JP2001282210A - Image display device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device and method capable of displaying images indicating the image data arranged in the order corresponding to a second image display system by an image display means for displaying the images by the first image display system. SOLUTION: Whether the image is an interlace form or not is decided in an image discrimination block 104. An image file is delivered to an expansion CORE 106 and when the image is decided to be the interlace form, the odd and even fields of the image file are expanded. A line control block 112 controls the image data of the expanded odd and even fields so as to store the same alternately by each of section lines into a memory 108 for display. The image data stored in the memory 108 for display is transmitted across a video encoder 110 to a video output terminal 114. The image data is displayed on a display connected video output terminal 114.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device and an image display method, and more particularly, to an image display device and an image display method for displaying an image according to a type of an image to be displayed.

[0002]

2. Description of the Related Art The image form used in personal computers, digital cameras and the like is usually a progressive image. Images created by these devices are created as progressive images,
It is compressed and stored in the G form. When displaying the compressed and stored progressive image on the display device, the compressed and stored progressive image is read, expanded and displayed.

Here, data acquisition, storage, and display of a progressive image will be described with reference to FIGS. 5A to 5C.

FIG. 5A shows a photographing target (or original image).
Assuming that the scanning lines (horizontal pixel lines) of the original image shown in FIG. 5A are p1, p2, p3,..., P20 from the top, the image data in the image file acquired in the progressive mode is as shown in FIG. They are arranged as shown in FIG. That is, the order of the scanning lines does not change. FIG. 5C shows the result of displaying the progressive image on the screen. That is, the images are displayed in the order of the image data arranged in the image file of FIG. This method has the disadvantage that the display screen flickers when the display speed or the like is low, but the file configuration is simplified.

The acquisition, storage, and display of interlaced image data will be described with reference to FIGS.

FIG. 5E shows a photographing target (or original image).
If the scanning lines (horizontal pixel lines) of the original image shown in FIG. 5 (E) are i1, i2, i3,..., I20 from the top, the image acquired in the interlaced form is shown in FIG. Becomes That is, scanning lines are alternately acquired, and one frame is composed of odd fields composed of i1, i3, i5,..., I19 and even fields composed of i2, i4, i6,.

FIG. 5G shows a result of displaying an interlaced image on a screen. By acquiring the image data of the scanning lines alternately from the odd field and the even field, the original image shown in FIG. 5E is displayed.

[0008]

However, when the image file acquired in the progressive form, FIG. 5B, is displayed on a display device for displaying the image file acquired in the interlace form, FIG. It becomes as shown in. That is, the images are displayed in the order of p1, p11, p2, p12,..., P10, p20, and an image different from the original image shown in FIG.

[0009] Further, when the image file acquired in the interlaced form, FIG. 5 (F), is displayed on a display device for displaying the image file acquired in the progressive form,
The result is as shown in FIG. That is, i1, i3,…, i19, i2, i
4,..., I20, and an image different from the original image shown in FIG. 5E is displayed.

However, a video signal obtained by a digital video camera or the like is an interlaced image. The interlaced image corresponds to the motion operation in the JPEG encoding system, and has many advantages such as an improvement in processing speed, a reduction in the amount of memory, and a reduction in the load on CPU processing. Therefore, it is desirable that the image display device can display both a progressive image and an interlaced image.

When storing an interlaced image, it is also possible to convert it into a progressive image. However, there are disadvantages such as the necessity of processing for conversion and the necessity of a memory for storing both the interlaced image and the progressive image. If both images are not saved, a re-conversion process is required to restore the original image. A similar problem arises when converting a progressive image into an interlaced image.

[0012] The present invention has been made in view of the above-mentioned facts, and is an image display means for displaying an image in a first image display system, the image data being arranged in an order corresponding to the second image display system. It is an object to provide an image display device and method capable of displaying an image shown.

[0013]

In order to achieve the above object, the present invention provides an image display means for displaying an image by a first image display method and a second image display means different from the first image display method.
Image file acquiring means for acquiring an image file in which image data is arranged in an order corresponding to the image display method; and an image indicated by the image data of the image file acquired by the image file acquiring means, the image display means And control means for controlling the display to be performed by the image display device.

The image display means displays an image in a first image display mode. The image file acquisition means acquires an image file in which image data is arranged in an order corresponding to a second image display method different from the first image display method.
Then, the control unit controls the image indicated by the image data of the image file acquired by the image file acquisition unit to be displayed by the image display unit.

[0015] The image file acquiring means may include a first image file in which image data is arranged in an order corresponding to the first image display system, and an image data in an order corresponding to the second image display system. And the arranged second image file can be obtained, and it is determined whether the image file obtained by the image file obtaining means is a first image file or a second image file. A determining unit configured to determine whether the image file acquired by the image file acquiring unit is a second image file; Control may be performed so that the image indicated by the image data is displayed by the image display means.

