JP2011039334A - Digital photograph frame - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital photograph frame in which favorable visibility can be secured even if an angle for seeing a display plane is different. <P>SOLUTION: The digital photograph frame includes a display part 4 on which the visibility of a display image is varied according to a difference of an angle at which a display panel is seen, a detecting part 10 detecting a position of a people seeing the image displayed on the display part 4, and an image processing part performing image processing for changing the visibility of the image for the image on the basis of the detection result of the detecting part 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a digital photo frame.

  A digital photo frame that functions as a photo frame by displaying a photograph taken with a digital camera on a display is known (for example, see Patent Document 1).

JP 2003-169734 A

  By the way, with a conventional digital photo frame, it is placed in a room or the like as a photo stand, and the angle at which the viewer visually recognizes the display surface, although the display image may be viewed not only from the front but also from an oblique direction. In some cases, the visibility of the display image, such as the color and contrast, differs depending on the difference.

  An object of the present invention is to provide a digital photo frame that can ensure good visibility even when the viewing angle of the display surface is different.

  The digital photo frame of the present invention includes a display unit having different visibility of a display image due to a difference in viewing angle of the display surface, a detection unit that detects a position of a person viewing the image displayed on the display unit, And an image processing unit that performs image processing for changing the visibility of the image based on a detection result by the detection unit.

  According to the digital photo frame of the present invention, good visibility can be ensured even when the viewing angle of the display surface is different.

It is a perspective view which shows the external appearance of the digital photo frame which concerns on embodiment. 1 is a block diagram showing a system configuration of a digital photo frame according to an embodiment. FIG. It is a graph for demonstrating the difference in the visibility of the color of the image displayed on the organic electroluminescent display which concerns on embodiment. 4 is a flowchart for explaining processing performed by a CPU based on an imaging signal output from an imaging unit in the digital photo frame according to the embodiment. It is a figure for demonstrating the positional relationship of a viewer and DPF. It is a figure for demonstrating the positional relationship of a viewer and DPF. It is a graph for demonstrating the difference in the correction amount of the color of the image displayed on the organic electroluminescent display which concerns on embodiment. It is a figure for demonstrating the positional relationship of a viewer and DPF. It is a figure for demonstrating the positional relationship of a viewer and DPF.

  Hereinafter, a digital photo frame according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the external appearance of a digital photo frame (hereinafter referred to as DPF) 2 according to the first embodiment. There are DPFs that are installed on a desk or the like, and those that are installed on a wall, etc. In this embodiment, the DPF is installed on a desk or the like (electrophotographic stand). Will be described as an example.

  As shown in FIG. 1, an organic EL (Electro Luminescence) display 4, a speaker 6, a signal receiving unit 8, and an imaging unit 10 are provided on the front surface of the DPF 2. The organic EL display 4 electrically displays information such as images for viewing and time, and the speaker 6 outputs music and audio. The signal receiving unit 8 receives a remote operation signal such as infrared rays output from an operation remote controller (not shown). The imaging unit 10 includes, for example, a wide-angle lens and is configured to be capable of imaging at a wide angle, and appreciates a person positioned within a predetermined range from the organic EL display 4, that is, a display image displayed on the organic EL display 4. The viewer is imaged. An imaging signal from the imaging unit 10 is output to a CPU 22 (see FIG. 2) described later.

  Further, on the upper surface of the DPF 2, a power switch 12 for turning on / off the power of the DPF 2 and an operation key 14 operated when setting the function of the DPF 2 or setting the display of the organic EL display 4 are provided. Also, on one side of the DPF 2, when connecting to a memory card slot 16 into which a memory card storing data such as images and music is inserted, a USB port 18 to which a USB device is connected, and a network such as the Internet. A network terminal 20 to be used is provided.

  FIG. 2 is a block diagram showing a system configuration of the DPF 2 according to the first embodiment. As shown in FIG. 2, the DPF 2 includes a CPU 22 that comprehensively controls each part of the DPF 2. Connected to the CPU 22 are the signal receiving unit 8, the power switch 12, the operation key 14, the memory card slot 16, the USB port 18, the network terminal 20, the internal memory 24, the display control unit 26, the reproduction control unit 28, and the imaging unit 10. Has been. The internal memory 24 stores DPF 2 function setting data and data such as images and music. The display control unit 26 performs display control of images and setting screens displayed on the organic EL display 4, and the reproduction control unit 28 performs reproduction control of music and audio output from the speaker 6.

  In this embodiment, the display image displayed on the organic EL display 4 has different color visibility depending on the angle at which the display surface of the organic EL display 4 is viewed. FIG. 3 is a graph showing the difference in visibility of the color (vertical axis) of the display image due to the difference in angle (horizontal axis) for visually recognizing the display surface of the organic EL display 4. As shown in the graph of FIG. 3, when the display surface of the organic EL display 4 is viewed from the front (viewing angle = 0 °) as a reference, the display surface is viewed from an oblique direction. When visually recognized (−170 ° ≦ angle <0 °, 0 ° <angle ≦ 170 °), the white balance of the image changes and the bluish color increases as the angle for visually recognizing the display surface increases. That is, to the viewer, the color of the display image appears different when viewing the display surface from the front and when viewing the display surface from an oblique direction.

