JP2005080043A - Digital camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital camera capable of sending only the quantity of data enough to be displayed by a wide screen monitor, when a user views the image data of a digital camera with an external wide screen monitor. <P>SOLUTION: The digital camera is provided with an interface for delivering/receiving data to/from an electronic device equipped with a display screen; a storage means for storing the image data; a discriminating means for discriminating the number of horizontal pixels and the number of vertical pixels of the display screen of the electronic device connected to the interface; and a processor for applying predetermined processing to the image data so that the image data becomes image data constituted by pixels whose number is the same as the number of horizontal pixels and the number of vertical pixels of the display screen of the electronic device discriminated by the discriminating means, and outputting the image data from the interface section to the electronic device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for displaying image data on a large-screen monitor connected to a digital camera via a network.

  Conventionally, image data shot or reproduced by a digital camera has been confirmed on a small LCD monitor provided in the digital camera. Furthermore, in order to confirm on a larger screen, an analog or digital video signal can be output from a digital camera and confirmed on a large screen of a normal home television. In recent years, various wireless LAN systems have been proposed. Among them, UWB (Ultra Wideband) and IEEE802.11g, which are one of the standards for short-range wireless communication systems, realize a data transfer rate of 100 Mbps. As a result, the waiting time associated with large-capacity data transfer is greatly reduced. It has become possible to construct a new home network that has never existed before by incorporating these functions into home devices and connecting each device with such a wireless LAN.

  In recent years, large screens for high-definition televisions have also become widespread, in which case the aspect ratio is different from the screen shot with a digital camera. In order to display the image data of the digital camera on such a screen, some processing such as conversion of the aspect ratio is required.

  Japanese Patent Application Laid-Open No. 6-6634 discloses a technique for changing the aspect ratio by changing the compression or expansion rate at the center and the periphery of the screen. Japanese Patent Application Laid-Open No. 2000-227785 discloses a technique for identifying a difference in aspect and simultaneously outputting a plurality of still images with different aspect ratios. Japanese Patent Laid-Open No. 2003-134334 discloses an image size conversion device that receives attribute information indicating image display capability from a line connection device such as a mobile phone, converts the image size, and transmits the image information in response to an image transmission request. .

  The output data for the large screen described above normally outputs the same content as the data displayed on the LCD monitor of the digital camera. At this time, if the aspect ratio of the screen differs between the LCD monitor of the digital camera and the external large screen monitor, the entire large screen may not be displayed at the same time. Although it is possible to check the entire image by compressing or scrolling the vertical and horizontal dimensions by operating the external monitor side, the operation is complicated. On the other hand, in recent years, the number of pixels of an image sensor used in a digital camera has become more than 5 million pixels. If all the image data is simply displayed and transferred to the target external monitor, the transfer time is long. It is uneconomical.

  An object of the present invention is to provide a digital camera capable of transmitting only a sufficient amount of image data to be displayed on a large screen monitor when viewing the image data of the digital camera on an external large screen monitor. And

In order to solve the above-described problems, the invention of claim 1 is directed to an electronic device having a display screen, an interface unit that exchanges data, a storage unit that stores image data, and the electronic device connected to the interface unit. A first discriminating unit that discriminates an aspect ratio that is a ratio of the horizontal and vertical lengths of the display screen of the device, and when the image data is output to the electronic device based on the aspect ratio discriminated by the first discriminating unit; Determining means for determining the number of horizontal pixels and the number of vertical pixels, and determining the number of pixels to be output from the digital camera by determining the aspect ratio of the display screen of the connected electronic device. I can do it.

  According to the second aspect of the present invention, there is provided an interface unit that exchanges data with an electronic device having a display screen, a storage unit that stores image data, and a horizontal and vertical display screen of the electronic device connected to the interface unit. A first discriminating unit that discriminates an aspect ratio that is a ratio of length; a second discriminating unit that discriminates vertical scanning line information of a display screen of the electronic device connected to the interface unit; and the second discriminating unit. And determining means for determining the number of horizontal pixels and the number of vertical pixels when outputting the image data to the electronic device from the determined vertical scanning line information and the aspect ratio determined by the first determining means. Therefore, it is possible to determine the number of pixels to be output by determining the horizontal pixels from the aspect ratio of the display screen of the connected display device and the number of vertical scanning lines. The invention according to claim 3 is characterized in that the vertical scanning line information is one of the total number of vertical scanning lines and the number of effective vertical scanning lines on the display screen of the electronic device. According to a fourth aspect of the present invention, when the aspect ratio determined by the first determining means is horizontal: vertical = M: N, the determining means sets the number of horizontal pixels to M of N of the vertical scanning line information. In the invention of claim 5, the aspect ratio is any one of M: N = 4: 3 or M: N = 16: 9. Yes.

