JP2004235804A - Portable terminal equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve conventional problems that picture resolution is degraded, and picture enlargement or reduction processing takes time because any one of original picture data and thumbnail picture data is used for the enlargement display or reduction display of the picture. <P>SOLUTION: In this portable terminal equipment, the thumbnail picture data are prepared from the obtained original picture data and both the picture data are compressed and stored in a picture file. The original picture data or the thumbnail picture data is then selected by comparing the display size of the thumbnail picture with the display size of the displayed picture in applying the enlargement display or the reduction display to the display picture displayed on a display section. Reduction processing is then applied to the selected picture data to prepare the enlarged or reduced picture data. By this processing, the picture resolution of the enlarged or reduced display picture is prevented from degradation to prepare the display picture. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable terminal device having a camera function.
[0002]
[Prior art]
2. Description of the Related Art In recent years, portable terminal devices have become smaller and more sophisticated. For example, a mobile phone has a large screen, and can display a large amount of character information and images.
[0003]
That is, the display screen of the portable terminal device is enlarged, so that a large amount of information can be displayed, and the use of the color display can be sufficiently used for displaying an image. Further, with respect to portable terminal devices, there is a demand for handling images that are not limited to the display screen size of the portable terminal devices as the amount of data communication increases dramatically.
[0004]
On the other hand, among recent mobile phones, there is a so-called camera mobile phone equipped with a camera equipped with an imaging lens and an image sensor that converts input light into an electric signal. Display size, camera resolution and processing power have been improved.
[0005]
When an electronic camera is connected to a conventional information processing apparatus, for example, a personal computer (hereinafter, referred to as a personal computer), image data acquired by the electronic camera is transferred to the personal computer. The camera image window on the display of the personal computer has three categories of display areas: a thumbnail image display area, an auxiliary information display area, and a detailed image display area. For example, in the detailed image display area, original image data acquired by the electronic camera is displayed, and the desired image of the user is enlarged and reduced by using the original image data (for example, And Patent Document 1).
[0006]
[Patent Document 1]
JP 2001-52191 A (page 5-9, FIG. 1-3)
[0007]
[Problems to be solved by the invention]
However, in a conventional mobile terminal device, for example, a camera-equipped mobile phone, image data is acquired using a digital camera mode and the image data is displayed on a display screen. However, the size of the display screen is limited. When displaying the acquired image data on the display screen, one of the original image data and the thumbnail image data of the image data is enlarged or reduced to be displayed in accordance with the size of the display screen. For this reason, the conventional camera-equipped mobile phone has a problem in that when using original image data having a display size larger than the display screen size, the processing time is long, a large amount of memory is required, and the like is inefficient.
[0008]
On the other hand, in the conventional camera-equipped mobile phone, when thumbnail image data having a smaller display size than the display screen size is used, the image size is enlarged to a display size larger than the thumbnail image data and displayed on the display screen, the image resolution is low. There was a problem that the display screen was displayed in the state.
[0009]
The present invention uses both image data of original image data and thumbnail image data, which are image data acquired by using the digital camera mode, and enlarges or reduces any desired image data at any time. An object of the present invention is to solve the above-described problem by performing enlarged display or reduced display of image data while maintaining image resolution.
[0010]
[Means for Solving the Problems]
The present invention has been made in view of the above-described circumstances, and a portable terminal device of the present invention stores first image data and second image data having different display sizes for the same image data. In a portable terminal device comprising a storage unit and a display unit for displaying the image data, a display size of third image data displayed on the display unit and a display size of the first image data or the second image data are displayed. When displaying the converted image data obtained by enlarging or reducing the third image data on the image data comparing means for comparing one of the display sizes and the display means, the first image data or the second image data is displayed. Image data size conversion display means for performing enlargement processing or reduction processing of the second image data. Therefore, the portable terminal device of the present invention can compare the first image data or the second image data when creating the converted image data, and select the appropriate image data of the two image data. While making the selection, the enlargement processing and the reduction processing can be performed.
