US20010013897A1 - Information processing device - Google Patents

Information processing device Download PDF

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Publication number
US20010013897A1
US20010013897A1 US09/731,919 US73191900A US2001013897A1 US 20010013897 A1 US20010013897 A1 US 20010013897A1 US 73191900 A US73191900 A US 73191900A US 2001013897 A1 US2001013897 A1 US 2001013897A1
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United States
Prior art keywords
image
displayed
information
photoelectric conversion
memory
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Abandoned
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US09/731,919
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English (en)
Inventor
Yousuke Kowno
Akira Ohmura
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Nikon Corp
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Nikon Corp
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Publication date
Application filed by Nikon Corp filed Critical Nikon Corp
Priority to US09/731,919 priority Critical patent/US20010013897A1/en
Publication of US20010013897A1 publication Critical patent/US20010013897A1/en
Priority to US10/095,524 priority patent/US7154544B2/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/69—Control of means for changing angle of the field of view, e.g. optical zoom objectives or electronic zooming

Definitions

  • the present invention relates to an information processing device.
  • the present invention relates to an information processing device for taking and displaying pictures electronically, and when displayed, the pictures can be either enlarged or reduced.
  • Such electronic cameras often have a liquid crystal display (LCD).
  • the LCD referred to as an electronic viewfinder, is used for displaying the picture images and provides real-time picture images of the objects or subjects being photographed by the user at the time of taking the picture which will be referred to hereinafter as “shooting the object”.
  • FIGS. 15 and 16 show an example of a conventional electronic camera 81 .
  • the electronic camera 81 light from the object that enters through a shooting lens 101 is converted into electrical signals by a photoelectric conversion element (not shown in the figure) and the electrical signals are digitized to create image data.
  • a focal length changing switch 107 changes the focal length of the shooting lens 101 , for example, between either a “NORMAL” mode or a “TELEPHOTO” mode.
  • the focal length changing switch 107 is switched to the “TELEPHOTO” mode, the shooting lens 101 is adjusted so that the focal length becomes longer, and the image of the object becomes larger than the image in the “NORMAL” mode and is displayed on the LCD 106 . In such manner, images of the object can be shot in either the “NORMAL” or “TELEPHOTO” modes.
  • the focal length can be changed at the time of shooting the object by operating the focal length changing switch 107 .
  • the object is displayed as enlarged on the LCD 106 .
  • operating the zoom button 105 enlarges the image displayed on the LCD 106 .
  • the focal length changing switch 107 is used at the time of shooting images and the zoom button 105 is used at the time of displaying the images retrieved from the memory. Therefore, a problem arises in that the user can be easily confused by these operations. Thus, the user can easily misuse the electronic camera, e.g., by pressing the wrong button.
  • the information processing device of embodiments of the present invention includes light collecting means for collecting light from an object or subject, photoelectric conversion means for receiving light from the object collected by the light collecting means and for converting the received light into electrical signals, memory means for storing specified image data and display means for displaying images of the object corresponding to the electrical signals converted by the photoelectric conversion means or corresponding to specified image data recorded in the memory means.
  • the information processing device also includes actuating means and zooming (e.g., enlarging/reducing) means.
  • the actuating means is operated at a time to perform a zoom operation with respect to the image projected by the light collecting means on the photoelectric conversion means and also operates when displaying images corresponding to the image data recorded in the memory means, on the displaying means by enlarging or reducing (i.e, zooming) the images.
  • the zooming means enlarges or reduces the image on the display, in response to actuating the actuating means, regardless of whether that image is being provided from the memory means or from the photoelectric conversion means.
  • the focal length of the light collecting means is changed.
  • the device can perform a digital zoom operation in which the focal length of the light collecting means remains fixed, but the image provided from the photoelectric conversion means is electronically enlarged or reduced, e.g., by interpolation or thinning.
  • the actuating means is actuated at the time of displaying the image corresponding to the image data recorded in the memory means, the image displayed on the display means is either enlarged or reduced. Therefore, misuse of the information processing device of the present invention can be reduced and the number of operating components can be reduced as well.
  • FIG. 1 is a front perspective view showing an information processing device of the present invention
  • FIG. 2 is a rear perspective view showing the information processing device of the present invention shown in FIG. 1;
  • FIG. 3 is a perspective view showing internal components of the information processing device of the present invention shown in FIGS. 1 and 2;
  • FIG. 4 is a block diagram showing an electrical structure of the information processing device of the present invention shown in FIGS. 1 and 2;
  • FIG. 5 is a diagram representing a 2 ⁇ 2 pixel area when the information processing device of the present invention is in a “L” mode;
  • FIG. 6 is a diagram representing a 3 ⁇ 3 pixel area when the information processing device of the present invention is in a “H” mode;
  • FIG. 7 illustrates a display screen of the information processing device of the present invention shown in FIGS. 1 and 2;
  • FIG. 8 illustrates the display screen displaying an image in a normal size
  • FIG. 9 illustrates the display screen displaying the image in FIG. 8 in an enlarged size
  • FIG. 10 illustrates the display screen displaying the image in the normal size
  • FIG. 11 illustrates the display screen displaying the image in FIG. 10 in a reduced size
  • FIG. 12 illustrates the image in FIG. 10 when the reduced image is centrally displayed
  • FIG. 13A- 13 D illustrates a point-and-drag system for enlarging and reducing the image
  • FIG. 14 illustrates another point-and-drag system for enlarging and reducing the image
  • FIG. 15 is a front perspective view showing a conventional electronic camera
  • FIG. 16 is a rear perspective view of the conventional electronic camera shown in FIG. 15;
  • FIG. 17 shows an example of an image displayed on a liquid crystal display of the conventional electronic camera shown in FIGS. 15 and 16;
  • FIG. 18 illustrates an enlarged image of the displayed image shown in FIG. 17;
  • FIG. 19 illustrates a left side of the enlarged displayed image shown in FIG. 17.