  Next, with reference to a flowchart shown in FIG. 4, processing performed by the CPU 22 based on the imaging signal output from the imaging unit 10 in the DPF 2 according to the first embodiment will be described.

  First, the CPU 22 acquires an imaging signal in which a person located within a predetermined range is captured from the organic EL display 4 by the imaging unit 10 (step S10), and generates image data based on the imaging signal. And it is discriminate | determined from the produced | generated image data whether the person who is located in the predetermined range from the organic EL display 4, ie, the person (viewer) imaged by the imaging part 10 is one (step S11). That is, the CPU 22 regards a person (a person imaged by the imaging unit 10) located within a predetermined range as a viewer who is viewing the display image displayed on the organic EL display 4.

  When it is determined in step S11 that there is only one viewer (step S11, Yes), the CPU 22 specifies the position of the viewer and determines whether or not the viewer is located within a predetermined angle. It discriminate | determines (step S12). As shown in the graph of FIG. 3, the predetermined angle is a range of angles where there is no change in the white balance of the image and the color of the display image is not visible (for example, −20 ° ≦ angle ≦ 20 °), It is set in advance and stored in the internal memory 24 or the like. When it is determined in step S12 that the viewer is located within the predetermined angle (step S12, Yes), for example, as shown in FIG. 5, the viewer A is alone and is positioned substantially in front of the DPF 2. If so, the CPU 22 displays an image formed from the image data recorded in the memory card or the internal memory 24 on the organic EL display 4 without performing image processing.

  On the other hand, when it is determined in step S12 that the viewer is not located within the predetermined angle (step S12, No), for example, as shown in FIG. When the DPF 2 (organic EL display 4) is viewed from the outside, the CPU 22 performs image processing for changing the color on the image data recorded in the memory card or the internal memory 24 (see FIG. Step S13). In other words, image processing for adding a predetermined amount of yellow to the white balance of the image is performed, and an image formed from the image processed image data is displayed on the organic EL display 4. In this way, by performing correction that adds a predetermined amount of yellow to the image data, the viewer B is not a bluish image but a white-balanced image despite being viewed from an oblique direction. A good image can be visually recognized.

  FIG. 7 is a graph showing the correction amount of the color (white balance) of the display image due to the difference in the angle (horizontal axis) for viewing the display surface of the organic EL display 4. As shown in the graph of FIG. 7, when the display surface of the organic EL display 4 is viewed from the front (viewing angle = 0 °), the angle of viewing the display surface is based on the color (white balance) of the display image. As the size increases, image processing is performed to increase the yellowness of the white balance of the display image. That is, the display image when viewing the display surface from an oblique direction has a bluish color as shown in the graph of FIG. 3 so that the display image can be viewed with the same white balance as the display image when the display surface is viewed from the front. The displayed image is subjected to image processing for correcting color visibility. Note that the amount (predetermined amount) of adding yellow to the white balance varies depending on the angle at which the display surface is visually recognized as shown in the graph of FIG. 7, and is stored in the internal memory 24 as a table based on various angles, for example. Has been.

  If it is determined in step S11 that there is not one viewer, that is, two or more viewers (No in step S11), the CPU 22 determines that at least one of the viewers is within a predetermined angle and a predetermined distance. It is determined whether or not it is located within (step S14). The predetermined distance is a distance from the DPF 2 to the viewer, and is set in advance within a short distance where it can be predicted that the viewer will surely view the DPF 2 and is stored in the internal memory 24 or the like.

  When it is determined in step S14 that at least one of the viewers is not located within the predetermined angle and within the predetermined distance (step S14, No), for example, as shown in FIG. If neither is located within the predetermined distance d (located outside the predetermined distance d), the CPU 22 represents the representative positions of the viewers C and D (the angle with respect to the DPF 2 and the distance from the DPF 2). (In FIG. 8, position E) is calculated (step S15). Examples of the representative position include an average position, an intermediate position, and a gravity center position of the positions of the viewers C and D.

  Next, the CPU 22 performs image processing for adding a predetermined amount of yellow to white balance to the image data recorded in the memory card or the internal memory 24 (step S13). Specifically, based on the angle at which the display surface is visually recognized from the representative position E calculated in step S15, image processing for adding yellow to the white balance by the amount (predetermined amount) shown in the graph of FIG. Then, an image formed from the image data processed in step S13 is displayed on the organic EL display 4. In this way, by performing correction that adds a predetermined amount of yellow to image data, both viewers C and D can visually recognize an image with good white balance.

  On the other hand, if it is determined in step S14 that at least one of the viewers is located within a predetermined angle and within a predetermined distance (step S14, Yes), for example, as shown in FIG. When the viewer F is located within a predetermined angle and within a predetermined distance d of G, the CPU 22 performs image processing on an image formed from the image data recorded in the memory card or the internal memory 24. The image is displayed on the organic EL display 4 without being applied. That is, the viewer G who is viewing the image reliably in the vicinity of the DPF 2 can visually recognize an image with a good white balance. The display image is displayed on the organic EL display 4 without considering existence.

