, in the case of a camera with a large number of pixels, when a plurality of images are transmitted continuously, there is a problem that a large-capacity buffer memory is required on the receiving side, resulting in an increase in apparatus cost.
In view of the above problems, an object of the present invention is to provide an image reproduction device and an image reproduction system capable of transmitting a plurality of images without increasing the capacity of a memory.

An image reproduction apparatus according to the present invention includes a communication unit that receives an image from a camera having a function of transmitting a reduced image and a buffer memory that temporarily holds at least two images received by the communication unit The communication unit receives the images and sequentially displays them as a slide show, and uses the at least two images stored in the buffer memory to gradually overwrite the previously displayed image with the next image. have a display control unit for displaying on the display control unit may calculate the time to transmit the image based on information from the camera side, the transmission time for slideshow display of images stored in the buffer memory It is set so that it may become longer than time.
Further, the display control unit, the transmission time, and displaying the image to be shorter than the interval for displaying the images in a slide show.
An image reproduction system according to the present invention includes an imaging device that captures a subject image, a first storage unit that stores a first image captured by the imaging device, and the first storage unit that is stored in the first storage unit. A camera having an image processing unit that creates a second image obtained by reducing one image, and a first communication unit that transmits the second image; and a second unit that receives the second image from the camera. A communication memory, a buffer memory that temporarily holds at least two images received by the second communication unit, images received by the second communication unit and sequentially displayed as a slide show, and the buffer memory An image reproduction device having a display control unit that displays the next image gradually overwriting the previously displayed image using at least two images held in Is the communication part the camera? In addition to receiving an image, the free storage capacity of the buffer memory is transmitted to the camera, and the image processing unit performs the first processing by the image processing unit based on the free storage capacity of the buffer memory received from the image playback device. 1 image is reduced, and the display control unit calculates the time for transmitting the image from the camera, and sets the time for displaying the slide show of the image stored in the buffer memory to be longer than the transmission time. It is characterized by doing.

Further, the image processing unit creates a plurality of the second images having different resolutions in advance, and the first communication unit is based on the free storage capacity of the buffer memory received from the image reproduction device. The selected second image is transmitted.
Further, the first storage unit stores the second image reduced by the image processing unit, and the first communication unit transmits the first image when the already transmitted image is transmitted again. The second image stored in the storage unit is transmitted.
In particular, the image processing unit is configured so that a transmission / reception time of an image between the first communication unit and the second communication unit is shorter than an interval at which the display control unit displays an image in a slide show. The first image is reduced.
Further, the display control unit includes a transmitting and receiving time of the image between said first communication unit and the second communication unit, the second image to be shorter than the interval for displaying images as a slideshow It is characterized by displaying.
In particular, the second communication unit transmits information on the number of pixels of the image displayed by the display control unit to the first communication unit, and the image processing unit transmits the first image to the display control unit. The second image reduced to be equal to or smaller than the number of pixels of the image to be displayed is created.
Further, the camera includes a first selection unit that selects an image reduction rate or the number of pixels, and the image processing unit selects the first image by the first selection unit. It is characterized by being reduced to
Alternatively, the image reproduction device includes a second selection unit that selects a reduction ratio or the number of pixels of an image displayed by the display control unit, and the second communication unit is selected by the second selection unit. Information on the reduction ratio or the number of pixels is transmitted to the first communication unit, and the image processing unit is configured to select the second image with the reduction ratio or the number of pixels selected by the second selection unit. It is characterized by creating.

  In particular, the second communication unit transmits the free storage capacity of the buffer memory to the first communication unit, and the first communication unit does not transmit an image having a capacity larger than the free storage capacity. It is characterized by.

  According to the present invention, the capacity of the buffer memory on the receiving side can be reduced.

Hereinafter, an image reproducing apparatus according to the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows a block diagram of an image reproduction apparatus 101 according to the first embodiment. The image reproduction device 101 includes an image transmission unit 102 and an image reception unit 103. The image transmission unit 102 includes a lens 106 and an image sensor 107, and is a mobile phone or a digital camera having a wireless communication function. In accordance with apparatus information such as the resolution of the image output from the image receiving unit 103 and the capacity of the buffer memory, the image transmitting unit 102 reduces the transmission image accordingly, and the image receiving unit The image reduced to 103 is transmitted. Also, music data matched to the image to be transmitted is transmitted from the image transmitting unit 102 to the image receiving unit 103, and the image receiving unit 103 reproduces music or outputs audio data while outputting the received image.

  First, the configuration of the image transmission unit 102 will be described. The image transmission unit 102 operates according to a program stored in advance in a CPU (arithmetic processing unit) 104. The CPU 104 controls the entire image transmission unit 102 by its own I / O (input / output unit) and the system bus 105. The image transmission unit 102 has a camera function, and light incident from the lens 106 is imaged on the image sensor 107, converted into a digital signal by the A / D conversion unit 108, and stored in the buffer memory 109. . The buffer memory 109 temporarily stores a series of captured images.

The image stored in the buffer memory 109 can be read out by the CPU 104 via the system bus 105 and stored in the memory card 111 via the memory card IF (interface) 110. Alternatively, image processing such as color correction or reduction is performed by a DSP (digital signal processing unit) 112 in accordance with an instruction from the CPU 104 and stored in the memory card 111.
Further, the CPU 104 reads out an image stored in the buffer memory 109 or the memory card 111, sends it to the display control unit 113, and displays it on the liquid crystal monitor 114.