  According to a sixth aspect of the present invention, the image data is predetermined so that the image data is composed of the same number of pixels as the number of horizontal pixels and the number of vertical pixels of the display screen of the electronic device determined by the determining means. And processing means for outputting to the electronic device from the interface unit, and only the image data corresponding to the number of pixels of the display screen, which is an external large screen, is output from the digital camera and displayed. Since unnecessary data is not transferred, the transfer efficiency is good.

  According to a seventh aspect of the present invention, there is provided an interface unit that exchanges data with an electronic device having a display screen, storage means that stores image data, the number of horizontal pixels of the display screen of the electronic device connected to the interface unit, and A discriminating unit for discriminating the number of vertical pixels, and the image data so as to be image data composed of the same number of pixels as the horizontal pixel number and the vertical pixel number of the display screen of the electronic device discriminated by the discriminating unit. And processing means for performing a predetermined process and outputting the processed data from the interface unit to the electronic device. That is, since the horizontal and vertical pixel numbers of an external display screen which is a large screen are detected and only image data necessary for display is output from the digital camera, transfer efficiency is good.

  According to an eighth aspect of the present invention, the processing means sets the display size in the horizontal direction of the image data output from the interface unit when the condition (1) or (2) below is satisfied. It is characterized in that processing is performed so as to be relatively enlarged as it approaches the vicinity of the left and right end points with respect to the horizontal center of the display screen of the device.

(N1 / N2) <(L1 / L2) (1)
(N1 / N2) <(M1 / M2) (2)
N1: Number of horizontal pixels of the image data
N2: number of vertical pixels of the image data
L1: Horizontal length of the display screen of the electronic device
L2: Vertical length of the display screen of the electronic device
M1: Number of horizontal pixels on the display screen of the electronic device
M2: The number of vertical pixels of the display screen of the electronic device, that is, if the external display screen is a horizontally long screen than the screen of the digital camera, the horizontal direction is enlarged to display the full angle of view. The distortion at the center is made as small as possible to minimize unsightlyness.

  According to a ninth aspect of the present invention, the processing means sets the display size in the vertical direction of the image data output from the interface unit if the electronic device satisfies any of the following conditions (1) and (2): 8. The digital camera according to claim 6, wherein processing is performed so as to reduce relative to the vicinity of the upper and lower end points with respect to the vertical center of the display screen of the device.

(N1 / N2) <(L1 / L2) (1)
(N1 / N2) <(M1 / M2) (2)
N1: Number of horizontal pixels of the image data
N2: number of vertical pixels of the image data
L1: Horizontal length of the display screen of the electronic device
L2: Vertical length of the display screen of the electronic device
M1: Number of horizontal pixels on the display screen of the electronic device
M2: The number of vertical pixels on the display screen of the electronic device In this case, unlike the invention of claim 8, the vertical direction is reduced and the full angle of view is displayed. At that time, the distortion in the central portion is similarly reduced.

  According to a tenth aspect of the present invention, the processing means sets the display size in the horizontal direction of the image data output from the interface unit when the electronic device satisfies any of the following conditions (1) and (2). 8. The digital camera according to claim 6, wherein processing is performed such that the image is reduced relative to the vicinity of the left and right end points with respect to the horizontal center of the display screen of the device.

(N1 / N2)> (L1 / L2) (1)
(N1 / N2)> (M1 / M2) (2)
N1: Number of horizontal pixels of the image data
N2: number of vertical pixels of the image data
L1: Horizontal length of the display screen of the electronic device
L2: Vertical length of the display screen of the electronic device
M1: Number of horizontal pixels on the display screen of the electronic device
M2: The number of vertical pixels of the display screen of the electronic device, that is, if the external display screen is a vertically long screen than the screen of the digital camera, the horizontal direction is reduced to display the full angle of view. The distortion at the center is made as small as possible to minimize unsightlyness.

  According to an eleventh aspect of the present invention, the processing means sets the display size in the vertical direction of the image data output from the interface unit to the electronic device if any of the following conditions (1) and (2) is satisfied. 8. The digital camera according to claim 6, wherein processing is performed so that the image is relatively enlarged as it approaches the vicinity of the upper and lower end points with respect to a vertical central portion of the display screen of the device.

