JPH10174052A - Thumbnail display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To instantly obtain both information of picture and relative size on pictures having various sizes by determining a reduction factor with respect to original picture data having different sizes based on a difference between the maximum size and the minimum size and relatively grasping the picture size of a reduced image in addition to its pattern. SOLUTION: First, the original picture data is retrieved, and a figure (a) being the minimum original data and a figure (b) being the maximum original data are extracted therefrom. These extracted minimum original picture data figure (a) and maximum original picture data figure (b) are compared, and its size differs in twice or more than twice, it is decided that the original picture data are compressed by a prescribed logarithm factor. Then, all the original picture data retrieved at first is reductively displayed in accordance with the logarithm factor or a compression factor determined by a one-dimensional factor, and as a result, figures a' to d' are obtained. Then, in the case where the difference of the size between the maximum picture data and the minimum picture data is equal to below twice, its magnification can be set unlimitedly.

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 more particularly to a thumbnail display device capable of displaying images of various sizes in a manner that makes it easy to grasp the design and size.

[0002]

2. Description of the Related Art In a conventional thumbnail display device, each image is reduced to a fixed magnification or a fixed size. In addition,
An image reproducing apparatus having a thumbnail function for searching for an image stored in a storage medium records individual original (original) image data or its compressed data in a storage device, and stores the compressed data or the previously created compressed data. The thumbnail playback function is realized by using predetermined thumbnail data set, and the thumbnail playback function is for referring to the contents of the original image data stored in the storage medium.
A conventional image reproducing apparatus having the thumbnail function is disclosed in, for example, JP-A-8-195927 and JP-A-7-195927.
Reference is made to the description in JP-A-200635.

[0003]

However, in the conventional method described above, the difference between the minimum-size image and the maximum-size image is extremely different in fixed-magnification reduction display, and the pattern of the small image cannot be discriminated. Have a point.

Further, in the conventional method, since the size of the original image cannot be determined by reducing the fixed size, all the image data of the same design but of different sizes are displayed in the same manner, and the target image data cannot be grasped. is there.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-described problems, and has as its object to display images of various sizes so that both information of a design and a relative image size can be obtained instantaneously. It is an object of the present invention to provide a display device capable of doing this.

[0006]

In order to achieve the above object, a thumbnail display device according to the present invention determines a reduction coefficient based on a difference between a maximum size and a minimum size for a plurality of different sizes of original image data, and performs image reduction. Images can be grasped not only by design but also by relative image size.
It is characterized by the following.

Further, according to the present invention, the maximum size original image data and the minimum size original image data are extracted from a plurality of different size original image data, and the difference between the maximum size and the minimum size is equal to or more than a predetermined value. In the case of, the compression coefficient is determined by the logarithm of the size, and the plurality of original image data having different sizes are reduced and displayed based on the compression coefficient.

According to the present invention having the above-described structure, the logarithm is used for the compression ratio at the time of image compression in accordance with the difference between the maximum and minimum sizes, so that not only the pattern but also the size can be easily changed. It is something that can be grasped.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a flowchart for explaining a processing flow according to the embodiment of the present invention.

Referring to FIG. 1, an original image to be displayed as a thumbnail is searched (step 101), and the largest image data and the smallest image data are extracted from the searched image data (step 102).

Next, the difference between the maximum size and the minimum size extracted in step 102 is compared and determined (step 10).
3) If the difference is equal to or more than a predetermined value, the difference is reduced using a logarithm as a coefficient (step 104).

On the other hand, if it is determined in step 103 that the difference between the maximum size and the minimum size is smaller than a predetermined value, the size is reduced using a one-dimensional coefficient (step 1).
05).

Using the coefficients obtained in step 104 or step 105, all target images are reduced by the same compression coefficient, and thumbnail images are created and displayed (step 106).

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to explain the above-mentioned embodiment of the present invention in more detail, an embodiment of the present invention will be described below with reference to FIGS.

FIGS. 2A to 2D show original image data to be displayed as thumbnails, the sizes of which are 100 pixels × 100 pixels and 1000 pixels ×
1000 pixels, 300 pixels x 200 pixels,
It is 500 pixels x 700 pixels.

In step 101 of FIG. 1, first, FIG.
2 (a), FIG. 2 (b), FIG. 2 (c), and FIG. 2 (d) are searched, and in step 102, the minimum original data shown in FIG. Pixel × 100 pixels) and the largest original data, FIG.
(B) Extract (1000 pixels × 1000 pixels).

Next, in step 103, FIG. 2A, which is the minimum original image data, is compared with FIG. 2B, which is the maximum original image data, and the size is doubled. If they differ, the process proceeds to step 104, and if not, the process proceeds to step 105 to display the thumbnails in a size proportional to the size of the original image data (steps 104 to 106).

In the embodiment of the present invention, the difference between FIG. 2A and FIG.
The process proceeds to step S5, where it is determined that the original image data is to be compressed by a predetermined coefficient (logarithmic coefficient), for example, the following equation (1).

Size of reduced image = 1 log ₁₀ (size of original image data) (1)

Next, at step 106, step 10 has already been performed.
4 (logarithmic coefficient) or in accordance with the compression coefficient determined in step 105 (one-dimensional coefficient), all the original image data retrieved in step 101 are reduced and displayed, and as a result, as shown in FIGS. b ′), FIG. 2 (c ′), FIG.
(D ') is obtained.

Here, when the difference between the size of the maximum image data and the size of the minimum image data is less than or equal to two times, compression display is performed as in the conventional method. However, depending on the resolution and size of the display and the demands of the user, , This is 1.5
It is also possible to change it to 2 times, 3 times, etc.
Can be set without any restrictions.

Further, the coefficient to be logarithmically compressed is 1o
g ₁₀ () not only, 1og ₂₀ (), it can be any factor such 1og ₅ ().

[0023]

As described above, according to the present invention,
By using not only a fixed value but also a logarithm for the reduction ratio, there is an effect that not only the design but also the difference in size can be easily grasped.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a processing flow according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining an embodiment of the present invention.
(A) is an original image (minimum image: 100 pixels × 100 pixels), (b) is an original image (maximum image: 1000 pixels × 1000 pixels), (c) is an original image (300 pixels × 200 pixels), (d) ) Is the original image (500 pixels × 700 pixels), and (a ′) is the reduced image (100 pixels).
Pixel × 100 pixels), (b ′) is a reduced image (1
(C ') shows a reduced image (124 pixels x 115 pixels), and (d') shows a reduced image (135 pixels x 142 pixels).

[Explanation of symbols]

 101 Image Retrieval 102 Min / Max Image Extraction 103 Min / Max Image Comparison 104 Logarithmic Coefficient 105 One-Dimensional Coefficient 106 Reduced Image Creation of Full Screen

Claims (2)

[Claims] A reduced coefficient is determined on the basis of a difference between a maximum size and a minimum size for a plurality of original image data of different sizes, so that the reduced image can be grasped not only with the design but also with the relative image size. Characteristic thumbnail display device. 2. A method according to claim 1, wherein a maximum size original image data and a minimum size original image data are extracted from a plurality of different size original image data, and a difference between the maximum size and the minimum size is equal to or greater than a predetermined value. Wherein a compression coefficient is determined by a logarithm of the size, and the plurality of original image data having different sizes are reduced and displayed based on the compression coefficient.