The operation panel 115 is used for setting the image transmitting unit 102 (for example, turning on / off the power, setting shooting conditions, selecting a folder for a transmission image, selecting a display device type on the image receiving unit 103 side, and a reduction rate) Setting). The subject is imaged by the image sensor 107 by depressing the release 116.
Audio is input from the microphone 117, converted to digital data by the audio input unit 118, and stored together with image data in the buffer memory 109 and the memory card 111 by the CPU 104. In addition, an audio file or a captured image file can be input by the memory card 111. Further, the CPU 104 uses the transmission / reception unit 119 and the antenna 120 to communicate with the image reception unit 103 and image data, audio data, control data (image file name and size, music file name and size, camera pan direction, end notification, etc. ) Etc. by wireless communication.

  Next, the configuration of the image receiving unit 103 will be described. The image receiving unit 103 operates according to a program stored in advance in a CPU (arithmetic processing unit) 121. The CPU 121 controls the entire image receiving unit 103 connected via the I / O (input / output unit) of the CPU 121 itself and the system bus 122. The image receiving unit 103 is turned on and off, and the image receiving unit 103 is set by an operation panel 123 or an infrared remote controller (not shown) connected to the infrared transmission / reception unit 133. The CPU 121 wirelessly communicates with the image transmission unit 102 via the transmission / reception unit 125 and the antenna 124 to receive and control image data and audio data (output image type, number of pixels, buffer memory 126 capacity, end Request). The CPU 121 stores the image data and audio data sent from the image transmission unit 102 in the memory card 128 via the buffer memory 126 and the memory card IF 127.

The image data stored in the buffer memory 126 is converted into an image output signal suitable for the display device 130 by the image output unit 129 and displayed on the display device 130. In the present embodiment, the display device 130 is built in the image receiving unit 103, but a terminal for outputting an image signal of the image output unit 129 may be provided and provided externally.
On the other hand, the audio data stored in the memory card 128 is read by the CPU 121, converted into an analog audio signal by the audio output unit 131, and output to the speaker (SP) 132. The audio signal may be an audio signal such as music. Alternatively, the image output unit 129 may multiplex the audio signal with the image signal and output the multiplexed signal to an externally connected television.

Further, the image receiving unit 103 has a built-in printing device 134 and can print the received image as it is or print an image stored in the buffer memory 126 or the memory card 128. The printing device 134 may be externally attached.
The image receiving unit 103 also includes a network IF 135, and can use not only wireless connection by the transmission / reception unit 125 but also image data and audio data received via the network. In this case, the CPU 121 can use the image data and audio data received via the network IF 135 instead of the image data and audio data received by the transmission / reception unit 125.

  Next, the operation of the image playback device 101 will be described. The display device 130 is assumed to have an image format of either SDTV (standard television) or HDTV (high definition television). The number of SDTV pixels is 720 × 480 pixels, and the number of HDTV pixels is 1920 × 1080 pixels. The image sensor 107 has 3840 × 2160 pixels.

  Furthermore, the image playback apparatus 101 conforms to the EXIF standard (image file standard for digital cameras standardized by JEIDA), and the captured image of the buffer memory 109 is an image reduced by the DSP 112 (for example, 640 × 480 pixels or 160 × 120 pixels) and the like are stored in the memory card 111. Additional information such as shooting date and time is also stored.

For example, various formats such as MP3, AAC, and WAV are used for music data, and reproduction processing is performed according to the format to be transmitted.
When the power of both the image transmission unit 102 and the image reception unit 103 is turned on, the device information (number of output pixels, buffer memory capacity, etc.) on the image reception unit 103 side is automatically transferred to the image transmission unit 102 side. The image corresponding to the device information on the image receiving unit 103 side is transmitted from the image transmitting unit 102 side. In the default state, the image to be transmitted is a series of images stored in the buffer memory 109 of the image transmission unit 102 main body. When the folder of the memory card 111 is designated on the operation panel 115 instead of the default state, a series of images stored in the designated folder is transmitted.

Hereinafter, the program processing of the CPU 104 of the image transmission unit 102 and the CPU 121 of the image reception unit 103 will be described in detail with reference to the flowcharts of FIGS. In the flowcharts shown in FIGS. 2 and 3, the image transmission unit 102 reduces the image according to the number of pixels of the image output from the image reception unit 103 and the storage capacity, and then transmits the image to the reception side. The image receiving unit 103 shows a process of performing a slide show using received images. The slide show may not be performed.
(Image transmission unit: S201) The operation panel 115 is operated to turn on the power of the image transmission unit 102.
(Image receiving unit: S251) The operation panel 123 is operated to turn on the power of the image receiving unit 103.
(Image receiving unit: S252) Information relating to the type of display device 130 of the image receiving unit 103, the number of pixels (resolution) of the image output from the image output unit 129, the capacity of the buffer memory 126, and the like is sent to the image transmitting unit 102. Note that the type of the display device 130 and the number of pixels of the output image are automatically recognized by the CPU 121 by reading the device information.
(Image transmission unit: S202) The information transmitted in S252 is received.
(Image transmission unit: S203) A captured image stored in the buffer memory 109 (or a captured image stored in the memory card 111) according to the number of pixels of the image output from the image output unit 129 of the image reception unit 103 Calculate the reduction ratio.