  • FIG. 20 illustrates a right side of the enlarged displayed image shown in FIG. 17.
  • FIGS. 1 and 2 are perspective views showing an electronic camera 1 , which is one embodiment of an information processing device of the present invention.
  • a side facing an object when shooting a picture, i.e., taking a picture, of the object is designated as a front face X 1
  • a side facing a user is designated as a rear face X 2 .
  • a viewfinder 2 used for confirming the scope of shooting the object light collecting means in a form of a shooting lens 3 that receives an optical image of the object and a strobe or flash 4 , that emits light to illuminate the object, are provided.
  • the viewfinder 2 and a speaker 5 that outputs sounds recorded by the electronic camera 1 , are provided.
  • display means in a form of an LCD 6 is disposed on the rear face X 2 and operation keys 7 are positioned below the viewfinder 2 and the speaker 5 .
  • a touch tablet 6 A is arranged to cover a surface of the LCD 6 .
  • the touch tablet 6 A outputs positional data that corresponds to a pointed position which is made by contacting the touch tablet 6 A with a pen-type pointing member 41 as shown in FIG. 4.
  • the touch tablet 6 A is fabricated of a transparent material, such as glass or resin, and the user can observe through the touch tablet 6 A the image displayed on the LCD 6 disposed behind the touch tablet 6 A.
  • the operation keys 7 are keys that are operated when previously recorded images are to be displayed on the LCD 6 .
  • the user supplies electrical signals through the operation keys 7 which are detected by a CPU 39 (FIG. 4).
  • a menu key 7 A among the operation keys 7 is for displaying a menu screen on the LCD 6 .
  • An execution key 7 B is activated for displaying previously recorded information which is selected by the user.
  • a clear key 7 C is activated for deleting the previously recorded information.
  • a cancel key 7 D is activated for canceling, i.e., terminating, the display of the previously recorded information.
  • a scroll key 7 E is activated for scrolling the screen in upward and downward directions after a list of the recorded information is displayed on the LCD 6 .
  • a slidable LCD cover 14 which protects the LCD 6 when the LCD 6 is not in use.
  • the LCD cover 14 covers the LCD 6 as well as the touch tablet 6 A when the LCD cover 14 is moved in an upward direction shown by arrow A.
  • the LCD cover 14 is moved in the downward direction shown by arrow B, the LCD 6 and the touch tablet 6 A appear.
  • a microphone 8 that collects sound
  • an earphone jack 9 to which a conventional earphone (not shown) can be connected, are provided.
  • a release switch 10 On a first side Y 1 , shown in FIG. 1, a release switch 10 , a zoom button 15 and a continuous shooting mode changing switch 13 are provided.
  • the release switch 10 is activated when shooting the object.
  • Actuating means in the form of the zoom button 15 is activated when changing a focal length of the shooting lens 3 when shooting the object.
  • Zoom button 15 also is operated when changing magnification of the displayed image when displaying a previously recorded image.
  • zoom refers to a process in which the image is either enlarged or reduced.
  • Zooming can be accomplished mechanically (for example, by driving a lens system to change the focal length of a shooting lens) or electronically (for example, by interpolation or thinning, i.e., data manipulation), which sometimes is referred to as “digital zoom.”
  • the continuous shooting mode changing switch 13 is activated to change shooting modes before shooting the object.
  • the zoom button 15 and the continuous shooting mode changing switch 13 are arranged below the viewfinder 2 , shooting lens 3 and strobe 4 which are provided on the upper section of the front face X 1 .
  • a sound recording switch 12 for activation when recording sounds, and the power switch 11 are provided.
  • the power switch 11 is arranged below the viewfinder 2 , the shooting lens 3 and the strobe 4 which are provided on the upper part of the front face X 1 , similarly to the above described release switch 10 and power switch 11 .
  • the sound recording switch 12 is positioned on the second side Y 2 at substantially the same height as the release switch 10 on the first side Y 1 to facilitate their use when the electronic camera is held by either the user's right hand or the left hand.
  • the respective heights of the release switch 10 and the sound recording switch 12 can be different so that when one of the switches is pressed by the user's finger, the other switch is not accidentally pressed.