[0011]
Further, in the portable terminal device of the present invention, the first image data has a larger display size than the second image data, and the image data comparing means uses the second image data. And Therefore, in the portable terminal device of the present invention, the processing capability of the image data comparing means can be improved by using the image data having the small display size as a reference.
[0012]
Further, in the portable terminal device according to the present invention, when the display size of the converted image data is equal to or smaller than the display size of the first image data, the image data size conversion display means outputs the first image data or It is characterized in that one of the second image data is reduced. Therefore, in the portable terminal device of the present invention, the image data size conversion display unit can prevent the deterioration of the image resolution of the converted image data by creating the converted image data by the reduction process.
[0013]
Further, in the portable terminal device of the present invention, when the display size of the converted image data is equal to or smaller than the display size of the second image data, the image data size conversion display means converts the second image data into The reduction processing is performed. Therefore, in the portable terminal device of the present invention, when the display size of the converted image data is smaller than or equal to the display size of the second image data, the image data is reduced by using the second image data. The resolution can be maintained and the processing time can be reduced.
[0014]
Further, the portable terminal device according to the present invention includes an imaging unit, and the image data is obtained through the imaging unit. Therefore, the portable terminal device of the present invention can be applied to image data obtained via the imaging means.
[0015]
In the portable terminal device according to the present invention, the first image data is original image data, and the second image data is thumbnail image data. Therefore, the portable terminal device of the present invention can be realized by using original image data and thumbnail image data.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. The present invention can be applied to any portable terminal device. Hereinafter, a foldable camera-equipped mobile phone 1 (hereinafter, referred to as a mobile phone) will be described as a preferred embodiment. Although a foldable mobile phone is shown below, the present invention is not limited to this mode, and may be, for example, a straight type mobile phone. Further, a case where a camera function is not provided may be used.
[0017]
First, FIG. 1 is a schematic view of the mobile phone according to an embodiment of the present invention, as viewed from the inside (key surface) in an open state (B) and from the outside (back side) in a closed state. FIG. 2 is a schematic functional block diagram illustrating an electrical configuration of the mobile phone.
[0018]
As shown in FIGS. 1A and 1B, for example, the speaker 2 is arranged at the upper center inside the lid of the mobile phone 1, and the microphone 3 is arranged at the lower center inside the main body. The key operation unit 18 includes a camera key for activating the camera mode, a shutter key for performing photographing, a power key for turning on the power, a mail key for activating the mail mode, numeric / character keys, and the like. .
[0019]
The display unit 17 is arranged in a square shape inside the lid unit where the speaker 2 is arranged, and the second display unit 4 is arranged in a square shape near the center of the outside of the lid unit. Furthermore, the imaging unit 12 is disposed near the center near the hinge outside the lid, and can shoot while confirming the subject on the second display unit 4 even in the closed state. The rear key 5 is disposed below the second display unit 4 and is used as a shutter key in a closed state, which is suitable for the user to take a picture of himself. On the other hand, when taking a picture in an open state, it is possible to take a picture by pressing the shutter key of the key operation unit 18 while checking the subject on the display unit 17 or the second display unit 4.
[0020]
As shown in FIG. 2, the mobile phone 1 according to the present embodiment mainly includes a control unit 11, an imaging unit 12, an image processing unit 13, a first memory 14, a second memory 15, a display driver unit 16, and a display unit 17. , Key operation unit 18, shutter button 19, image reading unit 20, image development unit 21, third memory 22, fourth memory 23, image enlargement / reduction unit 24, antenna 25, wireless unit 26, communication control unit 27, back A light 28 is provided.
[0021]
The control unit 11 controls the operation of each part constituting the mobile phone 1, and controls, for example, the image processing unit 13, the display driver unit 16, the display unit 17, and the like. The imaging unit 12 includes an imaging lens, an imaging element such as a charge coupled device (CCD) image sensor or a complementary metal oxide semiconductor (CMOS) image sensor, and three color filters of RGB. The imaging unit 12 converts the light reflected by the subject and incident on the imaging lens into RGB three-color light through a color filter, and converts each of the RGB three-color light into an electric signal by the image sensor.
[0022]
The image processing unit 13 includes an amplification unit, an A / D (analog / digital) conversion unit, and a signal processing unit. The amplification unit amplifies the electrical signals corresponding to RGB sent from the imaging unit 12 and sends the amplified signals to the A / D conversion unit. The A / D converter converts the electrical signal (analog) corresponding to RGB amplified by the amplifier into a digital signal, outputs image data, and sends the image data to the signal processor. The signal processing unit performs signal processing such as pixel interpolation processing on the image data sent from the A / D conversion unit. Further, the signal processing unit sends the image data subjected to the signal processing to the first memory 14 based on the control signal sent from the control unit 11.
[0023]
The first memory 14 temporarily stores image data sent from the signal processing unit. For example, temporally old image data is deleted, or the newest image data is overwritten to temporarily store the image data.
[0024]
The control unit 11 sends a control signal to the display driver unit 16 and sends the image data stored in the first memory 14 to the display driver unit 16. The display driver section 16 applies a drive voltage to each pixel electrode of the display section 17 according to image data to be displayed on the display section 17. The display unit 17 is realized by a liquid crystal display, an EL (Electro Luminescence) display, or the like, and displays an image based on image data sent via the display driver unit 16.
[0025]
The backlight 28 includes a light emitting diode or the like, which is a light emitting element, and illuminates the display unit 17 from the back. Control of turning on / off of the backlight 28 and control of luminance adjustment are performed by the control unit 11. The backlight 28 may be turned on until a predetermined operation for turning off the backlight is performed by the user, or may be turned off when a predetermined time elapses after being turned on.
[0026]
The key operation unit 18 includes keys for inputting numbers and characters.
[0027]
The shutter button 19 is pressed when the user wants to shoot a desired image during camera shooting. Then, the control unit 11 stores and stores the image data stored in the first memory 14 in the second memory 15 in response to the instruction signal from the shutter button 19. Further, the second memory 15 stores image data stored in the first memory 14 and various kinds of reception data received via the antenna 25 and the like.
[0028]
The image reading unit 20 reads the image data stored in the second memory 15 and sends the image data to the image developing unit 21. The image expanding unit 21 expands the image data transferred from the image reading unit 20. At this time, the image data contains, for example, a DCF basic original image (hereinafter, referred to as an original image) and a DCF thumbnail image (hereinafter, referred to as a thumbnail image) due to characteristics of a DCF (Design rule for Camera File system) format. I do. Then, the image expanding unit 21 expands the original image data and the thumbnail image data. The developed original image data is sent to the third memory 22 and stored in the third memory 22. On the other hand, the developed thumbnail image data is sent to the fourth memory 23 and stored in the fourth memory 23.
[0029]
The image enlargement / reduction unit 24 performs an enlargement process or a reduction process on the image data sent from the third memory 22 or the fourth memory 23, and sends the enlarged or reduced image data to the display driver unit 16 as needed. The display driver section 16 applies a drive voltage to each pixel electrode of the display section 17 according to image data to be displayed on the display section 17.
[0030]
The antenna 25 transmits and receives voice data, character data, image data, and the like when performing wireless communication with a base station via wireless radio waves. The radio unit 26 demodulates data received from the base station via the antenna 25 during reception, and modulates and amplifies character data and image data transmitted from the communication control unit 27 during transmission, The signal is transmitted to the base station via the antenna 25. The communication control unit 27 sends received data such as character data and image data demodulated by the wireless unit 26 to the control unit 11 based on a predetermined communication protocol. The data received from the other party via the wireless unit 26 and the communication control unit 27 is stored in the second memory 15.
[0031]
Although FIG. 1B shows the second display unit 4, FIG. 2 omits the second display unit 4 and the display driver unit and the backlight associated therewith.
[0032]
Next, FIG. 3 is a flowchart for explaining a sequence of thumbnail generation for converting original image data input to the mobile phone of the present invention into thumbnail image data. FIG. 4 shows details of an image data file in the mobile phone. It is a schematic diagram which shows a structure.
[0033]
In the present embodiment, the subject can be photographed using the digital camera mode provided in the mobile phone 1. As described above, in the present embodiment, DCF format formation is adopted, and original image data and thumbnail image data are created from the image data output from the imaging unit 12 and stored in the second memory 15. Is stored. Although details will be described later, the thumbnail image data is formed by reducing the original image data, so that a plurality of image data can be simultaneously displayed on the same screen.