For example, when the number of pixels of the photographed image is 3872 × 2592 pixels and the number of pixels of the output image is 720 × 480 pixels of SDTV, the reduction ratio is about 1/5 in both the vertical and horizontal directions. In addition, when the number of pixels of the output image is 1920 × 1080 pixels of HDTV, the reduction ratio is about ½ both vertically and horizontally.
At this time, the reduction ratio may be adjusted so that at least two images are stored in the buffer memory 126 of the image receiving unit 103. For example, even if two images are not transmitted to the buffer memory 126 of the image receiving unit 103 even when the image is reduced to the number of pixels of the output image and transmitted, according to the capacity of the buffer memory 126 of the image receiving unit 103, Further, a reduced image may be transmitted.
(Image transmission unit: S204) The image transmission unit 102 transmits the information file of the slide show with music to the image reception unit 103. This information file includes information such as a music file name, an image file name, and an image display pan direction specified by default or by the user.
(Image receiving unit: S253) Upon receiving the information file of the slide show with music, the image receiving unit 103 prepares to receive music data and image data sent later according to these information files.
(Image transmission unit: S205) The music data having the previously transmitted music file name is transmitted to the image reception unit 103 in a predetermined format.
(Image receiving unit: S254) The image receiving unit 103 that has received the music data stores the music data in the memory card 128 via the buffer memory 126 or the memory card IF 127, and an audio output unit in accordance with the output of an image sent later. Preparation for playing music and the like from 131 and the speaker 132 is performed.
(Image transmission unit: S206) The image output counter M of the image transmission unit 102 is set to an initial value of 1 to prepare for image transmission.
(Image receiving unit: S255) The image output counter N of the image receiving unit 103 is set to an initial value of 1 to prepare for receiving an image.
(Image transmitting unit: S207) The processing branches depending on the number of pixels of the output image of the image receiving unit 103 received in S202, and proceeds to S208 for SDTV and proceeds to S209 for HDTV.
(Image transmission unit: S208) (In the case of SDTV) An image stored in the memory card 111 at the time of shooting is selected as a reduced image (thumbnail) of EXIF, and prepared as a transmission image. At this time, similarly to the next S209 and S210, instead of using the reduced image (thumbnail) of the EXIF, an image reduced by 1/5 in the vertical and horizontal directions by the DSP 112 may be used.
(Image transmission unit: S209) (in the case of HDTV) The captured image in the buffer memory 109 is reduced to 1/2 in both vertical and horizontal directions by the DSP 112.
(Image transmission unit: S210) (in the case of HDTV) The reduced image is stored in the memory card 111 and prepared as a transmission image.
(Image transmission unit: S211) The prepared transmission image is transmitted to the image reception unit 103.
(Image receiving unit: S256) The image transmitted from the image transmitting unit 102 is received. That is, when the number of pixels in the image output unit 129 of the image receiving unit 103 is SDTV, an EXIF reduced image is received, and in the case of HDTV, an image obtained by reducing the captured image by 1/2 in both vertical and horizontal directions is received.
(Image receiving unit: S257) When the image reception is completed, the next image request is sent to the image transmitting unit 102.

Here, FIG. 3 shows a continuation of the flowchart of FIG. Note that A, B, C, D, and E in FIG. 2 are connected to the same reference numerals in FIG. 3, and the processing directions are indicated by arrows.
(Image transmission unit: S212) The image transmission unit 102 that has transmitted the image in S211 determines whether or not a user's end operation has been performed through the operation panel 115. If there is an end operation, the process proceeds to S213, and if there is no end operation, the process proceeds to S216.
(Image transmission unit: S213) When the user performs an end operation, “end” is transmitted, the image reception unit 103 is notified that the series of operations are to be ended, and the process proceeds to S214.
(Image sending unit: S214) Wait until the end confirmation is received from the image receiving unit 103. When the end confirmation is received, the process proceeds to S215, and all the operations of the image sending unit 102 are finished.
(Image transmission unit: S216) It is determined whether or not there is a next image request in S257. If there is a next image request, the process proceeds to S217. If not, the process proceeds to S213.
(Image transmission unit: S217) It is determined whether or not it is the final image of the image previously specified by the image file name. If the image transmitted in S211 is the final image, the process proceeds to S219, and if it is not the final image, the process proceeds to S218.
(Image transmission unit: S218) The image output counter M is incremented by 1, and the process returns to S207.
(Image transmission unit: S219) From here, the second image transmission process starts. The image output counter is set to an initial value of 1. At this time, the memory card 111 stores all the first images transmitted in the processing flow from S207 to S217.
(Image transmission unit: S220) The first transmission image stored in the memory card 111 is read out and transmitted to the image reception unit 103. That is, when the first transmission image is SDTV, an EXIF reduced image is transmitted, and when the first transmission image is HDTV, an image obtained by reducing the captured image by 1/2 in both the vertical and horizontal directions is transmitted.
(Image transmission unit: S221) It is determined whether or not the user has performed an end operation using the operation panel 115. If there is an end operation, the process proceeds to S213, and if there is no end operation, the process proceeds to S222.
(Image transmission unit: S222) It is determined whether or not there is a next image request in S257. If there is a next image request, the process proceeds to S223, and if not, the process proceeds to S213.
(Image transmission unit: S223) It is determined whether or not it is the final image of the image previously specified by the image file name. If the image transmitted in S220 is the final image, the process returns to S219, and the transmission is repeated from the first image. If it is not the final image, the process proceeds to S224.
(Image transmission unit: S224) The image output counter M is incremented by 1, and the process returns to S220 to transmit the next image.