  • the continuous shooting mode switch 13 is used when setting whether the image is to be shot for just one frame or for a specified plurality of frames when the user presses the release switch 10 .
  • the release switch 10 is pressed and the continuous shooting mode switch 13 is in a position labeled as “S” (i.e., a “S” mode), only one frame of picture is shot.
  • the zoom button 15 has two built-in switches normally disposed in an OFF state. One switch moves to the ON state while a section of the zoom button 15 labeled “T” is being pressed. The other switch moves to the ON state while another section of the zoom button 15 labeled “W” is being pressed. When neither of the switches is pressed (i.e., when the zoom button 15 is not activated), the two switches are in the OFF state.
  • the focal length of the shooting lens 3 can be continuously changed while shooting the object. Accordingly, by changing the focal length of the shooting lens 3 , the magnification of the image of the object displayed on the LCD 6 also changes. The object is displayed as being enlarged if the focal length is lengthened and is displayed as being reduced if the focal length is shortened.
  • the zoom button 15 can be actuated to enlarge or reduce a previously recorded image being displayed on the LCD 6 . While the previously recorded image is being displayed, if the section of the zoom button 15 labeled “T” is pressed, one of the two switches of the zoom button 15 moves to the ON state. In response to the ON state of the switch, the previously recorded image displayed on the LCD 6 is enlarged. On the other hand, by pressing the section of the zoom button 15 labeled “W”, the other switch moves to the ON state and in response, the previously recorded image displayed on the LCD 6 is reduced.
  • FIG. 3 is a perspective view showing, by way of example, the internal structure of the electronic camera shown in FIGS. 1 and 2.
  • Photoelectric conversion means in the form of a CCD 20 is provided on a rear portion of the shooting lens 3 and constructed to photoelectrically convert the optical image of the object formed through the shooting lens into corresponding electronic image signals.
  • Other types of photoelectric conversion devices can be used in place of the CCD 20 .
  • cylinder-shaped batteries 21 such as AA dry cells, are disposed within the electronic camera 1 and supply electricity to appropriate components of the electronic camera 1 .
  • a condenser 22 accumulates the electric charge needed for the strobe or flash 4 to emit light and is arranged juxtaposed the batteries 21 .
  • Various control circuits that control each part of the electronic camera 1 of the present invention are formed on a circuit board 23 .
  • a memory card or recording medium 24 that can be inserted into or ejected from the electronic camera 1 is provided.
  • Various types of information to be input to the electronic camera 1 can be recorded on the memory card 24 .
  • an LCD switch 25 arranged adjacent to the power switch 11 moves to the ON state only while a protruding part of the LCD switch 25 is being pressed.
  • the LCD cover 14 is moved in the downward direction “B”, the LCD switch 25 is switched to the ON state by the arm 14 A of the LCD cover 14 .
  • the power switch 11 can be operated by the user independently from the LCD switch 25 . While both the power switch 11 and the LCD switch 25 are in the ON state, electricity is supplied to power the LCD 6 . On the other hand, when the LCD switch 25 is in the OFF state, i.e., when the LCD cover 14 is closed, the LCD switch 25 is in the OFF state. At this time, if the power switch 11 is in the ON state, electricity is supplied to power other circuits.
  • the memory card 24 is insertable into and ejectable from the electronic camera 1 .
  • a permanent memory device can be provided on the circuit board 23 and various types of information can be recorded on the permanent memory device. It is also possible to output the various types of information recorded in the permanent memory device or the memory card 24 to an external personal computer or the like through an interface (not shown).
  • the CCD 20 that includes a plurality of pixels photoelectrically converts an optical image formed on each pixel into electrical image signals.
  • a digital signal processor 33 (referred hereafter as DSP) supplies horizontal-CCD driving pulses to CCD 20 and controls a CCD driving circuit 34 (VDRV) to supply vertical-CCD driving pulses to the CCD 20 .
  • a correlated double sampling circuit 31 (referred hereinafter as CDS) is controlled by the CPU 39 and samples the electrical image signals that the CCD 20 photoelectrically converts. Then, the sampled signals are amplified to a predetermined level with an automatic gain control circuit 31 A (referred hereinafter as AGC)
  • An analog/digital converting circuit 32 (referred hereinafter as A/D converting circuit) digitizes the signals sampled at the CDS 31 and supplies them to the DSP 33 .
  • a compression/decompression circuit and memory controller 35 controls a data bus that interconnects the DSP 33 , a buffer memory 36 and the memory card 24 .
  • the electrical image signals supplied to the DSP 33 are temporarily stored in appropriate data areas, which are described in detail below, of the buffer memory 36 .
  • the image data stored in the data area of the buffer memory 36 is read, and after compressing the image data, the compressed image data (referred hereinafter as “shot image data”) is recorded in a shot image recording area of the memory card 24 .
  • the buffer memory 36 is divided into a data area and a frame memory area.
  • the data area of the buffer memory 36 is utilized, in addition to temporarily maintaining the data being processed, to reduce differences of input and output speed of data to and from the memory card 24 and processing speed of the CPU 39 , DSP 33 , or the like.
  • the frame memory area is used as a frame memory that maintains values of each pixel of the LCD 6 .
  • the data area could be a plurality of data areas and that the frame memory area could be a plurality of frame memory areas. Further, other areas described herein can be construed as singular or plural.
  • the compression/decompression circuit and memory controller 35 stores the image data supplied to the DSP 33 into the frame memory area of the buffer memory 36 and displays the image data on the LCD 6 . Then, after reading the shot image data from the memory card 24 and decompressing the shot image data, the compression/decompression circuit and memory controller 35 stores the decompressed image data in the frame memory area of the buffer memory 36 and also displays the decompressed image data on the LCD 6 .
  • the compression/decompression circuit and memory controller 35 manages the recording of the data to the memory card 24 and the timing for inputting and outputting data to storing the decompressed data to the buffer memory 36 .
  • the compression/decompression circuit and memory controller 35 has a built-in timer circuit and backup batteries, which are not shown FIG. 4, for recording date and time information when the images are shot in the shot image recording area of the memory card 24 as header information (i.e. date and time data is added to the shot image data recorded in the shot image recording area of the memory card 24 ).
  • the microphone 8 inputs sound information and supplies the sound information to a sound processing circuit 42 (sound IC).
  • the sound IC 42 digitizes the sound information supplied to it and outputs the digitized sound information to the CPU 39 .
  • the CPU 39 records the sound data in a sound recording area of the memory card 24 after temporarily storing it in the data area of buffer memory 36 after the sound data has been digitized and compressed. At this time, the data indicating the recording date and time is recorded as the header information of the sound data in the sound recording area of the memory card 24 .
  • the sound IC 42 converts the sound data supplied from the CPU 39 into analog signals and the analog sound signals are output to the speaker 5 .
  • the CPU 39 reads an X-Y coordinate of the position of the touch tablet 6 A that was pressed and accumulates the coordinate data (such as line-drawing information which will be described later) for storage into the data area of the buffer memory 36 .
  • the coordinate data such as line-drawing information which will be described later
  • CPU 39 causes the coordinate data accumulated in the buffer memory 36 to be recorded into a line-drawing information recording area of the memory card 24 with header information indicating the date and/or time of the line-drawing information.
  • the CPU 39 receives and properly processes signals received from various operation switches 40 , such as the power switch 11 , the zoom button 15 or sound recording switch 12 .
  • the CPU 39 controls a strobe driving circuit 37 to appropriately actuate the strobe or flash 4 .
  • CPU 39 controls an AF driving circuit 30 to move a first lens 3 A, that is a component of the shooting lens 3 , for automatic focus operations.
  • the CPU 39 also controls a zoom driving circuit 43 in response to the operation of the zoom button 15 to change the focal length of the shooting lens 3 by moving a second lens 3 B that is a component of the shooting lens 3 .
  • the CPU 39 facilitates changes in the magnification of the displayed image displayed by enlarging or reducing the image in response to the operation of the zoom button 15 .
  • the CPU 39 For enlarging the image, the CPU 39 creates an enlarged image by interpolating values of pixels of the enlarged image from the values of each pixel of the original image stored in the frame memory area of the buffer memory 36 and stores the enlarged image in the frame memory area. In contrast, for reducing the image, the CPU 39 creates a reduced image by reducing specified pixels from the original image stored in the frame memory area of the buffer memory 36 and stores the reduced image in the frame memory area.
  • the CPU 39 does not change the focal length of the shooting image 3 even if the zoom button 15 is actuated.
  • the optical image of the object observed by the viewfinder 2 is collected by the shooting lens 3 and is formed onto the CCD 20 that has a plurality of pixels.
  • the optical image of the object formed on the CCD 20 is photoelectrically converted to electrical image signals at each pixel and sampled by the CDS 31 .
  • the electrical image signals sampled by the CDS 31 are supplied to the A/D converting circuit 32 , digitized and output to the DSP 33 .
  • the DSP 33 outputs the image data to the data area of the buffer memory 36 .
  • the compression/decompression circuit and memory controller 35 reads the image data from the buffer memory 36 and compresses the image data in accordance with the JPEG (Joint Photographic Experts Group) format in which discrete cosine conversion, quantization and Huffman encoding are combined.
  • the DSP 33 records the image data in the shot image recording area of the memory card 24 .
  • the data indicating the date and/or time of shooting the image is recorded as header information of the shot image data in the shot image data recording area of the memory card 24 .
  • Compression techniques other than the JPEG techniques could be used as an alternative.
  • the CDS 31 divides the pixels of the CCD 20 that are arranged in a shape of a matrix into areas with each area composed of an array of 2 ⁇ 2 pixels (4 pixels) as shown in FIG. 5. Then, an image signal of one pixel located at the specified position is sampled, and the remaining three pixels are skipped.
  • a pixel “a” at the left upper position in each area is sampled and the other pixels “b”, “c” and “d” are skipped.