(N1 / N2)> (L1 / L2) (1)
(N1 / N2)> (M1 / M2) (2)
N1: Number of horizontal pixels of the image data
N2: number of vertical pixels of the image data
L1: Horizontal length of the display screen of the electronic device
L2: Vertical length of the display screen of the electronic device
M1: Number of horizontal pixels on the display screen of the electronic device
M2: Number of vertical pixels on the display screen of the electronic device. In this case, unlike the invention of claim 10, the vertical direction is enlarged to display the entire screen. At that time, the distortion in the central portion is similarly reduced.

  The invention of claim 12 is characterized in that the processing means processes the image data so that the image data is displayed in the same size in both the horizontal and vertical directions on the display screen of the electronic device. As a result, the entire display screen is displayed at the same magnification, and image data to be output is determined according to the pixels of the external display screen. According to a thirteenth aspect of the present invention, the processing means displays at least the upper and lower ends in the vertical direction of the image data substantially coincide with the upper and lower ends in the vertical direction of the display screen of the electronic device, or the image data. The horizontal left end and the right end of the electronic device are displayed so as to substantially coincide with the horizontal left end and the right end of the display screen of the electronic device. That is, the image data of the digital camera is displayed in the full screen in either the vertical or horizontal direction of the external display screen.

  The invention of claim 14 is characterized in that the processing means performs processing so that all of the image data from the left and right ends in the horizontal direction to the upper and lower ends in the vertical direction are displayed on the display screen of the electronic device. The image data of the digital camera is displayed on the external display screen without being cut off. The invention of claim 15 further comprises an extracting means for extracting a range to be displayed on the display screen of the electronic device from the image data, and the extracting means has a vertical direction of the image data on the display screen of the electronic device. When the upper and lower ends are displayed substantially coincident with each other, the electronic device is obtained from the image data with respect to the horizontal direction or when the left and right ends in the horizontal direction are substantially coincidentally displayed with respect to the vertical direction. A range corresponding to the display screen is extracted. In this case, the entire screen of the digital camera is displayed in the horizontal or vertical direction of the external display screen, and the other is overscanned.

  The invention of claim 16 further comprises an extracting means for extracting a range to be displayed on the display screen of the electronic device from the image data, and a zoom means for instructing to zoom the display screen, wherein the extracting means includes the zoom A range to be displayed on the display screen of the electronic device is extracted from the image data based on a zooming instruction by the means. That is, the image data of only the zoomed range is output by determining the number of pixels of the external monitor. The invention of claim 17 further includes extraction means for extracting a range to be displayed on the display screen of the electronic device from the image data, and scrolling the display image displayed on the display screen of the electronic device vertically or horizontally. Scroll signal generating means for generating a scroll signal for the electronic device, wherein the extracting means extracts a range to be displayed on the display screen of the electronic device from the image data based on the scroll signal generated by the scroll signal generating means. Yes. In this case as well, the image data of only the zoomed range is output by determining the number of pixels of the external monitor.

  The invention according to claim 18 further includes a second display screen for displaying the image data, a detection unit for detecting that the electronic device is connected to the interface unit, and a detection result of the detection unit. And a power control means for turning off the power of the second display screen. That is, when displaying on an external large screen, the power saving effect can be obtained by turning off the monitor of the digital camera. The invention according to claim 19 is characterized in that the interface unit exchanges data with the electronic device via a network, and not only directly connects the devices via a cable but also exchanges data via a network such as a LAN. I do.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram illustrating the main functions of the digital camera 1 of the present invention.

  The image capturing unit 101 that captures a subject includes a photographing lens, a diaphragm, a shutter, an image sensor, a driver that drives the image sensor, and the like. Here, the image pickup device is a photoelectric conversion image pickup device that outputs an electric signal corresponding to the light intensity of the subject image formed on the image pickup surface, and a CCD type or MOS type solid state image pickup device is used. An imaging signal from the imaging unit is converted into a digital signal by the A / D converter 102 and temporarily stored in the buffer memory 103. The buffer memory can store a plurality of frames of image data captured by the imaging unit 101 at the same time. The imaging signal is subjected to processing such as contour enhancement, gamma correction, color correction, and compression / expansion processing during recording / reproduction in accordance with instructions from the CPU 104. The signal after this processing is also temporarily stored in the buffer memory 103 described above. If necessary, the image data compressed by the processing circuit 105 is recorded on a memory card 106 that is detachably attached to the digital camera. Image data captured by the imaging unit 101 and converted into a digital signal is displayed on a liquid crystal (LCD) monitor 107. The LCD monitor 107 is also used to reproduce and display image data recorded on the memory card 106. Image data similar to the signal sent to the LCD monitor 107 is sent to an external display device through the interface unit 108. As a connection method at this time, there are a connection method using a cable such as USB or IEEE1394, or a wireless connection method such as a wireless LAN or Bluetooth. In the present embodiment, it is assumed that the digital camera and various electrical appliances such as a TV monitor placed in each room in the home are connected to each other via a home network via a wireless LAN. Among these electrical appliances, devices that are turned on can detect IDs (identification information) of devices that are turned on, and can transmit and receive data in accordance with preset operation procedures. If a plurality of devices are detected at this time, a device that transmits and receives data is selected according to a predetermined priority order. The operation member 109 includes a shutter button or the like for instructing start of photographing, and details will be described later with reference to FIG. The CPU 104 controls the entire sequence at the time of shooting and playback of the digital camera 1.