[0034]
As shown in FIG. 3, for example, it is assumed that the vertical size is Y and the horizontal size is X with respect to the image size of the original image data of the bitmap in the working memory, and the image size of the thumbnail image data is y. Assume that the horizontal size is x.
[0035]
First, the horizontal size X of the original image data is compared with the horizontal size x of the thumbnail image data. If X ≧ x (step S1) and X / Y ≧ x / y (step S2). YES), the original image data is reduced by x / X times at the same ratio so that the ratio between the vertical size Y and the horizontal size X does not change (step S3). If X / Y = x / y with respect to the reduced image data (YES in step S4), the reduced image data size matches the thumbnail image data size, and the reduced image data is used as the thumbnail size. The thumbnail image data is created in the area (step S5). On the other hand, if X / Y ≠ x / y for the reduced image data (NO in step S4), the reduced image data is centered and arranged in the thumbnail size area (step S6). Thereafter, the blank area of the thumbnail size area is filled with an arbitrary background color, and thumbnail image data is created (step S12).
[0036]
If X / Y <x / y (NO in step S2), the ratio between the vertical size Y and the horizontal size X of the original image data is y / Y times and the same ratio so that the ratio does not change. Reduce (Step S7). Then, the reduced image data is centered and arranged in the thumbnail size area (step S8). Thereafter, the blank area of the thumbnail size area is filled with an arbitrary background color, and thumbnail image data is created (step S12).
[0037]
If X <x (step S1) and Y ≧ y (YES in step S9), y is set so that the ratio between the vertical size Y and the horizontal size X of the original image data does not change. It is reduced by the same ratio to / Y times (step S7). Then, the reduced image data is centered and arranged in the thumbnail size area (step S8). Thereafter, the blank area of the thumbnail size area is filled with an arbitrary background color, and thumbnail image data is created (step S12).
[0038]
If Y <y (NO in step S9), the original image data size is already smaller than the thumbnail image data size, and the original image data is not reduced (step S10). Then, the original image data is centered and arranged in the thumbnail size area (step S11). Thereafter, the blank area of the thumbnail size area is filled with an arbitrary background color, and thumbnail image data is created (step S12).
[0039]
As described above, in the present embodiment, thumbnail image data is easily created by reducing the original image data and centering the reduced image data in the thumbnail size area. The method of creating thumbnail image data need not be limited to the method described above, but can be created by various methods.
[0040]
Next, as shown in FIG. 4, each data field of the image field in the present embodiment includes an original image field for storing the original image, and the original image is processed into a thumbnail image as described above with reference to FIG. It has a thumbnail image field for storing images and an image information field for storing image types and the like. Specifically, the original image data obtained using the digital camera mode of the mobile phone 1 is once stored in the first memory 14. Then, when the user checks the captured image via the display unit 17 and instructs to save the captured image data, the image data is stored in the second memory 15. At this time, as described above with reference to FIG. 3, thumbnail image data is created from the original image data, and the created thumbnail image data is also stored in the second memory 15. In the image storage memory of the second memory 15 shown in FIG. 4, original image data and thumbnail image data are image-compressed and stored for each record.
[0041]
The thumbnail image data is created when not only the original image data obtained via the digital camera mode of the mobile phone 1 but also the original image data downloaded via the network is stored in the second memory 15. The original image data acquired via the camera mode is stored, for example, in the JPEG format.
[0042]
Next, FIG. 5 is a flowchart for explaining the operation of the mobile phone of the present invention for enlarging or reducing the selected image, and FIG. 6 is for explaining the sequence for enlarging or reducing the displayed image data. FIG. 7 is a flowchart illustrating a sequence for comparing the converted image data with the thumbnail image data.