  • the pixel “b” at right upper position in each area is sampled, and the other pixels “a”, “c” and “d” are skipped.
  • the left lower pixel “c” and the right lower pixel “d” are sampled, respectively, and the other pixels are skipped. That is, each pixel is sampled in every four frames.
  • the image signals sampled by the CDS 31 (image signals of 1 ⁇ 4 (one quarter) of the total pixels of the CCD 20 ) are supplied to the A/D conversion circuit 32 , and output to the DSP 33 as digitized.
  • the DSP 33 outputs the digitized image signals to the data area of the buffer memory 36 and the compression/decompression circuit and memory controller 35 reads out the image signals and, after compressing the image signals by the JPEG method, records the digitized and compressed shot image data in the shot image recording area of the memory card 24 . At this time, date and time are recorded as the header information of the shot image data in the shot image recording area of the memory card 24 .
  • the CDS 31 divides the pixels of the CCD 20 arranged in a matrix shape into individual areas, each of which is composed of 3 ⁇ 3 pixels as shown in FIG. 6. Then, the electrical image signals of one pixel which is arranged at a specified position within each matrix are sampled at a rate of 30 times per second and the remaining eight pixels are skipped.
  • each pixel “a” in each area is sampled, and the other pixels “b” to “i” are skipped.
  • the pixel “b” arranged to the right of the pixel “a” is sampled, and the other pixel “a” and pixels “c” to “i” are skipped.
  • each of pixels “c” through “i” is sampled, and the other pixels are skipped. That is, each pixel is sampled every 9 frames.
  • the image signals sampled by the CDS 31 (image signals of pixels that are ⁇ fraction (1/9) ⁇ of the total pixels of the CCD 20 ) are supplied to the A/D converter circuit 32 , at which the image signals are digitized and output to the DSP 33 .
  • the DSP 33 outputs the digitized image signals to the data area of the buffer memory 36 .
  • the compression/decompression circuit and memory controller 35 reads the image signals and, after compressing the image data in accordance with the JPEG method, records the digitized and compressed shot image data in the shot image recording area of the memory card 24 with the header information containing the shot date and/or time.
  • the strobe 4 can be operated to illuminate light to the object, if necessary.
  • the touch tablet 6 A is is fabricated from a transparent material, the user can observe on the LCD 6 the point at a location pressed by the tip of the pen 41 so that the user feels as if the user directly input the point using the pen 41 on the LCD 6 . Moreover, if the pen 41 is moved on the touch tablet 6 A, a line according to the movement of the pen 41 is displayed on the LCD 6 . Furthermore, if the pen 41 is intermittently moved on the touch tablet 6 A, a broken line is displayed on the LCD 6 . As described above, the user can input desired line-drawing information, such as characters and figures, on the touch tablet 6 A for display on the LCD 6 .
  • the line-drawing information includes the shot image information in the frame memory area of the buffer memory 37 and is simultaneously displayed on the LCD 6 .
  • the user can select colors, such as black, white, red or blue, of the line-drawing information displayed on the LCD 6 by controlling a color selection switch (not shown).
  • the line-drawing information accumulated in the data area of the buffer memory 36 is supplied to the memory card 24 with the header information of the input date (and/or time) and recorded in line-drawing information recording area of the memory card 24 .
  • the line-drawing information that is recorded in the memory card 24 can be compressed. Because the line-drawing information input to the touch tablet 6 A includes information having a high spatial frequency, if the JPEG compression method were to be used, the compression efficiency would not be satisfactory. Moreover, the time required for compressing and decompressing the information is long: In addition, compression using the JPEG method is irreversible and is thus not appropriate for compressing small amounts of line-drawing information. This is because when the data is decompressed and displayed on the LCD 6 , imperfections such as gathering, blurring and the like become prominent.
  • the line-drawing information is compressed by a run-length method that is used in facsimile machines and the like.
  • the run-length method is a method which compresses the line-drawing information by horizontally scanning the line-drawing screen and coding continuous lengths of information, i.e., points, in each color, such as black, white, red and blue, and continuous lengths where there is no pen input.
  • the line-drawing information is compressed to a minimum, and even when the compressed line-drawing information is decompressed, imperfections of information can be reduced. In addition, when the amount of line-drawing information is relatively small, it can be designated that the line-drawing information is not to be compressed.
  • the shot image data and the line-drawing information input by the pen 41 are combined in the frame memory area of the buffer memory 36 , and the combined image of the shot image and line-drawing is displayed on the LCD 6 .
  • the shot image data is recorded in the shot image recording areas and the line-drawing information is recorded in the line-drawing information recording area.
  • the user can delete any one of the images from the combined image of the shot image and line-drawing.
  • each image data can be compressed by different compression methods.
  • recording date information 50 which, in this case, is Aug. 25, 1995, is displayed in a lower part of the screen and recording time information 51 , such as 10:05, is displayed at a leftmost portion of the display screen.
  • thumbnail images 52 are displayed on a right side of the recording time information 51 .