Next, the processing of the image receiving unit 103 after receiving the first image in S256 and requesting the next image in S257 will be described.
(Image receiving unit: S258) It is checked whether or not the number of output pixels of the image output unit 129 is larger than the number of pixels of the received image. If it is larger, the received image is stored in the buffer memory 126 without being enlarged. For example, in the first image transmission process, in the case of SDTV, an EXIF reduced image (640 × 480 pixels) is transmitted, so that it can be output as an SDTV image as it is. When the number of pixels is 160 × 120 pixels, in order to display this as an SDTV image on the entire screen, when the image is enlarged by about 4 times in the vertical and horizontal directions, the displayed image becomes rough. Therefore, in this case, as shown in FIG. 4, the reduced image 909 is displayed on a part of the screen 908 of the display device 130 connected to the image output unit 129. Note that the display location of the reduced image 909 may be anywhere on the screen 908 of the display device 130.
(Image receiving unit: S259) It is determined whether or not the file capacity of the received image is larger than the remaining capacity of the storage capacity of the buffer memory 126. If larger, the process proceeds to S266, and if smaller, the process proceeds to S260. Thereby, overflow of the buffer memory 126 can be prevented. For example, when at least two received images can be stored in the buffer memory 126, the remaining capacity is 50% of the capacity of the buffer memory 126 when the buffer memory 126 is empty. In this case, as shown in FIG. 5A, the (N−1) th image file capacity 402 and the Nth image file capacity 403 are stored in the buffer memory 126.
(Image receiving unit: S260) The received image is stored in the buffer memory 126.
(Image receiving unit: S261) It is determined whether or not the image output counter N is larger than 1. That is, it is determined whether or not the image is the first image. If the first image with N = 1, the process proceeds to S262, and if it is the second image or later, the process proceeds to S263.
(Image receiving unit: S262) The first image is output from the image output unit 129 for a preset time, and the process proceeds to S266. The display time of the image is set in advance using the operation panel 123 of the image receiving unit 103 or an infrared remote controller connected to the infrared transmitting / receiving unit 133, or set in advance using the operation panel 115 of the image transmitting unit 102. In this case, it may be included in the information file sent in S204 and sent to the image receiving unit 103.
(Image receiving unit: S263) For the second and subsequent images, the (N-1) -th received image and the N-th received image are transition- displayed. For example, FIG. 5B shows a state in which the (N−1) th received image 404 and the Nth received image 405 are transitionally displayed on the display device 130. The Nth received image 405 is gradually overwritten from the right side on the (N−1) th received image 404 previously displayed on the display device 130 by the image output unit 129, and finally N The received image 405 is replaced with the first one.
(Image receiving unit: S264) After the transition display, the Nth image is output from the image output unit 129 for a preset time in the same manner as in S262.
(Image receiving unit: S265) The (N−1) th image is erased from the buffer memory 126. Note that the (N + 1) th next image is stored in the erased portion. In this manner, since at least two images are always stored in the buffer memory 126, a transition display as shown in FIG. 5B is possible.
(Image receiving unit: S266) It is checked whether or not the “end” notification transmitted in S213 of the image transmitting unit 102 has been received. If received, the process proceeds to S267, and if not received, the process proceeds to S269.
(Image reception unit: S267) In response to the “end” notification received from the image transmission unit 102, “end” is returned to confirm the end, and all operations of the image reception unit 103 are ended in S268.
(Image receiving unit: S269) It is determined whether or not it is the final image of the image previously specified by the image file name. If the image received in S256 is the final image, the process returns to S255, and a series of processing from S255 to S269 is repeated. If it is not the final image, the process proceeds to S270.
(Image receiving unit: S270) The image output counter N is incremented by 1, and the process returns to the image receiving process of S256 to receive the next image.

  In this embodiment, the type of the display device 130 and the number of pixels of the image to be output are automatically selected by reading the information of the device to which the CPU 121 is connected. You may make it select 130 types and the pixel count of the image to output. Alternatively, the processing of S252 and S202 may be omitted, and the type of the display device 130 and the number of pixels of the image to be output may be selected on the operation panel 115 of the image transmission unit 102. However, in this case, there is a possibility that the number of pixels of the output image of the image receiving unit 103 may be larger, and may be excluded when the size of the received image is large in the process of S259.

  In the branching process of S207, the reduction process is performed in the case of HDTV. However, as in the case of SDTV, images of several resolutions are stored in the memory card 111 in advance and output to the image. You may make it select the image of the near pixel number from the memory card 111. FIG. For example, as shown in FIG. 6, a plurality of the same images are stored in the memory card 111 for each resolution. That is, for the first image, three types of the first image file (large) 902, the first image file (medium) 903, and the first image file (small) 904 are stored. Also for the first image, three types of an Nth image file (large) 905, an Nth image file (medium) 906, and an Nth image file (small) 907 are stored.

  If the number of pixels of the (large) image is 3840 × 2160 pixels, the number of pixels of the (medium) image is 1920 × 1080 pixels, and the number of pixels of the (small) image is 640 × 480 pixels, In the processing, when the type of the display device 130 of the image receiving unit 103 is SDTV, the first image file (small) 904 and the Nth image file (small) 907 are read from the memory card 111. Similarly, in the case of HDTV, the first image file (large) 902 and the Nth image file (large) 905 are read from the memory card 111. As a result, the reduction process at the time of transmission can be omitted.

  In the processing of S262 and S264, the image is output from the image output unit 129 for a preset time. However, the CPU 121 determines the speed at which the transmission / reception unit 125 communicates with the transmission / reception unit 119 of the image transmission unit 102. Since it can be grasped, the transmission time of the image can be calculated if the volume of the image data transmitted from the image transmission unit 102 is sent in advance. Therefore, the CPU 121 can output a continuous image smoothly by setting the time for outputting an image from the image output unit 129 to be longer than the calculated transmission time in the processing of S262 and S264.

Conversely, the CPU 104 of the image transmission unit 102 may calculate the image transmission time and notify the image reception unit 103 of the image output time corresponding to the transmission time.
As described above, the image reproduction device 101 according to the present embodiment notifies the image transmission unit 102 of the number of pixels of the output image of the image output unit 129 displayed on the display device 130 of the image reception unit 103 in advance, thereby transmitting the image. The unit 102 can reduce the number of pixels of the image to be transmitted to the minimum necessary. As a result, the file size of the image to be transmitted is reduced, and the transmission time of the image transmitted from the transmission / reception unit 119 of the image transmission unit 102 to the transmission / reception unit 125 of the image reception unit 103 is a case where a captured image having a large number of pixels is transmitted as it is. Compared to, it can be shortened.