[0043]
First, as shown in FIG. 5, when the user selects a desired image using the image data selection mode of the mobile phone 1 and displays it on the display unit, the user operates the key operation unit 18 to operate the image data. When the start of the selection mode is instructed (step S21), the control unit 11 controls the display driver unit 16 to display the thumbnail image list display screen on the display unit 17 (step S22). Then, when the user operates, for example, a cross key of the key operation unit 18 according to the display screen, selects a desired thumbnail image on the screen, and presses an image display key (step S23), the control unit 11 displays the image. The controller 16 controls the driver 16 to display the selected thumbnail image at the same size on the display 17 (step S24). In this embodiment, in this case, the thumbnail images stored in the second memory 15 are decompressed and displayed on the display unit 17.
[0044]
The user checks the image displayed on the display unit 17 and desires to enlarge the image or to reduce the size of the image. When the key or the reduction display key is pressed (YES in step S25), the control unit 11 controls the third memory 22, the fourth memory 23, the image enlargement / reduction unit 24, etc. Image data or thumbnail image data is subjected to enlargement processing or reduction processing. Then, the control unit 11 further controls the display driver unit 16 to display the image data subjected to the enlargement processing or the reduction processing on the display unit 17 (step S26).
[0045]
Then, the user checks the image displayed on the display unit 17, and further desires to enlarge the image or to reduce the size of the image. The user presses the enlargement display key or the reduction display key 18 (YES in step S27). Also in this case, as described above, the original image data or the thumbnail image data of the image is enlarged or reduced, and the control unit 11 controls the display driver unit 16 to display the enlarged or reduced image data on the display unit. 17 is displayed (step S26).
[0046]
On the other hand, the user checks the image displayed on the display unit 17, and if the user does not want to enlarge or reduce the image (NO in step S27, NO in step S25), the user operates the key. When the save key of the unit 18 is pressed (YES in step S28), the control unit 11 stores the image data displayed on the display unit 17 in the second memory 15 (step S30). If the user does not save the enlarged or reduced image data, the user presses the clear key of the key operation unit 18 (YES in step S29), the image data selection mode ends, and the user waits. It will be in the receiving state. On the other hand, when the user does not press the clear key (NO in step S29), the display unit 17 remains in a state where the enlarged or reduced image is displayed. In this embodiment, the image data selection mode is terminated after the clear key is pressed in step S29. However, the present invention is not limited to this case, and various modes can be applied. For example, after pressing the clear key, the screen may return to the thumbnail image list display screen in step S22.
[0047]
Next, as shown in FIG. 6, a sequence of a process of enlarging or reducing display image data will be described. The user checks the image displayed on the display unit 17 (step S31), and presses an enlarged display key of the key operation unit 18 when the user desires to enlarge the displayed image (step S32). The control unit 11 compares the display size of the display image data with the display size of the thumbnail image data by the image data comparison means set in the control unit 11 (step S34). When the image data comparing means of the control unit 11 determines that the display size of the display image data is smaller than the display size of the thumbnail image data (YES in step S35), the thumbnail image data is The thumbnail image data sent to the enlargement / reduction unit 24 is reduced (step S36). Then, the control unit 11 controls the display driver unit 16 to display the reduced image data on the display unit 17 (step S31).
[0048]
On the other hand, the image data comparing means of the control unit 11 determines that the display size of the display image data is larger than the display size of the thumbnail image data (NO in step S35), and that the display size of the display image data is If it is determined that the size is smaller than the display size (YES in step S37), the original image data is sent from the third memory 22 to the image enlarging / reducing unit 24, and the sent original image data is reduced (step S38). . Then, the control unit 11 controls the display driver unit 16 to display the reduced image data on the display unit 17 (step S31). If the image data comparing means of the control unit 11 determines that the display size of the display image data is larger than the display size of the original image data (NO in step S37), the original image data is read from the third memory 22. The original image data sent to the enlargement / reduction unit 24 is enlarged (step S39). Then, the control unit 11 controls the display driver unit 16 to display the enlarged image data on the display unit 17 (step S31).
[0049]
On the other hand, the user checks the displayed image displayed on the display unit 17 (step S31), and presses the reduced display key of the operation key 18 when the user desires to display the reduced image (step S33). The sequence of the enlargement processing or reduction processing of the display image data thereafter is referred to the above description, and the description is omitted here.