  An example of the display form in each device when the digital camera 1 and the external large display device 2 according to the present invention are connected will be described with reference to FIG. In the figure, the same members as those in FIG. An external large display device (external monitor) 2 is a home TV monitor or TV receiver having a large display screen 201. In addition to receiving ordinary TV broadcast programs, this TV receiver directly receives data from the digital camera 1 by the reception antenna 202 using a wireless LAN protocol. Or the management server which manages the whole home network may be installed separately, and the form which transmits / receives various data between apparatuses via this server may be sufficient.

  The external part of the digital camera 1 will be described. The aforementioned operation member 109 is composed of at least buttons 1091 to 1095. Reference numeral 1091 denotes a shutter button for instructing start of photographing. Reference numeral 1092 denotes a select dial for switching between recording and reproduction modes. A multi-selector 1093 is used to move the cursor up / down / left / right with respect to various menu items displayed on the LCD monitor 107 by pressing a menu display button 1094, and to set and determine menu displayed items and functions. It is. The multi-selector 1093 is also used for raising and lowering the zoom lens at the time of shooting, and is also used for updating a reproduced image, selecting a screen in the multi-display screen, and zooming up and down the reproduced screen during reproduction. Reference numeral 1095 denotes a multi-display switching button for switching whether to reproduce a multi-screen or only one screen on the LCD monitor. Reference numeral 1061 denotes an insertion slot for the memory card 106. Reference numeral 1081 denotes an antenna that transmits various data to an external monitor using a wireless LAN protocol. As an embodiment of the present invention, in FIG. 2, the screen data displayed on the LCD monitor 107 is sent to the TV monitor 2, and both sides of the large screen 201 with different aspect ratios are displayed in a blank state.

Next, the operation of the present invention will be described using the flowcharts of FIGS. FIG. 3 is a schematic operation flow of the entire digital camera 1 according to the present invention connected to the external monitor 2. In step S101, it is confirmed whether the power of the digital camera 1 is on. If the power is on, the process proceeds to step S102 to confirm whether the digital camera 1 is connected to the external monitor 2 by recognizing the identification information described above. . The connection form here may be either the wired or wireless method described above. If not, the process proceeds to step S103 to check whether the power is turned off. If the power is turned off, the process is terminated. If not, the process returns to step S102 to check whether an external monitor is connected. In the middle of the loop of step S102 and step S103 when the external monitor 2 is not connected, the digital camera alone performs shooting or playback operations, but these are not necessary for the description of the present invention and are omitted here. ing.

  If it is confirmed in step S102 that the external monitor 2 is connected, the process proceeds to step S104, and the number of display pixels and aspect ratio of the display unit 201 of the external monitor 2 from the external monitor 2 connected here is determined. Reads information about the external monitor 2. If all the image data of the digital camera created from the large-pixel image sensor is output to the external monitor 2, it takes a long time to transfer, so that in step S105 it is sufficient to display on the external monitor 2 based on the read external monitor information. Create as much data. The external monitor information is obtained in different information forms depending on the type of the connected external monitor 2. Details of step S105 will be described with reference to FIG. In step S106, it is confirmed whether or not the power source of the digital camera 1 is turned off. If not, the process returns to step S105 to generate output image data having an optimum data amount. If it is confirmed that the power is turned off, this flow is terminated.