  In steps S14 and S15, an example in which two viewers are captured by the imaging unit 10 is described (see FIGS. 8 and 9). When three or more viewers are captured, Performs the same processing.

  According to the DPF 2 according to the first embodiment, good color visibility can be ensured even when the viewing angle of the display surface of the organic EL display 4 is different.

  Next, a DPF according to a second embodiment of the present invention will be described with reference to the drawings. In the DPF according to the second embodiment, a liquid crystal display is provided in place of the organic EL display 4 of the DPF 2 according to the first embodiment, and other configurations are the DPF 2 according to the first embodiment. Therefore, the description thereof is omitted, and the same components are described using the same reference numerals.

  In this embodiment, the display image displayed on the liquid crystal display has different contrast visibility depending on the angle at which the display surface is viewed. That is, when the display surface of the liquid crystal display is viewed from the front (viewing angle = 0 °) as a reference, the display surface is viewed from an oblique direction (−170 ° ≦ angle <0 °, When 0 ° <angle ≦ 170 °, the contrast of the display image gradually decreases as the angle for visually recognizing the display surface increases, similar to the change in the color of the image shown in the graph of FIG. That is, to the viewer, the contrast of the display image appears different when the display surface is viewed from the front and when the display surface is viewed from an oblique direction.

  Next, with reference to a flowchart shown in FIG. 4, processing performed by the CPU 22 based on the imaging signal output from the imaging unit 10 in the DPF according to the second embodiment will be described. In addition, since the process of step S10-S12, S14, and S15 is the same as the process of CPU22 in DPF2 which concerns on 1st Embodiment, description is abbreviate | omitted.

  When it is determined in step S12 that the viewer is not located within the predetermined angle (No in step S12), or in step S14, at least one of the viewers is located within the predetermined angle and within the predetermined distance. If the representative position of the plurality of viewers is calculated (step S15), the CPU 22 adds the image data recorded in the memory card or the internal memory 24. On the other hand, image processing for changing the contrast is performed (step S13). In other words, image processing for increasing the contrast of the image by a predetermined amount is performed, and an image formed from the image processed image data is displayed on the liquid crystal display.

  Specifically, an image that increases the contrast of an image as the viewing angle of the display surface increases with reference to the contrast of the image when the display surface of the liquid crystal display is viewed from the front (viewing angle = 0 °). Apply processing. That is, by increasing the contrast by the amount of contrast that decreases when the display surface is viewed from an oblique direction, the visibility of the image is corrected so that the same image as when the display surface is viewed from the front can be viewed. Note that the contrast correction amount (predetermined amount) of the display image differs depending on the angle at which the display surface is viewed, and is stored in the internal memory 24 as a table based on various angles, for example. In this way, by performing correction that increases the contrast by a predetermined amount on the image data, a viewer who is viewing from an oblique direction can view an image with good contrast, not an image with low contrast.

  The DPF according to the second embodiment can ensure good contrast visibility even when the angle at which the display surface of the liquid crystal display is viewed is different.

  In each of the above-described embodiments, the imaging unit 10 is provided as a detection unit that detects a person located within a predetermined range from the organic EL display 4 or the liquid crystal display. However, an infrared sensor or the like is used instead of the imaging unit 10. A human sensor may be provided. Further, the position of the operation remote controller that can be detected by receiving the infrared rays or the like output from the operation remote controller by the signal receiving unit 8 may be detected as the position of the viewer who operates the operation remote controller.

  2 ... Digital photo frame (DPF), 4 ... Organic EL display, 6 ... Speaker, 8 ... Signal receiver, 10 ... Imaging unit, 12 ... Power switch, 14 ... Operation keys, 16 ... Memory card slot, 18 ... USB port 20 ... Network terminal, 22 ... Control unit, 24 ... Internal memory, 26 ... Display control unit, 28 ... Playback control unit.

Claims (5)

A display unit in which the visibility of the display image varies depending on the angle at which the display surface is viewed,
A detection unit for detecting a position of a person viewing the image displayed on the display unit;
An image processing unit that performs image processing for changing the visibility of the image on the image based on a detection result by the detection unit;
A digital photo frame comprising: The display unit is configured by an organic EL display unit having different visibility of the color of the display image due to the difference in angle,
The digital photo frame according to claim 1, wherein the image processing unit performs image processing for changing the color on the image. The display unit is configured by a liquid crystal display unit having a different contrast visibility of the display image due to the difference in the angle,
The digital photo frame according to claim 1, wherein the image processing unit performs image processing for changing the contrast on the image. A calculation unit that calculates a representative position from the positions of at least two people detected by the detection unit;
4. The digital photo frame according to claim 1, wherein the image processing unit performs the image processing based on the representative position. 5.   The image processing unit does not perform the image processing when the person is located within a predetermined angle with respect to the display surface and the position is within a predetermined distance. 4. The digital photo frame according to any one of 3.

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