JP2727619B2 - Image display device and display control method thereof - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device and a display control method thereof, and more particularly, to an image display device in which a page turning speed is automatically switched according to the content (complexity or the like) of a display image. The present invention relates to a display device and a display control method thereof.

[Conventional technology]

The speed of automatic page turning in image display may not be too fast or too slow, and the speed at which the displayed document can be visually confirmed is good.

In actuality, since the confirmation time varies depending on the contents of the document, it has been conventionally considered that the page turning speed can be switched to several speeds (for example, the Ricoh optical filing system 6000 series operation) Refer to the instruction manual (89 'January).

When searching for data, a method has been proposed in which special data for search is separately prepared without using an actual image, and a high-speed search is performed using the special data. However, the data recording medium requires an area for recording the above-mentioned special data for search, and there is a problem that the effective recording capacity of the recording medium is reduced.

[Problems to be solved by the invention]

In the above-mentioned prior art, although the operator can switch the speed to his or her favorite speed, there is a problem that the user does not know the contents of the document before actually viewing it, and thus does not know the time to check the document. For this reason, the operator may need to perform operations such as returning to the beginning and redisplaying after a few pages,
The operation was also inefficient.

The present invention has been made in view of the above circumstances, and an object thereof is to solve the above-described problems in the conventional technology and to reduce the effective recording capacity of a recording medium without reducing the effective recording capacity of a recording medium. Another object of the present invention is to provide an image display device and a display control method for automatically switching the page removal speed.

[Means for solving the problem]

In order to achieve the above object, an image display device according to the present invention includes a page buffer for expanding image data read from image data holding means, a display means for displaying an image read from the page buffer, and a display image. Control means for controlling the page turning speed of the image display device, wherein the control means, when a page turning instruction to the next page or the previous page is issued, data of the image being displayed in the page buffer The image display of the next page or the previous page is performed at a speed depending on the amount or the data amount of the image being displayed in the page buffer and the data mode attached to each page.

The display control method in the image display device according to the present invention is directed to an image display device including a page buffer for expanding the image data read from the image data holding unit, and a display unit that displays the image read from the page buffer. In the display control method, when an instruction to turn a page to the next page or the previous page is issued, the data amount of the image being displayed in the page buffer, or the data amount and the data mode assigned to each page are changed. A predetermined image display time is calculated based on the calculation result, and the image of the next page or the previous page is displayed based on the calculation result.

[Action]

In the image display device and the display control method according to the present invention, when switching the page turning speed according to the content of the display image, the time required for confirming the display document is determined by changing the content of the display image to the complexity of the image, that is, the image data. The page turning speed (display time) is automatically adjusted / changed depending on the amount of image data (basically, it is slow when the data amount is large, and quickly when the data amount is small) as proportional to the data amount. Is what you do.

Further, in addition to the amount of image data, information indicating a data mode such as a multi-level mode or a binary mode attached to each page is detected, and control is performed so that the calculation result is adjusted according to the data mode. This enables more precise control of the page turning speed (display time).

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram of an image processing apparatus showing one embodiment of the present invention. In the figure, 1 is a keyboard controller for controlling a keyboard 2, 3 is a CRT display 4
Controller that controls the optical disk, 5 is an optical disk controller that controls the optical disk 6, and 7 is a CP that controls the entire system.
U and 8 are image control modules that perform page turning control, which are characteristic parts of the apparatus of the present embodiment, 9 is a page buffer controller that controls a page buffer 10, 11
Indicates a display buffer. Each of the above components is a bus
Connected by 12.

FIG. 3 is a diagram showing a functional configuration of the apparatus of the embodiment, which means that an image reading unit 22 reads image data from an optical disk based on an instruction of an image display instruction unit 21 and adjusts a processing speed. The unit 23 analyzes the image data to determine a page turning speed, and based on this information, the image display unit 24 performs image display at a predetermined page turning speed.

The operation of the present embodiment configured as described above will be described in detail below.

FIG. 1 is an operation flowchart for explaining the operation of this embodiment. When the operator instructs automatic page turning or automatic previous page turning (step 31), image automatic page turning is activated. After startup,
If a stop instruction is given from the keyboard 2 (step 32), the operation is terminated as shown in steps 33 and 34.

Otherwise, first, the current time (= T ₁ ) is stored (step 35). Next, the capacity of the currently displayed image data is stored from the data in the page buffer 10 (= Y, step 36). When there is no previous display image, Y = 0.

Next, next page reading or previous page reading is performed depending on whether the first specification is automatic next page turning or previous page turning (steps 37 to 39). Then, from the capacity Y of the currently displayed image data, the page speed is calculated, for example, in step 40 by the following equation.