  The creation of output data in step S105 in FIG. 3 will be described with reference to FIG. In step S110, it is determined whether it is possible to determine the number of horizontal and vertical display images of the external monitor 2 read in step S104 described above. As described above, the external monitor information can be obtained in various forms according to the external monitor, but can be handled by considering the following three types. The first is a case where only an aspect ratio can be discriminated by a general home TV receiver made of a cathode ray tube or the like. In this case, since there is no pixel number information, the number of pixels to be output is set in advance only from the determined aspect ratio. For example, if it is determined that the monitor has an aspect ratio of 4: 3, the number of vertical pixels is set to 480 and the number of horizontal pixels is set to 640, and the process proceeds to step S112. Second, when the display unit 201 of the external monitor 2 performs liquid crystal display or plasma display, the number of pixels to be output can be set by confirming the number of horizontal and vertical pixels, and the process proceeds to step S112. If the external monitor 2 is a multi-scan monitor, the resolution set at that time is determined, and the process proceeds to step S112. On the other hand, the third form of acquisition is a case where a general home TV receiver composed of a cathode ray tube or the like described first can discriminate the number of vertical scanning lines in addition to the aspect ratio. At this time, since the horizontal direction simply scans the beam in the horizontal direction, specific horizontal pixel number information cannot be obtained. In that case, the process proceeds to step S111, where the number of effective horizontal pixels is calculated based on the vertical scanning line information read in step S104 and the aspect ratio. Specifically, if the external monitor 2 is a normal screen with an aspect ratio of 4: 3, the horizontal pixel number is set to 4/3 of the number of vertical scanning lines, and the aspect ratio is 16: 9. If it is a screen, the number of horizontal pixels is 16/9 times the number of vertical scanning lines. The number of vertical scanning lines may be calculated by changing the number of effective vertical scanning lines.

In the following description, the aspect ratio refers to either the ratio between the horizontal length and the vertical length of the screen or the ratio between the number of horizontal pixels and the number of vertical pixels. However, the pixel arrangement is a square pixel arrangement in which the pixel interval is the same in both horizontal and vertical directions. In step S112, it is determined whether the aspect ratio of the external monitor 2 is the same as the aspect ratio of the image captured by the imaging unit 101 of the digital camera 1 or the playback image reproduced from the memory card 106. When both aspects are the same, the image data of the digital camera is displayed on the full-screen external monitor 2 without being lost. If they are not the same, the process proceeds to step S113, and if they are the same, the process proceeds to step S114. In step S114, the number of pixels of the external monitor 2 determined so far is compared with the captured image data or reproduced image data of the digital camera 1 described above. If the number of pixels of the external monitor 2 is larger than these image data, the process proceeds to step S115, and if smaller, the process proceeds to step S116. In step S116, since the number of pixels of the external monitor 2 is larger than the image data of the digital camera 1, if the image data is simply output as it is, a small screen of the digital camera 1 is displayed on the display screen of the external monitor 2. . To avoid this, the image data of the digital camera 1 is complemented and output after matching the number of pixels of the external monitor 2 in order to display the entire screen of the external monitor 2. In step S116, contrary to step S116, since the number of pixels of the external monitor 2 is small, the reduced image is created by thinning out the image data of the digital camera 1 to match the number of pixels of the external monitor 2. In step S117, the enlarged or reduced image data is output to the external monitor 2.

  In step S118, it is determined whether or not a zoom instruction for enlarging or reducing the captured image or the reproduced image displayed on the LCD monitor 107 or the external monitor 2 by operating the digital camera 1 is given. As an example of the zoom instruction method, when the menu display button 1094 is pressed while an image is captured or reproduced, a selection item for zooming up or down on the LCD monitor 107 is superimposed on the screen (not shown). Here, when a desired item is selected by the multi-selector 1093, a zoom-up or zoom-down instruction is issued. If the zoom instruction is made in this way, the process proceeds to step S119, and if not, the process proceeds to step S120. In step S119, a cropping range corresponding to the zoom instruction is determined from the photographed or reproduced image data, and the process returns to step S114 to recreate the screen for the LCD monitor 107 or the external monitor 2. In step S119, it is determined whether or not a scroll instruction for moving the display screen up and down or left and right is given when the entire screen is not displayed at the same time by zooming up. In this case, the scroll instruction method also displays a selection screen for scrolling in the same manner as the zoom instruction method described above. If a scroll instruction is issued, the process proceeds to step S119 as in the case of the zoom instruction, and a cutout range corresponding to the scroll instruction is determined. If there is no instruction, this flow ends.