  • the thumbnail images 52 are minimized images of the shot image data recorded in the memory card 24 which were created by reducing bitmap data of each. image data. Therefore, the information with such display is information that includes shot image files. That is, image information is included in the information recorded at “10:16” and “10:21,” and no image information is included in the information recorded at “10:05”, “10:28”, “10:54” or “13:10.”
  • a memo symbol 53 is shown as an “*” and indicates that a predetermined memo is recorded as line-drawing information.
  • sound information bars 54 are horizontally displayed. Each of the bars has a specified length corresponding to a length of time associated with the sound recording. When no sound information is recorded, a sound information bar does not appear.
  • the user selects and designates the information on the LCD 6 shown in FIG. 7 to be displayed by pressing any portion of the displayed line of the desired information with the tip of the pen 41 .
  • the selected information is displayed (or played in the event the sound information bar is selected) by pressing the execution key 7 B shown in FIG. 2, preferably with the tip of the pen 41 .
  • the CPU 39 reads the sound data corresponding to the selected recording time, i.e., 10:05, from the memory card 24 and supplies it to the sound processing circuit 42 after decompressing the sound data.
  • the sound processing circuit 42 plays the sound through the speaker 5 after converting the supplied sound data into analog signals.
  • the user selects the information of the shot image data by pressing a desired thumbnail image with the tip of the pen 41 and then the selected information is displayed by pressing the execution key 7 B.
  • the CPU 39 instructs the compression/decompression circuit and memory controller 35 to read the shot image data corresponding to the selected shot data from the memory card 24 . Then, the compression/decompression circuit and memory controller 35 decompresses the compressed shot image data from the memory card 24 , stores the shot image data in the frame memory area of the buffer memory 36 as bitmap data, and displays the shot image data on the LCD 6 .
  • the images shot in the S mode are displayed on the LCD 6 as still images. Therefore, these still images are images in which image signals of the total number of pixels of the CCD 20 are displayed.
  • the images shot at the L mode are continuously displayed on the LCD 6 at a rate of 8 frames per second. At this time, the number of pixels displayed in each frame is 1 ⁇ 4 of the total number of pixels of the CCD 20 .
  • the images shot in the H mode are continuously displayed on the LCD 6 at the rate of 30 frames per second.
  • the number of pixels displayed in each frame is ⁇ fraction (1/9) ⁇ of the total number of pixels of the CCD 20 , the user can view the images shot in the H mode displayed on the LCD 6 without sensing the degradation of picture quality for the same reason as in the L mode.
  • the CDS 31 reduces the pixels of the CCD 20 at a level in which the user does not sense the degradation of picture quality at the time of displaying the images previously shot in the L mode or H mode, the load on the compression/decompression circuit and memory controller 35 can be reduced.
  • the DSP 33 and the compression/decompression circuit and memory controller 35 can be operated at low speed and low power consumption.
  • the electronic camera can be produced at a low cost, and have a low power consumption capability.
  • the zoom button 15 is operated while a previously recorded image is being displayed on the LCD 6 , the displayed image can be enlarged or reduced.
  • the magnification of the displayed image can be continuously adjusted in response to the actuation of the zoom button 15 .
  • date and time data is added as header information to each type of information or data that is recorded in the memory card 24 , as described above.
  • the user then can select desired information from the date and/or time data displayed on the LCD 6 and then display the data (FIG. 7).
  • each item of information is recorded separately in specified areas of the memory card 24 .
  • the header information having the same date and/or time is added to each item of information.
  • each item of the informations A, B and C that are recorded in specified areas of the memory card 24 have the same header information of date and/or time data.
  • the header information of information A can be set as the date input data
  • the header information of the other items of informations B and C can be set as data that relates to information A.
  • the simultaneously input information is displayed (or played, when sound is previously recorded) at the same time when displaying previously recorded images.
  • first information e.g. shot image
  • second information e.g. line-drawing
  • first information e.g. shot image
  • second information e.g. line-drawing
  • the release switch 10 is pressed to commence shooting the object and when previously recorded sound information that has been recorded in advance is being played, header information of the previously sound recorded information is recorded and added to the shot image data.
  • the shot image data is recorded in the shot image recording area of the memory card 24 .
  • the header information at 10:06 on Aug. 25; 1995 can be added to the shot image data which is recorded in the shot image recording areas of the memory card 24 .
  • either one of these times, i.e., 10:05 or 10:06, can be used as the header information.
  • Each time could be used as a default and the user could select which time is to be used as the default.
  • the same header information as the header information of the recording date (and/or time) for the sound information or the line-drawing information is recorded with the shot image data in the shot image recording area of the memory card 24 .
  • the same header information as the header information of the recording date (and/or time) for the shot image information is recorded in the line-drawing recording area of the memory card 24 .
  • the same header information as the header information of the recording date (and/or time) for the shot image information or line-drawing information is recorded with the sound information in the sound recording area of the memory card 24 .
  • the same header information as the header information of the recording date (and/or time) for the line-drawing information is recorded with the shot image information in the shot image recording area of the memory card 24 .