[0050]
As described above, in the present embodiment, when the display image displayed on the display unit 17 is enlarged or reduced, the display size of the display image data and the thumbnail image are displayed by the image data comparison unit in the control unit 11. Compare with the display size of the data. When the display size of the display image data is equal to or smaller than the display size of the thumbnail image data, the thumbnail image data is reduced by the image enlargement / reduction unit 24, so that the display image is enlarged or reduced. In other words, in the present embodiment, the resolution of the display image can be prevented from deteriorating by reducing the size of the thumbnail image data regardless of whether the display image is enlarged or reduced.
[0051]
Similarly, in the present embodiment, when the display size of the display image data is larger than the display size of the thumbnail image data and equal to or smaller than the display size of the original image data, the original image data is enlarged / reduced. By performing the reduction process in the unit 24, the display image is enlarged or reduced. In other words, in the present embodiment, the resolution of the display image can be prevented from deteriorating by reducing the original image data regardless of whether the display image is enlarged or reduced.
[0052]
In this embodiment, when the display size of the display image data is larger than the display size of the thumbnail image data and is equal to or smaller than the display size of the original image data, the original image data is reduced by the image enlargement / reduction unit 24. To process. However, the display size of the thumbnail image data is greatly different from the display size of the original image data, and there is a problem that the reduction processing takes a long time. In this case, for example, the reference display size can be set between the display size of the thumbnail image data and the display size of the original image data, in consideration of the resolution of the display image and the like. If the display size of the display image data is smaller than the reference display size, it is dealt with by expanding the thumbnail image data, minimizing the deterioration of the resolution of the display image, and shortening the processing time. can do.
[0053]
Next, in the present embodiment, when the image displayed on the display unit 17 is enlarged or reduced, the image data to be reduced is selected by the image data comparison unit set in the control unit 11. That is, the control unit 11 sends either the original image data stored in the third memory 22 or the thumbnail image data to the fourth memory 23 to the image enlargement / reduction unit 24 as needed, and The data is reduced. In the present embodiment, the display size of the thumbnail image data is compared with the display size of the display image data displayed on the display unit 17, and the image data to be reduced is selected. When the display size of the display image data is larger than the display size of the original image data, the original image data is enlarged or reduced to cope with the enlarged or reduced display of the image displayed on the display unit 17. .
[0054]
Specifically, as shown in FIG. 7, for example, it is assumed that the vertical size is β and the horizontal size is α for the image size of the display image data displayed on the display screen, and the image size of the thumbnail image data is vertical size. Is y and the horizontal size is x.
[0055]
First, the ratio between the horizontal size α and the vertical size β for the display image data is compared with the ratio between the horizontal size x and the vertical size y for the thumbnail image data (step S41). If α / β ≧ x / y (steps S42, S43, S44) and if α> x (YES in step S42), the original image data is selected and the image The original image data is sent to the reduction unit 24 (Step S43). Then, by reducing the original image data, the display image is enlarged or reduced on the display unit 17. On the other hand, if α ≦ x (NO in step S42), the thumbnail image data is selected, and the thumbnail image data is sent from the fourth memory 23 to the image enlargement / reduction unit 24 (step S44). Then, the thumbnail image data is reduced in size, so that the display image is enlarged or reduced on the display unit 17.
[0056]
On the other hand, if α / β <x / y (steps S45, S46, S47), and if β> y (YES in step S45), the original image data is selected and the image data is stored in the third memory 22. The original image data is sent to the enlargement / reduction unit 24 (step S46). Then, by reducing the original image data, the display image is enlarged or reduced on the display unit 17. On the other hand, if β ≦ y (NO in step S45), the thumbnail image data is selected, and the thumbnail image data is sent from the fourth memory 23 to the image enlargement / reduction unit 24 (step S47). Then, the thumbnail image data is reduced in size, so that the display image is enlarged or reduced on the display unit 17.
[0057]
As described above, in the present embodiment, the image data comparing means of the control unit 11 compares the thumbnail image data with the display size of the display image based on the display size. At this time, the image data comparing means of the control unit 11 makes a determination using thumbnail image data having a small data capacity, thereby greatly reducing the processing speed as compared with the case of using the original image data. can do.