[0016] The image processing apparatus further includes storage means for storing image data, wherein the control means stores the image data in the second image file acquired by the image file acquisition means.
In the order corresponding to the first image display method, control is performed such that the image data is stored in the storage means, and the image indicated by the image data stored in the storage means is displayed on the image display means. It may be controlled.

Further, the control means controls the image file obtaining means so as to obtain image data from the image file in an order corresponding to the first image display method, so that the image is Control may be performed so as to be displayed on the image display means.

[0018] The first image display method may be a progressive image display method, and the second image display method may be an interlaced image display method.

As described above, the image display means for displaying an image in the first image display mode displays the image file in which the image data is arranged in the order corresponding to the second image display mode, thereby obtaining the image file. The image can be displayed without changing the image display device by the image file.

The present invention further provides an image display method for displaying an image in a first image display method, wherein the image data is displayed in an order corresponding to a second image display method different from the first image display method. An image display method is provided in which an image file in which is arranged is obtained, and an image indicated by the obtained image data of the image file is controlled to be displayed by the image display means.

As described above, in the image display method for displaying an image in the first image display method, the image file in which the image data is arranged in the order corresponding to the second image display method is displayed, thereby obtaining the image file. The image can be displayed without changing the image display method depending on the image file.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings. [Hardware Configuration] FIG. 1 shows an example of a block configuration diagram of an image display device according to the present embodiment. Solid arrows indicate the transmission of information, and dashed arrows indicate the direction of control. A storage device 102, an image determination block 104 as a determination unit, a decompression CORE 106, a display memory 108 as a storage unit, a video encoder 110 as an image display unit, and a video output terminal 114 are connected in series. A display device (not shown) is connected to the video output terminal 114 for display. The line control block 112 as a control unit controls the storage method of the image in the display memory 108 according to the type of the image determined by the image determination block 104.

The image file obtaining means is a storage device 102
And a portion corresponding to a magnetic head when the storage device 102 is a hard disk. [Operation of the present apparatus] First, the operation when an image is stored in the storage device 102 of the image display apparatus according to the present embodiment will be described with reference to the flowchart shown in FIG.

In step 204 of FIG. 2, image data is obtained by photographing the object to be photographed. In step 206, the process branches depending on the equipment used at the time of shooting. In step 204, if the equipment used for shooting is a digital video camera,
If it is based on the device that forms the interlaced image file, the process proceeds to step 208. In step 208, the compression of odd fields in one frame of the image file is performed in the JPEG format. continue,
In step 210, compression of the even field in one frame of the image file is performed in the JPEG format. In step 212, the odd field and the even field are made into one file (FIG. 5F), and a flag code indicating that the image is an interlaced image is added. In step 216, an image file in an interlaced format that is compressed for each field, filed, and added with a flag code is stored in the storage device 102.

If it is determined in step 204 that the device used for photographing is a device such as a digital camera that forms a progressive image file, the process proceeds to step 214. In step 214, the image file is compressed in the JPEG format while keeping one frame. In step 216, the progressive image file compressed as a frame is stored in the storage device 102.

Next, the operation when an image is displayed by the image display device according to the present embodiment will be described with reference to the flowchart shown in FIG.

In step 304, the storage device 102
The image file is read from. In step 306, the image determination block 104 determines whether or not a flag code indicating that the image is in an interlaced form is added to the image. If it is determined that a flag code has been added to the image, the process proceeds to step 308.

In step 308, the image file is sent to the decompression CORE 106, and the odd fields of the interlaced image file are decompressed. Step 3
At 10, the even field is expanded.

In step 312, step 306
Is transmitted to the line control block 112, the expanded image data of the even field and the odd field are alternately stored in the display memory 108 for each scanning line.
Is stored.

That is, as shown in FIG.
Assuming that the image is composed of the scanning lines m1, m2, m3,..., M20, the image data in the image file in the interlaced form has the scanning lines m as shown in FIG.
1, m3, m5, ..., m19, m2, m4, m6, ..., m20. Under the control of the line control block 112, image data is stored in the display memory 108 such that the scanning lines are in the order of m1, m2, m3,..., M20, as shown in FIG. Thus, by storing the image data in the display memory, it becomes possible to display the interlaced image file as well as the progressive image file.

In step 318, the display memory 1
08 stored in the video encoder 110
To the video output terminal 114 via the. The image data is displayed on a display device connected to the video output terminal 114.

If it is determined in step 306 that no flag code has been added to the image file and that the image file is in the progressive format, the image file is decompressed in step 314. In step 306,
Since the signal that determines that the image file is in the progressive format is transmitted to the line control block 112, the image file is stored in the display memory 108 in the order of the scanning lines.