  • the same header information as the header information of the recording date (and/or time) for the line-drawing information is recorded with the sound information in the sound recording area of the memory card 24 .
  • the recording date for the first information becomes the header information of the second information (hereafter called normal mode).
  • the second information when the second information is added to the first information that has been previously recorded, not only the input time of the second information is recorded as the header information of the second information, but also the header information of the first information can be replaced with the header information of the second information (hereafter referred as recording time changing mode).
  • recording time changing mode a mode changing switch for the recording time (not shown in the figures) can be provided to the electronic camera 1 to change the recording time with the selection by the user for changing between the normal mode and recording time changing mode.
  • the above recording time mode changing switch is switched to the recording time changing mode and the object is shot while displaying the recorded line-drawing information (i.e. the shot image is the second information). Then, the input date of the shot image (second information) is added as the header information to both the line-drawing information (first information) and the shot image (second information).
  • priorities can be added to the information to be input, and the header information of the input time can be added to each item of information in response to the priorities.
  • the priorities for the shot image, sound information and the line-drawing information are designated as first, second and third, respectively and if the sound information is input while the line-drawing information that has been previously recorded, the header information including the input time of the sound information is added to both line-drawing information and the sound information that are recorded to the memory card 24 because the priority of the sound information is, for example, higher than that of the line-drawing information.
  • the header information including the input time of the shot image is added to the line-drawing information, the sound information and the shot image which are recorded in the memory card 24 because the priority of the shot image is higher than that of the other information.
  • the release button 10 is pressed first, the object is shot for one frame. At this time, the date and/or time of shooting the object is recorded as the header information in the shot image data that is recorded in the memory card 24 . Moreover, if the release button 10 is continuously pressed, the shot image is displayed on the LCD 6 . Additionally, at this time, if the sound recording switch 12 is pressed, the sound information is inputted. At this time, the date of shooting is added as the header information in the sound data information that is recorded in the sound information recording area of the memory card 24 .
  • the continuous shooting mode changing switch 13 switched to the L mode or the H mode (the continuous shooting modes) is described.
  • the release switch 10 is pressed first, and then the sound recording switch 12 is pressed, and when the release switch and the sound recording switch 12 are pressed at the same time, the shot image information and the sound information are recorded as follows.
  • the sound information that was recorded when the release switch 10 was pressed is recorded as one file in the sound information recording area of the memory card 24 . Thereafter, if the release switch 10 is pressed, the header information of time corresponding to each frame of the shot image information is recorded with the sound information.
  • the focal length of the shooting lens 3 is changed to optically change the magnification of the shot images.
  • the magnification of the shot image can be electronically (i.e., digitally) changed in response to the actuation of the zoom button 15 . This can be done by interpolating (to enlarge) or skipping or thinning (to reduce) the image data supplied by the CCD 20 .
  • the second embodiment has the same structure as the first embodiment, which uses the touch tablet 6 A and the same operations as the above operations to enlarge or reduce the displayed images, as well as changing the focal length of the shooting lens 3 at the time of shooting the objects.
  • portions of the displayed images to be enlarged can be selected by using the touch tablet 6 A.
  • the tip of the pen 41 presses on a dragging starting point “a” of the touch tablet 6 A disposed over the LCD 6 when a specified image is displayed on the LCD 6 .
  • the pen tip is dragged while pressing against touch tablet 6 A to a dragging ending point “b”.
  • the CPU 39 receives from the touch tablet 6 A a coordinate value of the dragging starting point “a” and the dragging ending point “b” and calculates a distance of dragging from the dragging starting point “a” to the dragging ending point “b” and an angle “x”.
  • Angle “x” is an angle formed between an imaginary horizontal line and a straight line formed between the dragging starting point “a” and the dragging ending point “b” as shown in FIG. 8. Then, if angle “x” is within a scope of a table of specified angles stored in the memory card 24 , the image is enlarged at a magnification proportional to the distance of the dragging such that the dragging starting point “a” is displayed at the center of the LCD 6 as shown in FIG. 9.
  • a preset background 72 is displayed in the margins of the LCD 6 which is created from reducing the image.
  • a centering button 71 is displayed on a top portion of the reduced image. If the button 71 is pressed with the pen 41 , the center of the image is repositioned at the center of the LCD 6 , and the entire reduced image is displayed substantially centrally of the LCD 6 as shown in FIG. 12.
  • the touch tablet 6 A covering the LCD 6 is divided into four areas “A” through “D” which are an upper right area, a lower right area, an upper left area, and a lower left area. Then, as shown in FIG. 13A, if the dragging starting point “a” is in area A, and if the direction of the dragging is within a range between 0 degrees to 90 degrees, the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and enlarges the image at a magnification corresponding to the distance of the dragging.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and reduces the image at a reduction corresponding to the distance of the dragging.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and enlarges the image at a magnification corresponding to the distance of the dragging. Conversely, if the dragging starting point “a” is in area B and if the direction of the dragging is within a range of 90 degrees and 180 degrees, the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and reduces the image at a reduction corresponding to the distance of the dragging.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and enlarges the image at a magnification corresponding to the distance of the dragging. Conversely, if the dragging starting point “a” is in area C, and if the direction of the dragging is within a range between 0 degrees and 270 degrees, the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and reduces the image at a reduction corresponding to the distance of the dragging.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and enlarges the image at a magnification corresponding to the distance of the dragging. Conversely, if the dragging starting point “a” is in area D and if the direction of the dragging is within a range between 0 degrees and 90 degrees, the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and reduces the image at a reduction corresponding to the distance of the dragging.