In addition, since at least two images can be stored in the buffer memory 126 of the image receiving unit 103, two images to be displayed before and after can be displayed in transition . At that time, the overflow of the buffer memory 126 can be prevented by not storing an image having a size larger than the remaining capacity of the buffer memory 126. As a result, the large-capacity buffer memory 126 becomes unnecessary, and the cost of the apparatus can be reduced.

Furthermore, when an image having a smaller number of pixels than the number of output pixels of the image output unit 129 is output, the image is output without being enlarged, so that it is possible to prevent the display image from becoming rough.
Further, in the processing of the image transmission unit 102, the image subjected to the reduction processing at the time of the first image transmission is stored in the memory card 111, so that it is not necessary to perform the reduction processing again when transmitting the second time or later. .

(Second Embodiment)
An image reproduction device 151 according to the second embodiment illustrated in FIG. 7 includes an image transmission unit 152 and an image reception unit 153. In the image transmission unit 152 and the image reception unit 153, the same reference numerals as those of the image transmission unit 102 and the image reception unit 103 in the first embodiment denote the same components. The difference from the first embodiment is that the image transmission unit 152 does not have a DSP 112 that performs image reduction processing, and the image reception unit 153 includes a DSP 501 that performs image reduction processing.

  Furthermore, a television broadcast receiving unit 502 is provided, and the image receiving unit 153 is used as a television so that the television broadcast received by the television broadcast receiving unit 502 can be displayed on the display device 130. In particular, similarly to the network IF 135 described in the first embodiment, the television broadcast receiving unit 502 can use not only wireless connection by the transmission / reception unit 125 but also received television broadcast image data and audio data. In this case, the CPU 121 uses the image data and audio data received from the television broadcast instead of the image data and audio data received by the transmission / reception unit 125. That is, the image output unit 129 outputs image data received from the image transmission unit 152 or image data and audio data of television broadcasting from the image output unit 129.

  As in the first embodiment, when both the image transmission unit 152 and the image reception unit 153 are powered on, the device information on the image reception unit 153 side is automatically transmitted to the image transmission unit 152 side. Then, an image corresponding to the device information on the image receiving unit 153 side is transmitted from the image transmitting unit 152 side. In the default state, the image to be transmitted is a series of images stored in the buffer memory 109 of the image transmission unit 102 main body. When the folder of the memory card 111 is designated on the operation panel 115 instead of the default state, a series of images stored in the designated folder is transmitted.

Hereinafter, the program processing of the CPU 104 of the image transmission unit 152 and the CPU 121 of the image reception unit 153 will be described in detail with reference to the flowchart of FIG. The display device 130 is assumed to be compatible with the HDTV image format.
First, similarly to S201 and S251 of the first embodiment, in S301 and S351, the image transmission unit 152 and the image reception unit 153 are powered on.
(Image receiving unit: S352) Information regarding the capacity of the buffer memory 126 of the image receiving unit 153 is sent to the image transmitting unit 152. Note that, unlike the first embodiment, the number of pixels of the output image may not be sent.
(Image transmitting unit: S302) Information regarding the capacity of the buffer memory 126 of the image receiving unit 153 is received.

The next steps S303, S304, S353, and S354 are processed in the same manner as S204, S205, S253, and S254 of the first embodiment, and exchange information files, music data, etc. of the slideshow with music. In S305 and S355, the image output counter M of the image transmission unit 152 and the image output counter N of the image reception unit 153 are set to an initial value 1, respectively, and preparations for transmitting and receiving images are made.
(Image transmission unit: S306) It is determined whether or not the file capacity of the image to be transmitted is larger than the storage capacity of the buffer memory 126 of the image reception unit 153 received in S302. In the case, the process proceeds to S307. Thereby, overflow of the buffer memory 126 and useless transmission can be prevented.
(Image transmitting unit: S307) The image in the buffer memory 109 is transmitted as it is to the image receiving unit 153 without being reduced.
(Image receiving unit: S356) The image transmitted from the image transmitting unit 152 is received.
(Image receiving unit: S357) When the image reception is completed, the next image request is sent to the image transmitting unit 152.

  The processing from S308 to S314 of the image transmission unit 152 is the same as the processing from S221 to S224 of the first embodiment. That is, when there is an end operation of the user through the operation panel 115 and when there is no request for the next image, all the operations of the image transmission unit 152 are ended. If the transmitted image is the final image, the process returns to S305, and transmission is repeated from the first image again. If the transmitted image is not the final image, the image output counter M is incremented by one, and the process returns to S306 to transmit the next image.

On the other hand, after receiving the image, the image receiving unit 153 performs the following process.
(Image receiving unit: S358) It is determined whether or not the file capacity of the received image is larger than the remaining capacity of the storage capacity of the buffer memory 126. If larger, the process proceeds to S366, and if smaller, the process proceeds to S359. As a result, an image having a capacity larger than that of the buffer memory 126 is not stored, so that overflow of the buffer memory 126 can be prevented. As described with reference to FIG. 5 of the first embodiment, the buffer memory 126 needs to store at least two output images output from the image output unit 129 for transition display. In other words, the difference from the first embodiment is that at least one image before reduction sent from the image transmission unit 152 and an image after reduction must be stored in the buffer memory 126 at least. At least two. Accordingly, the remaining capacity here is the remaining capacity obtained by subtracting the capacity of at least two images after reduction from the capacity of the buffer memory 126. In the first embodiment, since a reduced image is sent, it is not necessary to store the image before reduction, and it is only necessary to store at least two images after reduction.
(Image receiving unit: S359) The received image is stored in the buffer memory 126.
(Image receiving unit: S360) The image received by the DSP 501 is reduced. In the present embodiment, since the display device 130 is compatible with HDTV, the 3840 × 2160 pixels of the photographed image is reduced to ½ in both the vertical and horizontal directions so as to be close to 1920 × 1080 pixels of the HDTV image.
(Image receiving unit: S361) The reduced image is stored in the buffer memory 126.