[0058]
In the present embodiment, the case where the image data comparison means of the control unit uses the thumbnail image data as a reference has been described, but it is not necessary to limit to this case. For example, a case where certain reference data is set and the data is used as a reference may be used. Further, in the present embodiment, the case where the image enlargement / reduction display function is used using the image data selection mode has been described, but it is not necessary to limit to this case. This image enlargement / reduction display function can be used for images displayed on the display unit and having at least two types of image display sizes, and the above-described effects can be obtained. In addition, various changes can be made without departing from the spirit of the present invention.
[0059]
【The invention's effect】
As described above, first, in the portable terminal device of the present invention, the original image data obtained via the imaging means or the original image data downloaded from the network is processed into thumbnail image data, and the original image data and the thumbnail image are respectively processed. The image data can be stored in the storage memory. In the portable terminal device according to the present invention, the image displayed on the display unit can be enlarged or reduced. At this time, even when the displayed image is enlarged or reduced, thumbnail image data or original image data is reduced to create enlarged display image data or reduced display image data. Thus, in the portable terminal device of the present invention, when the display image is displayed in an enlarged or reduced manner, the resolution of the image can be prevented from deteriorating and displayed.
[0060]
Second, in the portable terminal device of the present invention, when displaying an image on a display unit in an enlarged or reduced manner, for example, the display size of the display image data and the display of the thumbnail image data are set based on the display size of the thumbnail image data. Compare with size. As a result, the image data comparison means in the control unit can reduce the processing time by preferentially treating the thumbnail image data having a small data capacity.
[Brief description of the drawings]
FIG. 1A is a schematic view of a mobile phone according to an embodiment of the present invention as viewed from the inside (key surface) in an open state, and FIG. 1B is viewed from the outside (back side) in a closed state. FIG.
FIG. 2 is a schematic functional block diagram illustrating an electrical configuration of the mobile phone.
FIG. 3 is a flowchart illustrating a sequence of thumbnail generation by the mobile phone.
FIG. 4 is a schematic diagram illustrating a detailed configuration in an image data storage memory of the mobile phone.
FIG. 5 is a flowchart illustrating an image data selection mode of the mobile phone.
FIG. 6 is a flowchart illustrating a sequence of enlargement processing or reduction processing of image data of the mobile phone.
FIG. 7 is a flowchart illustrating a sequence for comparing display sizes of image data of the mobile phone.
[Explanation of symbols]
1 Mobile phone with camera
2 speakers
3 microphone
4 Second display section
5 Back key
11 Control part
12 Imaging unit
13 Image processing unit
14 First memory
15 Second memory
16 Display driver section
17 Display
18 Key operation section
19 Shutter button
20 Image reading unit
21 Image development unit
22 Third memory
23 4th memory
24 Image enlargement / reduction unit
25 Antenna
26 Radio section
27 Communication control unit
28 Backlight

Claims (6)

Storage means for storing first image data and second image data having different display sizes for the same image data;
A portable terminal device having a display unit for displaying the image data,
Image data comparing means for comparing a display size of third image data displayed on the display means with a display size of one of the first image data and the second image data; And displaying image data size conversion display means for enlarging or reducing the first image data or the second image data when displaying the converted image data in which the third image data is displayed enlarged or reduced. A mobile terminal device characterized by the above-mentioned. 2. The portable terminal according to claim 1, wherein the first image data has a larger display size than the second image data, and the image data comparing means uses the second image data. machine. When the display size of the converted image data is equal to or smaller than the display size of the first image data, the image data size conversion display means displays one of the first image data and the second image data. The mobile terminal device according to claim 1, wherein a reduction process is performed. When the display size of the converted image data is equal to or smaller than the display size of the second image data, the image data size conversion display means reduces the size of the second image data. 4. The mobile terminal device according to 3. The portable terminal device according to claim 1, further comprising an imaging unit, wherein the image data is acquired via the imaging unit. The portable terminal device according to any one of claims 1 to 5, wherein the first image data is original image data, and the second image data is thumbnail image data.

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