That is, as shown in FIG.
Assuming that the image is constituted by the scanning lines m1, m2, m3,..., M20, the image data in the progressive image file has the scanning lines as shown in FIG.
They are arranged in the order of m1, m2, m3,..., m20.
Under the control of the line control block 112, image data is stored in the display memory 108 such that the scanning lines are in the order of m1, m2, m3,..., M20, as shown in FIG.

At step 318, the display memory 1
08 is stored in the video encoder 11
0, output via the video output terminal 114 and displayed on a display device connected to the video output terminal.

In the above description, the image compression format is JPEG
However, other compression modes may be used.

As described above, the type of the image file is determined in the image determination block 104, and the line control block 112 controls the storage order of the image data in the display memory 108 based on the determination result. An image file in an interlaced form can be displayed using an image display device for displaying a file.

Therefore, it is possible to display both progressive image files and interlaced image files stored in a removable storage device, for example, a memory card. It can also be used when both types of files are mixed on a hard disk or the like.

In the above description, the image file in the interlaced form is temporarily stored in the display memory 108 under the control of the line control block 112. However, the present invention is not limited to this. The reading order may be controlled so as to be directly output to the video encoder 110 in the same order as the progressive image file.

The present apparatus is an image display apparatus for displaying an image in a progressive form as a standard. However, when the present apparatus displays an interlaced image, the line control block 11
According to 2, the order in which the image data of the progressive image is stored in the display memory 108 may be controlled according to the format of the interlaced image.

[0040]

As described above, the present invention provides an image display device capable of displaying an image of an image file in a format that does not correspond to an image display method by controlling the order of image data. Provide an image display method.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an image display device according to the present embodiment.

FIG. 2 is a flowchart illustrating a storage process according to the embodiment;

FIG. 3 is a flowchart illustrating a display process according to the embodiment.

FIG. 4 is a diagram showing an example of arrangement of image data in a display memory.

FIG. 5 is a diagram illustrating an example of a conventional technique relating to storage and display of a progressive image and an interlaced image.

[Explanation of symbols]

 102 storage device 104 image discrimination block 106 decompression CORE 108 display memory 112 line control block

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 5/93

Claims (9)

[Claims] 1. An image display means for displaying an image in a first image display method, and an image file in which image data is arranged in an order corresponding to a second image display method different from the first image display method An image display device comprising: an image file obtaining unit that obtains an image; and a control unit that controls an image that is indicated by the image data of the image file obtained by the image file obtaining unit to be displayed by the image display unit. . 2. The image file acquiring unit according to claim 1, wherein
A first image file in which the image data is arranged in the order corresponding to the image display method of the first and a second image file in which the image data is arranged in the order corresponding to the second image display method can be obtained The image file acquired by the image file acquisition means, further comprising a determination means for determining whether the first image file or the second image file, the control means, the control means, When the image file obtained by the image file obtaining unit is determined to be a second image file by the determining unit, an image indicated by the image data of the second image file is displayed by the image display unit. The image display device according to claim 1, wherein the image display device is controlled to perform the control as described above. 3. A storage unit for storing image data, wherein the control unit converts the image data in the second image file acquired by the image file acquisition unit into the first image display format. The control is performed so as to store the image data in the storage unit in a corresponding order, and the image indicated by the image data stored in the storage unit is controlled to be displayed by the image display unit. The image display device according to claim 1 or 2. 4. The image processing apparatus according to claim 1, wherein the control unit controls the image file obtaining unit to obtain image data from the image file in an order corresponding to the first image display method. The image display device according to claim 1, wherein the image display device is controlled to be displayed by an image display unit. 5. The image processing method according to claim 1, wherein the first image display method is a progressive image display method, and the second image display method is an interlaced image display method.
The image display device according to claim 4. 6. An image display method for displaying an image in a first image display method, wherein the image data is arranged in an order corresponding to a second image display method different from the first image display method. An image display method for acquiring an image file and controlling the image represented by the acquired image data of the image file to be displayed by an image display unit that displays the image in a first image display mode. 7. A first image file in which image data is arranged in an order corresponding to the first image display method, and a second image file in which image data is arranged in an order corresponding to the second image display method. And determining whether the obtained image file is a first image file or a second image file, and determining whether the obtained image file is a second image file. 7. The image display according to claim 6, wherein when it is determined that the image file is an image file, an image indicated by the image data of the second image file is controlled to be displayed by the image display means. Method. And controlling the image data in the acquired second image file in a storage unit in an order corresponding to the first image display method. The image display method according to claim 6, wherein control is performed so that an image to be displayed is displayed by the image display means. 9. The method according to claim 1, wherein image data is acquired from the image file in an order corresponding to the first image display method, and control is performed so that the image is displayed by the image display means. The image display method according to claim 6 or 7.