The next processing from S362 to S365 is the same as S261 to S265 of the first embodiment. That is, the image stored in the buffer memory 126 is displayed for a preset time, but for the second and subsequent images, the (N−1) th received image and the Nth received image are displayed as transitions. Then, the (N−1) th image is erased from the buffer memory 126.
The next processing from S366 to S370 is the same as S266 to S270 of the first embodiment. In other words, when “end” notification is received from the image transmission unit 152, “end” is returned to the image transmission unit 152, and all operations of the image reception unit 153 are ended. If the received image is the final image, the process returns to S355, and reception is repeated from the first image again. If the received image is not the final image, the image output counter N is incremented by one, and the process returns to S356 to receive the next image.

As described above, the image reproducing device 151 according to the present embodiment can output an image corresponding to the number of pixels of the image output by the image output unit 129 by reducing the image with the image receiving unit 153. In addition, by notifying the image transmission unit 152 of the capacity of the buffer memory 126 of the image reception unit 153, overflow of the buffer memory 126 and useless transmission can be prevented. Similarly, since the image receiving unit 153 does not store a received image having a capacity larger than the remaining capacity of the buffer memory 126, at least two output images can be stored in the buffer memory 126, and a smooth transition display can be performed. .

  In the present embodiment, the display device 130 is compatible with the HDTV image format. However, even if a determination process corresponding to S207 of the first embodiment is performed between S359 and S360, the display device 130 is compatible with the HDTV image format. I do not care. When performing the discrimination processing, for example, in S360, the processing may be performed so that the size is reduced to 1/5 in the vertical and horizontal directions in the case of SDTV, and is reduced to 1/2 in the vertical and horizontal directions in the case of HDTV.

  In S363 and S365, the image is output from the image output unit 129 for a preset time. However, as in the first embodiment, the CPU 121 can calculate the transmission time of the image in advance. it can. Therefore, in the processing of S363 and S365 in which the previous image must be output until the next image is received, the CPU 121 sets the time for outputting the image from the image output unit 129 to be longer than the calculated transmission time. It is possible to output a continuous image smoothly.

(Third embodiment)
The configuration of the image playback device according to the third embodiment is the same as that of the image playback device 151 of the second embodiment shown in FIG. The difference from the second embodiment is that all the images reduced by the DSP 501 of the image receiving unit 153 are stored in the memory card 128 connected via the memory card IF 127. Note that, as in the first embodiment, the image sensor 107 has 3840 × 2160 pixels, and the display device 130 corresponds to the SDTV image format.

The operation of the image playback device 151 according to the third embodiment is shown in the flowcharts of FIGS. Since the operation of the image transmission unit 152 is the same as that of S301 to S314 of the second embodiment, the description thereof will be omitted and the operation of the image reception unit 153 will be described. Further, the processing from S451 to S455 of the image receiving unit 153 is the same as the processing from S351 to S355 of the second embodiment.
(Image receiving unit: S456) The image transmitted from the image transmitting unit 152 is received and stored in the buffer memory 126. At this time, the remaining amount control process of the buffer memory 126 may be performed as in the process of S358 of the second embodiment.
(Image receiving unit: S457) When the image reception is completed, the next image request is sent to the image transmitting unit 152.
(Image receiving unit: S458) The image received by the DSP 501 is reduced. In the present embodiment, since the display device 130 is compatible with SDTV, the 3840 × 2160 pixels of the photographed image is reduced to 1/5 both vertically and horizontally so as to be close to 720 × 480 pixels of the SDTV image.
(Image receiving unit: S459) The reduced image is stored in the memory card 128.

The next processing from S460 to S463 is the same as S261 to S265 of the first embodiment. That is, the image stored in the buffer memory 126 is displayed for a preset time, but for the second and subsequent images, the (N−1) th received image and the Nth received image are displayed as transitions. Then, the (N−1) th image is erased from the buffer memory 126.
Here, the continuation of the flowchart in FIG. 9 is shown in FIG. 10, and G, H, I, J, and K in FIG. 9 are connected to the same reference numerals in FIG. 10, respectively, and the direction of processing is indicated by arrows.

  The next processing from S464 to S468 is the same as S266 to S270 of the first embodiment except for the branch destination. In other words, when “end” notification is received from the image transmission unit 152, “end” is returned to the image transmission unit 152, and all operations of the image reception unit 153 are ended. If the received image is not the final image, the image output counter N is incremented by one and the flow returns to S456 to receive the next image. The branch destination when the received image is the final image is different from that of the first embodiment, and the process proceeds to S469.

After the next process, the image receiving unit 153 does not receive the image, reads the image of the memory card 128 storing the image reduced for the first time, and enters the process of outputting from the image output unit 129 to the display device 130.
(Image receiving unit: S469) The image output counter N of the image receiving unit 153 is set to an initial value of 1.
(Image receiving unit: S470) The first reduced image stored in the memory card 128 is read out.

The next processing from S471 to S474 outputs and displays an image in the same manner as the processing from S460 to S463.
The next processing from S475 to S477 is the same as S464 to S468 of the first embodiment except for the branch destination. That is, when the “end” notification is received from the image transmission unit 152, all the operations of the image reception unit 153 are ended. If the image read from the memory card 128 is not the final image, the image output counter N is incremented by one and the process returns to S470 to read the next image from the memory card 128. If the image read from the memory card 128 is the final image, the process returns to S469, and the image is repeatedly read from the first image of the memory card 128 again.

  As described above, the image reproducing device 151 according to the present embodiment performs image reduction by the image receiving unit 153 and stores all the reduced images in the memory card 128, as in the second embodiment. In addition, it is not necessary to transmit the same image from the image transmission unit 152 many times. Therefore, in the second and subsequent displays, there is no need to consider the transmission time of the image from the image transmission unit 152 to the image reception unit 153, and the image is interrupted even if the output interval of the image output by the image output unit 129 is shortened. Therefore, an image can be smoothly displayed on the display device 130.

Similarly to the second embodiment, image data received from the network IF 135 or the television broadcast receiving unit 502 is also subjected to a reduction process or the like in the same manner as the image data received from the image transmitting unit 152, so that the image output unit 129 can be displayed on the display device 130.
Although the display device 130 corresponds to the SDTV image format, a determination process corresponding to S207 of the first embodiment may be performed between S457 and S458. In the case of performing the discrimination processing, for example, in S458, the processing may be performed so that the size is reduced to 1/5 in the vertical and horizontal directions in the case of SDTV, and is reduced to 1/2 in the vertical and horizontal directions in the case of HDTV.

  In S461 and S463, the image is output from the image output unit 129 for a preset time. However, as in the first and second embodiments, the CPU 121 transmits the image in advance. Since the time can be calculated, a continuous image can be smoothly output by setting the time for outputting the image from the image output unit 129 to be longer than the image transmission time.

(Fourth embodiment)
The configuration of the image reproduction apparatus according to the fourth embodiment is the same as that of the image reproduction apparatus 101 according to the first embodiment shown in FIG. In the present embodiment, the image reduced by the image transmission unit 102 is printed by the printing device 134 of the image reception unit 103.
The operation of the image playback apparatus 101 according to the present embodiment will be described with reference to the flowchart of FIG. In addition, the step of the same code | symbol as the flowchart of FIG. 2 and FIG. 3 of 1st Embodiment represents the same process.

In S201 and S251, the image transmitting unit 102 and the image receiving unit 103 are powered on.
(Image receiving unit: S252b) Information related to the number of pixels (resolution) of the printing device 134 of the image receiving unit 103 is sent to the image transmitting unit 102.
(Image transmission unit: S202b) Information regarding the number of pixels of the printing device 134 of the image output unit 129 of the image reception unit 103 is received.

The processing from S203 to S216 is the same as in the first embodiment, and the image is reduced and transmitted so as to match the number of pixels of the printing device 134 of the image output unit 129 of the image receiving unit 103.
(Image transmission unit: S217b) It is determined whether or not it is the final image of the image previously specified by the image file name. If the image transmitted in S211 is not the final image, the process proceeds to S218. However, if the image is the final image, unlike the first embodiment, the process proceeds to S213, and all the processes of the image transmission unit 102 are terminated.
(Image receiving unit: S260b) The received image is temporarily stored in the buffer memory 126 and output to the printing apparatus 134.

Since processing other than the above is the same as that of the first embodiment, description thereof is omitted.
As described above, the image reproduction device 101 according to the present embodiment notifies the image transmission unit 102 of the number of print pixels of the printing device 134 of the image reception unit 103, so that the image transmission unit 102 determines the number of pixels of the image to be transmitted. It can be reduced to the minimum necessary. As a result, the file size of the image to be transmitted is reduced, and the transmission time of the image transmitted from the transmission / reception unit 119 of the image transmission unit 102 to the transmission / reception unit 125 of the image reception unit 103 is a case where a captured image having a large number of pixels is transmitted as it is. Compared to, it can be shortened.

  In the present embodiment, the case where printing is performed only once has been described. However, as in the first embodiment, in the processing of the image transmission unit 102, the reduced image at the first image transmission is stored in the memory card 111. By storing it, it is not necessary to perform the reduction process again when printing a plurality of times. Further, as in the second and third embodiments, the image receiving units 103 and 153 perform the reduction process, and output the image to the printing device 134 instead of outputting the image to the display device 130. You may make it.

(Fifth embodiment)
FIG. 12 shows a block diagram of an image reproduction apparatus according to the fifth embodiment. The same reference numerals as those in the first and second embodiments denote the same components. The image reproducing device 601 according to the present embodiment corresponds to the image receiving units 103 and 153 of the above-described embodiments, and does not include the transmission / reception unit 125. The image playback device 601 inputs image data and audio data from the outside with the memory card 128, performs a reduction process with the DSP 501 in accordance with the number of pixels of the display device 130 or the printing device 134, and sends it to the display device 130 or the printing device 134. Output an image.

  The processing of the CPU 121 of this embodiment corresponds only to the processing of the image reception unit 103 in the flowcharts of FIGS. 2 and 3 of the first embodiment. That is, each transmission process of S252 and S257 is replaced with reading of file information from the memory card 128. In addition, each reception process of S253, S254, and S256 is replaced with reading of file data from the memory card 128. Further, the transmission / reception processing in S266 and S267 is replaced with control of the memory card 128.

As described above, the image reproduction device 601 according to the present embodiment reduces the image input from the memory card 128 according to the number of pixels of the image output by the image output unit 129 and stores at least two images in the buffer memory 126. Therefore, smooth transition display can be performed.
(Sixth embodiment)
The image reproduction device 601 according to the sixth embodiment transmits / receives an image via a network instead of the transmission / reception units 119 and 125 in the first to fourth embodiments in the fifth embodiment of FIG. . In this case, an image transmission unit having a network IF corresponding to the image transmission unit 102 or 152 and the image reproduction device 601 are connected via the network IF 135 to transmit / receive image data, audio data, and control data. The processing in this case is basically the same in the flowcharts of the embodiments, except that the image communication means is switched from wireless communication to network communication.