  • the corresponding relationships between the direction of the dragging by the pen 41 and the enlargement and reduction of the displayed image can be set as described in FIG. 14.
  • the touch tablet 6 A covering the LCD 6 is divided into four areas A through D which are right upper area, right lower area, left upper area, and left lower area.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and enlarges the image at a magnification corresponding to the distance of the dragging.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and reduces the image at a reduction corresponding to the dragging distance.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and enlarges the image at the magnification corresponding to the distance of the dragging. Conversely, if the dragging starting point “a” is in area B, and if the direction of the dragging is within a range between 45 degrees and 180 degrees or 180 degrees and 225 degrees, the CPU 29 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and reduces the image at a reduction corresponding to the dragging distance.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and enlarges the image at a magnification corresponding to the distance of the dragging.
  • the CPU 29 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and reduces the image at a reduction corresponding to the dragging distance.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and enlarges the image at a magnification corresponding to the distance of the dragging.
  • the CPU 39 designates the image at the dragging starting point “a” to be displayed at the center of the LCD 6 and reduces the image at a reduction corresponding to the dragging distance.
  • desired portions in the displayed image can be enlarged.
  • the enlarged or reduced image can be returned to its original size by touching any point on the touch tablet 6 A two consecutive times by the pen 41 .
  • the CPU 39 detects the distance and the direction of the dragging on the touch tablet 6 A in the same manner as the operations for changing the magnifications of the reproduced image described above. Then, the CPU 39 determines the direction for changing the focal length according to the direction of the dragging and changes the focal length of the shooting lens 3 in response to the distance of the dragging.
  • the corresponding relationships between the direction of the dragging and the direction for changing the focal length is set in the same manner as the corresponding relationships between the direction of the dragging and the direction for changing the size of the displayed image at the time of displaying the previously recorded image (FIG. 13 and FIG. 14).
  • the CPU 39 controls the zoom driving circuit 43 to increase the focal length of the shooting lens 3 .
  • the CPU 39 controls the zoom driving circuit 43 to reduce the focal length of the shooting lens 3 .
  • the CPU 39 changes to digital zooming after moving the second lens 3 B (that is a component of the shooting lens 3 ) to its upper limit value of the focal length, and performs signal processing on the image signals of the optically received image by the CCD 20 . Then, by electronically changing the magnification of the image of the object, the image of the object is enlarged at a magnification corresponding to an amount which exceeds the upper limit value of the focal length and is displayed on the LCD 6 .
  • the CPU 39 moves the second lens 3 B such that the focal length becomes the lower limit value. At this time, no special operations are performed for reducing the image of the object using the digital zoom.
  • the zoom button 15 if the zoom button 15 is operated in the same way as the first embodiment, the focal length of the shooting lens 3 can be changed and, in response thereto, the size of the displayed image is changed at the time of shooting the image. Operation of the zoom button 15 also changes the size of the previously recorded image at the time of displaying such an image. Then, by using the touch tablet 6 A, the focal length of the shooting lens 3 at the time of shooting the object can be changed and the size of the displayed image at the time of displaying the image can also be changed.
  • the CPU 39 changes to the digital zoom after the second lens 3 B is moved its upper limit of focal length.
  • the structure can be made so that only the second lens 3 B is movable to change the focal length to the upper limit value.
  • the digital zoom can be eliminated from the present invention. In this case, the image of the object to be displayed on the LCD 6 could not be enlarged beyond magnification higher than when the focal length is at the upper limit value.
  • the focal length of a shooting lens 3 also known as a zoom lens
  • the present invention also is applicable to electronic cameras that have a single focusing lens with a fixed focal length and that rely on a digital zoom process, for example, as described in the second embodiment, to change the magnification of the image of the object during shooting of the object by actuating a zoom button 15 or a touch tablet 6 A.

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US09/731,919 1996-06-14 2000-12-08 Information processing device Abandoned US20010013897A1 (en)

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US09/731,919 US20010013897A1 (en) 1996-06-14 2000-12-08 Information processing device
US10/095,524 US7154544B2 (en) 1996-06-14 2002-03-13 Digital camera including a zoom button and/or a touch tablet useable for performing a zoom operation

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JP8-153783 1996-06-14
JP8153783A JPH104531A (ja) 1996-06-14 1996-06-14 情報処理装置
US87447697A 1997-06-16 1997-06-16
US09/731,919 US20010013897A1 (en) 1996-06-14 2000-12-08 Information processing device

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