If the aspect ratio of the captured or reproduced image data differs from that of the external monitor 2 in step S112, the CPU 104 displays a selection menu on the LCD monitor 107 in order to make the user select whether to change the aspect of the output screen. (Not shown). Also in this case, the user selects a desired item using the multi-selector 1093 as in the previous zoom instruction and scroll instruction. If it is determined in step S113 that the user has selected to change the aspect ratio, the process proceeds to step S121, and when the aspect conversion process ends, the process proceeds to step S114. This aspect conversion process will be described later. When the aspect conversion is not performed, there are two display methods: a method in which the screen is reduced and the entire screen is displayed, and a method in which all image data is displayed in the horizontal or vertical direction and the other is protruded from the display screen. The latter method is called overscan setting here. If it is determined that the aspect is set not to be converted, the process proceeds to step S122, where it is determined whether overscan is set. The setting in this case is also selected by the user using the menu display button 1094 and the multi-selector 1093 described above. Of course, it may be set to any one by default. If the overscan setting is not set, the process proceeds to step S114 in order to display the entire screen based on the image data by blanking both sides or the top and bottom of the screen. FIG. 5 shows a display example when an image having an aspect ratio of 4: 3 is displayed on an external monitor of 16: 9. If the aspect ratio is reversed, the top and bottom of the display screen will be blank. If it is set to overscan in step S122, the process proceeds to step S123, where a predetermined cutout range is determined. FIG. 6 shows a display example when an image having an aspect ratio of 4: 3 is displayed on the external monitor 2 having an aspect ratio of 16: 9. In the figure, the image data within the solid line is actually displayed. After this, the process proceeds to step S114. Note that the portion not displayed in FIG. 6 can be moved up and down as indicated by a double arrow by a scroll instruction in step S120. However, step S122 and step S123 are cases where the number of pixels of the external monitor 2 is smaller than the image data of the digital camera 1. If the number of pixels of the external monitor 2 is large, step S122 and step S123 are skipped.

  Here, the aspect conversion processing in step S121 will be described with reference to FIGS. FIG. 7A shows a screen with an aspect ratio of 4: 3, and FIG. 7B shows a screen with an aspect ratio of 16: 9. In the case of FIG. 7B, the vertical direction is a case where the horizontal direction is simply expanded in the horizontal direction so that all the angles of view of the original screen are displayed uniformly. As can be seen from this figure, if the aspect conversion is simply performed, the circle becomes an ellipse and the screen becomes distorted and unsightly. Therefore, it is necessary to reduce the degree of unsightly by reducing the extent of extension near the center in the horizontal direction as compared with the vicinity of the end point. A method for extending the display size of the display screen by extending the pixel interval near the end point compared to the vicinity of the center will be described with reference to FIG. Here, only the left half of one horizontal scanning line is shown. The right half is symmetrical. First, the horizontal scanning lines of the screen with aspect ratios of 4: 3 and 16: 9 are L1 and L2, respectively, and the lengths are H1 and H2, respectively. First, the pixels on the 4: 3 scanning line (L1) are sampled at unequal intervals (a <b <c <d <e) as shown in the figure. These are arranged on the 16: 9 scanning line (L2) at equal intervals. That is, k1, k2, k3, k4, and k5 are determined so that k1 · a = k2 · b = k3 · c = k4 · d = k5 · e. When the pixel interval is set in this way, the display size is enlarged as going to the periphery. Contrary to what has been described here, the image data of the digital camera 1 can be sampled at equal intervals first and then arranged at unequal intervals so as to become denser in the vicinity of the end point than at the center. Further, unlike FIG. 7B, the same result can be obtained even if the vertical direction is reduced so that the entire horizontal screen is displayed uniformly. In this case, the degree of reduction may be reduced near the center in the vertical direction as compared with the vicinity of the end point. When displaying 16: 9 image data on a 4: 3 screen, the enlargement or reduction described above may be reversed.

The description so far has mainly described the case of aspect conversion between the standard size and high definition size display screens. As for the aspect of the display screen, there are other standards with different aspect ratios such as scope size and vista size. Furthermore, the aspect of the image sensor used in the digital camera is not only 4: 3 but also 3: 2. There is not one way. Therefore, in general, the case of FIG. 7 can be referred to as processing for converting a screen having a small aspect ratio into a screen having a large aspect ratio. This will be specifically described below with reference to FIG. First, the number of horizontal pixels of the image data of the digital camera 1 is N1, the number of vertical pixels is N2, the horizontal length of the display screen of the external monitor 2 is L1, the vertical length is L2, and the horizontal pixels of the display screen of the external monitor 2 The number is M1, and the number of vertical pixels is M2. Between these,
N1 / N2 <L1 / L2
Or N1 / N2 <M1 / M2
As shown in FIG. 7, the aspect conversion process may be performed to enlarge the pixel size near the horizontal end point. Alternatively, the pixel size in the vicinity of the end point in the vertical direction may be reduced.

vice versa,
N1 / N2> L1 / L2
Or N1 / N2> M1 / M2
When there is a relationship, the aspect conversion process may be performed so as to reduce the pixel size near the horizontal end point. Alternatively, the pixel size near the end point in the vertical direction may be enlarged.

As described above, since control is performed so that only the data corresponding to the number of pixels of the display screen is output according to the aspect of the display screen of the external monitor 2 connected to the digital camera 1, the transfer time of the image data is shortened. In addition, since it is not necessary to perform processing such as thinning for display on the external monitor 2, it can be easily connected to various external monitors.

It is a block diagram which shows the structure of the digital camera by this invention. It is a figure explaining an example of the display form of the digital camera and external monitor by this invention. 6 is a flowchart illustrating a display operation of the digital camera according to the present invention. 6 is a flowchart illustrating a display operation of the digital camera according to the present invention. This is a display example of images with different aspect ratios. It is another example of a display of an image from which an aspect ratio differs. It is a display example when the aspect ratio is simply converted. It is a figure explaining the case where the ratio of compression or expansion | extension is changed by center vicinity and a peripheral part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Digital camera 101 Image pick-up part 102 A / D converter 103 Buffer memory 104 CPU
105 Processing Circuit 106 Memory Card 107 LCD Monitor 108 Interface 109 Operation Member 2 External Monitor 201 Large Screen 202 Receiving Antenna 1061 Card Insertion Port 1081 Transmitting Antenna 1091 Shutter Button 1092 Select Dial 1093 Multi Selector 1094 Menu Display Button 1095 Multi Display Switching Button

Claims (19)

An interface unit for exchanging data with an electronic device having a display screen;
Storage means for storing image data;
First discrimination means for discriminating an aspect ratio which is a ratio of a horizontal and a vertical length of a display screen of the electronic device connected to the interface unit;
A digital camera comprising: determination means for determining the number of horizontal pixels and the number of vertical pixels when outputting the image data to the electronic device based on the aspect ratio determined by the first determination means.
(Judge the number of pixels to output by distinguishing the aspect) An interface unit for exchanging data with an electronic device having a display screen;
Storage means for storing image data;
First discrimination means for discriminating an aspect ratio which is a ratio of a horizontal and a vertical length of a display screen of the electronic device connected to the interface unit;
Second determining means for determining vertical scanning line information of a display screen of the electronic device connected to the interface unit;
Determining means for determining the number of horizontal pixels and the number of vertical pixels when outputting the image data to the electronic device from the vertical scanning line information determined by the second determining means and the aspect ratio determined by the first determining means; A digital camera characterized by comprising 3. The digital camera according to claim 2, wherein the vertical scanning line information is any one of the total number of vertical scanning lines and the number of effective vertical scanning lines on the display screen of the electronic device. When the aspect ratio determined by the first determining unit is horizontal: vertical = M: N, the determining unit determines that the number of horizontal pixels is M times N times the vertical scanning line information. The digital camera according to claim 2, characterized in that: 5. The digital camera according to claim 4, wherein the aspect ratio is any one of M: N = 4: 3 and M: N = 16: 9. Further, the image data is subjected to predetermined processing so that the image data is composed of the same number of pixels as the number of horizontal pixels and the number of vertical pixels of the display screen of the electronic device determined by the determining means. 3. The digital camera according to claim 1, further comprising processing means for outputting from the interface unit to the electronic device. An interface unit for exchanging data with an electronic device having a display screen;
Storage means for storing image data;
Determining means for determining the number of horizontal pixels and the number of vertical pixels of a display screen of the electronic device connected to the interface unit;
The interface unit that performs predetermined processing on the image data so that the image data is composed of the same number of pixels as the number of horizontal pixels and the number of vertical pixels of the display screen of the electronic device determined by the determining unit And a processing means for outputting to the electronic device. If any of the following conditions (1) and (2) is satisfied, the processing means sets the horizontal display size of the image data output from the interface unit to the horizontal direction of the display screen of the electronic device. 8. The digital camera according to claim 6, wherein processing is performed so as to enlarge relative to the central portion as it approaches the vicinity of the left and right end points.
(N1 / N2) <(L1 / L2) (1)
(N1 / N2) <(M1 / M2) (2)
N1: Number of horizontal pixels of the image data
N2: number of vertical pixels of the image data
L1: Horizontal length of the display screen of the electronic device
L2: Vertical length of the display screen of the electronic device
M1: Number of horizontal pixels on the display screen of the electronic device
M2: Number of vertical pixels on the display screen of the electronic device If any of the following conditions (1) and (2) is satisfied, the processing means sets the vertical display size of the image data output from the interface unit to the vertical direction of the display screen of the electronic device. 8. The digital camera according to claim 6, wherein processing is performed so as to reduce relative to the central portion as it approaches the vicinity of the upper and lower end points.
(N1 / N2) <(L1 / L2) (1)
(N1 / N2) <(M1 / M2) (2)
N1: Number of horizontal pixels of the image data
N2: number of vertical pixels of the image data
L1: Horizontal length of the display screen of the electronic device
L2: Vertical length of the display screen of the electronic device
M1: Number of horizontal pixels on the display screen of the electronic device
M2: Number of vertical pixels on the display screen of the electronic device If any of the following conditions (1) and (2) is satisfied, the processing means sets the horizontal display size of the image data output from the interface unit to the horizontal direction of the display screen of the electronic device. 8. The digital camera according to claim 6, wherein processing is performed so as to reduce relative to the center portion as it approaches the vicinity of the left and right end points.
(N1 / N2)> (L1 / L2) (1)
(N1 / N2)> (M1 / M2) (2)
N1: Number of horizontal pixels of the image data
N2: number of vertical pixels of the image data
L1: Horizontal length of the display screen of the electronic device
L2: Vertical length of the display screen of the electronic device
M1: Number of horizontal pixels on the display screen of the electronic device
M2: Number of vertical pixels on the display screen of the electronic device If any of the following conditions (1) and (2) is satisfied, the processing means sets the vertical display size of the image data output from the interface unit to the vertical direction of the display screen of the electronic device. 8. The digital camera according to claim 6, wherein processing is performed so as to enlarge relative to the central portion as it approaches the vicinity of the upper and lower end points.
(N1 / N2)> (L1 / L2) (1)
(N1 / N2)> (M1 / M2) (2)
N1: Number of horizontal pixels of the image data
N2: number of vertical pixels of the image data
L1: Horizontal length of the display screen of the electronic device
L2: Vertical length of the display screen of the electronic device
M1: Number of horizontal pixels on the display screen of the electronic device
M2: Number of vertical pixels on the display screen of the electronic device 8. The process according to claim 6, wherein the processing means processes the image data so that the image data is displayed in the same size in both the horizontal and vertical directions on the display screen of the electronic device. The digital camera described in Crab. The processing means displays at least the upper and lower ends in the vertical direction of the image data substantially coincide with the upper and lower ends in the vertical direction of the display screen of the electronic device, or the left and right ends in the horizontal direction of the image data. 13. The digital camera according to claim 12, wherein the digital camera is displayed so as to be substantially coincident with a left end and a right end in a horizontal direction of a display screen of the electronic device. 13. The digital camera according to claim 12, wherein the processing means performs processing so that all of the image data from the left and right ends in the horizontal direction to the upper and lower ends in the vertical direction are displayed on the display screen of the electronic device. Furthermore, an extraction means for extracting a range to be displayed on the display screen of the electronic device from the image data,
When the vertical and vertical ends of the image data are displayed on the display screen of the electronic device so as to be substantially coincident, the extracting means is substantially coincident with the horizontal direction or the horizontal left and right ends. The digital camera according to claim 12, wherein when being displayed, a range corresponding to a display screen of the electronic device is extracted from the image data in a vertical direction. And extracting means for extracting a range to be displayed on the display screen of the electronic device from the image data;
Zoom means for instructing to zoom the display screen,
8. The digital camera according to claim 6, wherein the extraction unit extracts a range to be displayed on the display screen of the electronic device from the image data based on a zooming instruction from the zoom unit. . And extracting means for extracting a range to be displayed on the display screen of the electronic device from the image data;
Scroll signal generating means for generating a scroll signal for scrolling the display image displayed on the display screen of the electronic device up and down or left and right;
8. The extraction unit according to claim 6, wherein the extraction unit extracts a range to be displayed on the display screen of the electronic device from the image data based on a scroll signal from the scroll signal generation unit. Digital camera. A second display screen for displaying the image data;
Detecting means for detecting that the electronic device is connected to the interface unit;
8. The digital camera according to claim 6, further comprising power control means for turning off the power of the second display screen according to a detection result of the detection means. 8. The digital camera according to claim 6, wherein the interface unit exchanges data with the electronic device via a network.

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