In this way, by using a network instead of wireless communication, the image output unit 129 can reduce and transmit according to the number of pixels of the image output from the image output unit 129 or the number of pixels of the printing device 134, so that the image quality is not impaired. , Network utilization efficiency can be improved.
As described above, the image reproduction apparatus according to the present invention has been described in each embodiment. However, the display apparatus 130 is not related to a television image such as an SDTV or an HDTV, and monitors of personal computers with various resolutions such as VGA, SVGA, and XGA. If it is, the same effect is obtained. For example, when the display device 130 has a resolution of VGA (640 × 480 pixels), a captured image of 3840 × 2160 pixels is reduced to about 1/5 in both vertical and horizontal directions, and transmitted without reducing the quality of the display image. , Transmission time can be greatly reduced.

1 is a block diagram of an image reproduction device according to a first embodiment. 3 is a flowchart of the image reproduction device according to the first embodiment. 3 is a flowchart of the image reproduction device according to the first embodiment. It is explanatory drawing explaining a display example. It is explanatory drawing explaining the state of the buffer memory of the image reproduction apparatus which concerns on 1st Embodiment, and an image display state. It is explanatory drawing explaining the example of an image file. It is a block diagram of the image reproduction apparatus which concerns on 2nd Embodiment. It is a flowchart of the image reproduction apparatus which concerns on 2nd Embodiment. It is a flowchart of the image reproduction apparatus which concerns on 3rd Embodiment. It is a flowchart of the image reproduction apparatus which concerns on 3rd Embodiment. It is a flowchart of the image reproduction apparatus which concerns on 4th Embodiment. It is a block diagram of the image reproduction apparatus which concerns on 5th Embodiment.

Explanation of symbols

101, 151 ... Image reproduction device 102, 152 ... Image transmission unit 103, 153 ... Image reception unit 104, 121 ... CPU
107: Image sensor 109 ... Buffer memory 111, 128 ... Memory card 112, 501 ... DSP
115, 123 ... operation panel 126 ... buffer memory 129 ... image output unit 119, 125 ... transmission / reception unit 130 ... display device 134 ... printing device 135 ... network IF 502 ...・ TV broadcast receiver

Claims (11)

A communication unit that receives an image from a camera having a function of reducing and transmitting a captured image;
A buffer memory that temporarily holds at least two images received by the communication unit;
The communication unit receives images and sequentially displays them as a slide show, and uses at least two images held in the buffer memory to display the next image so that the next image is gradually overwritten. possess a display control unit,
The display control unit calculates a time for transmitting an image based on information from the camera side, and sets a time for displaying a slide show of images stored in the buffer memory to be longer than the transmission time. A featured image reproduction apparatus. The image reproduction apparatus according to claim 1,
Wherein the display control unit, the transmission time, an image reproducing apparatus and displaying the image to be shorter than the interval for displaying the images in a slide show. An image sensor for capturing a subject image;
A first storage unit that stores a first image captured by the image sensor;
An image processing unit for creating a second image obtained by reducing the first image stored in the first storage unit;
A camera having a first communication unit for transmitting the second image;
A second communication unit for receiving the second image from the camera;
A buffer memory that temporarily holds at least two images received by the second communication unit;
The second communication unit receives the images and sequentially displays them as a slide show, and gradually overwrites the previously displayed image with the next image using at least two images held in the buffer memory. An image reproduction device having a display control unit for displaying
The second communication unit receives an image from the camera and transmits the free storage capacity of the buffer memory to the camera.
The image processing unit reduces the first image based on a free storage capacity of the buffer memory received from the image reproduction device ;
The display control unit calculates a time for transmitting an image from the camera, and sets a time for displaying a slide show of images stored in the buffer memory so as to be longer than the transmission time. Playback system. In the image reproduction system according to claim 3 ,
The image processing unit creates a plurality of the second images having different resolutions in advance,
The first communication unit transmits the second image selected based on a free storage capacity of the buffer memory received from the image reproduction device. The image reproduction system according to claim 3 or 4 ,
The first storage unit stores the second image reduced by the image processing unit,
The first communication unit transmits the second image stored in the first storage unit when transmitting an already transmitted image again. In the image reproduction system according to any one of claims 3 to 5 ,
The image processing unit is configured such that an image transmission / reception time between the first communication unit and the second communication unit is shorter than an interval at which the display control unit displays images in a slide show. An image reproduction system characterized by reducing the size of the image. In the image reproduction system according to any one of claims 3 to 5 ,
Wherein the display control unit includes a transmitting and receiving time of the image between said first communication unit and the second communication unit, displaying the second image to be shorter than the interval for displaying images as a slideshow An image reproduction system characterized by this. In the image reproduction system according to any one of claims 3 to 7 ,
The second communication unit transmits information on the number of pixels of the image displayed by the display control unit to the first communication unit,
The image processing system is characterized in that the image processing unit creates the second image in which the first image is reduced to be equal to or smaller than the number of pixels of the image displayed by the display control unit. In the image reproduction system according to any one of claims 3 to 7 ,
The camera includes a first selection unit that selects a reduction ratio or the number of pixels of an image,
The image processing unit reduces the first image to a reduction rate or the number of pixels selected by the first selection unit. In the image reproduction system according to any one of claims 3 to 7 ,
The image reproduction device includes a second selection unit that selects a reduction ratio or the number of pixels of an image displayed by the display control unit,
The second communication unit transmits information on the reduction ratio or the number of pixels selected by the second selection unit to the first communication unit,
The image processing unit creates the second image with a reduction ratio or the number of pixels selected from the first image by the second selection unit. In the image reproduction system according to any one of claims 3 to 10 ,
The second communication unit transmits the free storage capacity of the buffer memory to the first communication unit;
The image reproduction system according to claim 1, wherein the first communication unit does not transmit an image having a capacity larger than the free storage capacity.

Images