Here, HY: Standard document image data capacity HS: Standard document page turning speed Y: The above-mentioned image data capacity S: Page turning speed for Y The standard document page turning speed HS is, for example, when the device reads data. Machine processing time required for displaying on CRT4 + 1 second. Note that the above equation (1) calculates the A4 original as 30
This example is applied when storing at 0dpi density and M ² R compression. After obtaining the page removal speed S, the current time (= T ₂ ) is stored (step 41), and before and after this, the image data read into the page buffer 10 is set in the display buffer 11. (step 42) every processing time up to this point (T ₂ -T ₁₎ (in fact, the time of page turning interval) page turning speed S is compared with the (step
43).

The effect of this comparison, and only display wait display latency = S- larger the direction of page turning speed S (T ₂ -T ₁₎ (step 44), an image is displayed at step 45. Hereinafter, specific examples will be described.

<Example> HY = 500K bytes, machine processing time = 1sec (HS = 1sec + 1sec = 2sec), if Y = 1,000K bytes If Y = 750 bytes If Y = 250K bytes If Y = 100K bytes Becomes

In the above embodiment, an example was described in which attention was paid only to the capacity of image data. However, in the following embodiments, in addition to the capacity of image data, the mode of the image data, An example is shown in which a mode image or a binary mode image such as a character image is taken into consideration. this is,
In the case of a multi-valued mode image such as a photographic image, it is easy to visually determine, whereas in the case of a binary mode image such as a character image, it is difficult to visually determine and it takes time. Things.

As for the mode of the image data, for example, as shown in FIG. 4, a flag or the like such as "1" or "0" may be set in the header portion at the head of the data format.

In the present embodiment, a flag indicating the mode of the image data is read at the same time as or after the storage of the capacity of the image data in step 36, and the page in step 40 of the flowchart shown in FIG. The equation used for calculating the turning speed S is the above-described equation (1) or another equation, for example, the following equation (2) Here, α: a conversion coefficient. Further, after performing the calculation according to the above equation (1), a step of multiplying by a conversion coefficient may be provided, and various methods can be applied.

According to each of the above embodiments, an image display apparatus and a display control method for automatically switching the page turning speed, such as slow when the data amount is large and fast when the data amount is small, according to the complexity of the display image and the like There is an effect that can be realized.

It should be noted that the above embodiment is shown as an example, and the present invention should not be limited to this.

〔The invention's effect〕

As described in detail above, according to the present invention, there is a remarkable effect that an image display device and a display control method for automatically switching a page turning speed according to the content of a display image can be realized. .

[Brief description of the drawings]

FIG. 1 is an operation flowchart for explaining the operation of an image processing apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of the image processing apparatus of the embodiment, and FIG. FIG. 4 is a diagram showing a format in which the mode of image data is set as a flag or the like. 2: Keyboard, 4: CRT, 5: Optical disk, 7: CPU, 8: Image control module, 10: Page buffer, 11: Display buffer, 21: Image display instruction unit, 22: Image reading unit, 23: Processing speed adjustment Unit, 24: image display unit, 31 to 45: processing step.

Claims (5)

(57) [Claims] 1. A page buffer for expanding image data read from image data holding means, display means for displaying an image read from the page buffer, and control means for controlling a page turning speed of the display image. An image display device comprising: the control means, when a page turning instruction to a next page or a previous page is issued, at a speed depending on a data amount of a currently displayed image in the page buffer, An image display device for displaying an image. 2. A page buffer for expanding image data read from image data holding means, display means for displaying an image read from the page buffer, and control means for controlling a page turning speed of the display image. An image display device comprising: the control unit, when an instruction to turn a page to a next page or a previous page is issued, sets a data mode of a currently displayed image in the page buffer and a data mode assigned to each page. An image display device for displaying an image of a next page or a previous page at a dependent speed. 3. A display control method in an image display device having a page buffer for expanding image data read from image data holding means and a display means for displaying an image read from the page buffer, comprising: Or, when there is a page turning instruction to the previous page, the data amount of the currently displayed image in the page buffer is detected, a predetermined image display time is calculated based on the detected data amount, and based on the calculation result, A display control method in an image display device, wherein an image of a next page or a previous page is displayed. 4. A display control method in an image display device having a page buffer for expanding image data read from image data holding means and a display means for displaying an image read from the page buffer, comprising: Alternatively, when there is a page turning instruction to the previous page, the information indicating the data amount of the image being displayed in the page buffer and the data mode attached to each page is detected, and based on the data amount and the data mode. A display control method for an image display device, wherein an image of a next page or a previous page is displayed. 5. The display control method for an image display device according to claim 4, wherein a data amount of a currently displayed image in said page buffer is detected when an instruction to turn a page to a next page or a previous page is issued. Then, a predetermined image display time is calculated based on the detected data amount, an adjustment predetermined by the data mode is performed on the calculation result, and an image of the next page or the previous page is displayed based on the adjustment result. A display control method in an image display device, characterized in that: