JP2000098994A - Display screen design device and display screen change device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To objectively decide the readability of character. SOLUTION: A CPU 11 inputs the character size and chromaticity difference of a display picture including character through an input interface 14. The degree of the readability of the character is stored beforehand in a ROM 12 related to the character size and the chromaticity difference as a map, and the CPU 11 decides the degree of the readability of the character from the inputted character size and chromaticity difference referring to a ROM 12 to output the decision result through an output interface 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display screen designing apparatus for determining the readability of characters and a display screen changing apparatus for changing a character display based on the readability determination.

[0002]

2. Description of the Related Art In recent years, various types of monitor devices have been used as information terminals, and characters displayed on such monitor devices need to be displayed in a manner that is most easily seen by a viewer. Therefore, for example, Japanese Patent Application Laid-Open No. 3-239290 proposes an image drawing apparatus in which a character size and a luminance contrast of a character on a monitor screen can be appropriately selected by switches.

[0003]

However, the apparatus described in the above publication has a problem that the legibility of characters is determined sensuously solely by the subjectiveness of the viewer, and no objective judgment is made. In addition, there is also a problem that it takes time to adjust because the character size and the brightness contrast are manually adjusted.

Accordingly, the present invention has been made to solve such a problem, and has provided a display screen designing apparatus and a display screen changing apparatus capable of objectively determining the readability of characters and automatically displaying easily read characters. The purpose is to provide.

[0005]

In order to achieve the above object, in the display screen designing apparatus of the first invention, input means (14, step 103) for inputting a character size and a chromaticity difference of a display screen including characters. And the storage means (12) storing the degree of readability of the character in association with the character size and the chromaticity difference, and the input character size and chromaticity difference with reference to the storage means (12). A determination means (11, step 104) for determining the degree of readability of the character and an output means (15, step 105) for outputting a determination result by the determination means are provided.

In the first invention, the degree of readability of the character is stored in advance in the storage means in association with the character size and the chromaticity difference, and the character on the display screen is referred to by referring to this storage means. Can be objectively determined. Here, the chromaticity difference is a difference between the chromaticity of the background color on the display screen and the chromaticity of the character color.

In the display screen changing apparatus according to the second aspect of the present invention, the input means (24, step 203) for inputting the character size and the chromaticity difference of the display screen including the character, and the degree of readability of the character are determined by the character size. Storage means (22) pre-stored in association with the chromaticity difference, and the storage means (22) to determine the degree of legibility of the character from the input character size and chromaticity difference Means (21, step 20)
4) and output means (2) for changing at least one of the character size and the chromaticity difference based on the result of the determination by the determining means and outputting the changed character size and / or chromaticity difference.
5, step 205, step 206).

In the second aspect of the invention, the degree of readability of the character is determined by referring to storage means which stores the degree of readability of the character in advance in association with the character size and the chromaticity difference, and
By changing at least one of the character size and the chromaticity difference based on the determination result, easily readable characters can be automatically displayed.

In the first and second inventions, the degree of readability of the character stored in the storage means (12, 22) is associated with the character size and the chromaticity difference based on visual characteristics. it can. According to this, the degree of readability can be determined more objectively.

[0010] The visual characteristics may be visual spatial frequency characteristics. According to this, the degree of readability of the character can be quantitatively expressed, and the readability of the character can be easily determined.

Note that the reference numerals in parentheses indicate the correspondence with specific means described in the embodiments described later.

[0012]

(First Embodiment) FIG. 1 shows an example of a device configuration of a display screen designing apparatus 1 which can be used for designing a monitor display screen and the like. The apparatus 1 is based on a personal computer, and includes an arithmetic unit (CPU) 11, a read-only memory (ROM) 12 for storing a processing program and a determination map described later, and a random access memory (RAM) 13 as a work area. Have. Information such as a character size, a chromaticity difference, and viewing conditions from a monitor display screen design device (not shown) is input to the input interface 14, and a determination result is output from the output interface 15.

FIG. 2 is a graph showing an example of the determination map stored in the ROM 12. When the viewing conditions such as the age of the viewer and the viewing environment are fixed, the readability of the character changes as shown in FIG. 2 depending on the character size and the chromaticity difference. This is based on the spatial frequency characteristics of the characteristics of the human eye (visual characteristics). For example, when showing a striped pattern to a person, the difference in brightness and color (chromaticity difference)
Is smaller, or the finer the stripe pattern (the higher the spatial frequency), the more difficult it is to see. If this is replaced with a character display, it means that the smaller the chromaticity difference between the character and the background, or the smaller the character size (the higher the spatial frequency), the more difficult the character is to read. Conversely, in order to make it easier to read, it is necessary to increase at least one of the chromaticity difference and the character size. The specific numerical values in the graph of FIG. 2 are obtained by creating a striped pattern with various chromaticities and spatial frequencies (character sizes), determining whether or not the subject can recognize the striped pattern, and determining the spatial frequency for each chromaticity difference. Obtained experimentally by determining characteristics.

In FIG. 2, A is a readable area, B is a somewhat readable area, C is a readable area, and D is a illegible area. In addition, when the age of the viewer changes in the viewing conditions, the easy-to-read area on the determination map changes accordingly as shown in FIG. 3, and when the viewing environment changes in the viewing conditions, The easy-to-read area on the determination map changes as shown in FIG.

Therefore, as shown in FIG. 5, the CPU first takes in viewing conditions such as the age of the viewer and the viewing environment (step 101), and corrects the determination map of FIG. 2 accordingly (step 102). ). Thereafter, information on the character size and the chromaticity difference is fetched (step 103), and the point P on the determination map corresponding to these is determined by which of the areas A to D in FIG. 2 (step 104). The readability of the character is determined, and the result of this determination is output (step 105). From this determination result, it is possible to know whether or not the design value for the monitor screen display is good.

(Second Embodiment) FIG. 6 shows an example in which the present invention is realized as a display screen changing device 2 of a navigation device 3. In the figure, information on the character size and the chromaticity difference is input to the display screen changing device 2 from the navigation device 3 to which the monitor 31 is connected. Further, conditions such as age and viewing environment are input from the viewing condition setting device 4.

The internal configuration of the display screen changing device 2 is the same as that of the display screen designing device 1 in the first embodiment,
21, an ROM 22, a RAM 23, an input interface 24, and an output interface 25. FIG. 7 shows a processing procedure of the CPU 21 in the present embodiment. FIG.
Steps 201 to 203 correspond to steps 101 to 103 in FIG. 5 in the first embodiment. Then, as a result of referring to the determination map in step 204, for example, if it is determined that the point P1 (FIG. 8) on the determination map corresponding to the current character size and chromaticity difference is outside the easy-to-read area A, Changes the character size in the subsequent step 205, and moves point P1 to point P2 in the easy-to-read area as shown in FIG. Then, the changed character size is output to the navigation device 3 via the output interface 25 (FIG. 6) (step 206). As a result, the place name characters and the like on the map displayed on the monitor 31 are automatically changed to a readable size.

(Third Embodiment) In the second embodiment, the monitor screen is made easier to read by changing the character size. However, when the judgment map is referred to in step 204 in FIG. As described above, when it is determined that the point P3 on the determination map corresponding to the character size and the chromaticity difference at this time is outside the legible area A, the chromaticity difference is changed instead of the character size. Moves the point P3 to the point P4 in the easy-to-read area. Then, the chromaticity difference after the change is output to the navigation device 3 (FIG. 6). The navigation device 3 changes at least one of the character color and the background color from the output chromaticity difference and displays the changed color on the monitor 31. By doing so, the place name characters and the like on the map displayed on the monitor 31 are automatically changed to the easy-to-read chromaticity difference.

(Fourth Embodiment) The character size and the chromaticity difference are not completely unrelated, and based on a rule of thumb, they often have a certain relationship from a design standpoint. For example, FIG.
The relationship is as shown by the line X in FIG. Therefore, in this case, when the judgment map is referred to in step 204 of FIG. 7 in the second embodiment, the point P5 on the judgment map corresponding to the character size and the chromaticity difference at this time is outside the easy-to-read area A. If it is determined that there is, the character size and the chromaticity difference are simultaneously changed in the subsequent step 205, and the point P5 is moved to the point P6 on the line X within the easy-to-read area A. By outputting the changed character size and chromaticity difference to the navigation device 3 (FIG. 6) in step 206, the character size and color on the map displayed on the monitor 31 can be easily read. It is automatically changed to the difference at the same time. In the above embodiment, the input character size and chromaticity difference need not always be input. If not input, the readability may be determined using a preset value, or a preset easy-to-read character size and chromaticity difference may be output as the determination is not possible. .

[0020]

As described above, according to the display screen designing apparatus of the present invention, it is possible to make an objective judgment of readability, and according to the display screen changing apparatus of the present invention, readability is improved. Automatic display of characters becomes possible.

[Brief description of the drawings]

FIG. 1 is a block diagram of a display screen design apparatus according to a first embodiment of the present invention.

FIG. 2 is a graph showing a relationship between a character size, a chromaticity difference, and readability.

FIG. 3 is a graph showing a relationship between a character size, a chromaticity difference, and readability.

FIG. 4 is a graph showing a relationship between a character size, a chromaticity difference, and readability.

FIG. 5 is a flowchart showing a processing procedure in a CPU.

FIG. 6 is a block diagram of a display screen changing device according to a second embodiment of the present invention.

FIG. 7 is a flowchart illustrating a processing procedure in a CPU.

FIG. 8 is a graph showing a relationship between a character size, a chromaticity difference, and readability.

FIG. 9 shows a character size,
9 is a graph showing a relationship between a chromaticity difference and readability.

FIG. 10 is a graph showing a relationship between a character size, a chromaticity difference, and readability in a fourth embodiment of the present invention.

[Explanation of symbols]

1 ... display screen design device, 11, 21 ... CPU, 12, 2
2 ROM, 14, 24 input interface, 1
5, 25 ... output interface.

Continuation of the front page (72) Inventor Shin Yamamoto 2-802 Manbayama, Midori-ku, Nagoya-shi, Aichi F-term (reference) 5C082 AA01 AA02 AA03 AA21 BA02 BB14 CA32 CA82 CB06 DA87 MM06 MM09

Claims (6)

[Claims] An input means for inputting a character size and a chromaticity difference of a display screen including a character, and a storage means for preliminarily storing the degree of readability of the character in association with the character size and the chromaticity difference. A display screen design apparatus comprising: a determination unit that determines a degree of readability of a character from an input character size and a chromaticity difference with reference to a storage unit; and an output unit that outputs a determination result of the determination unit. 2. The display screen designing apparatus according to claim 1, wherein the degree of readability of the character stored in the storage unit is associated with a character size and a chromaticity difference based on visual characteristics. 3. The display screen designing apparatus according to claim 2, wherein the visual characteristics are visual spatial frequency characteristics. 4. An input means for inputting a character size and a chromaticity difference of a display screen including characters, and a storage means for preliminarily storing a degree of readability of the character in association with the character size and the chromaticity difference. Referring to the storage means, determining at least one of the character size and the chromaticity difference based on the result of the determination by the determining means for determining the degree of readability of the character from the input character size and the chromaticity difference An output unit for outputting the changed character size and / or chromaticity difference. 5. The display screen changing device according to claim 4, wherein the degree of readability of the character stored in the storage unit is associated with a character size and a chromaticity difference based on visual characteristics. 6. The display screen changing device according to claim 5, wherein the visual characteristics are visual spatial frequency characteristics.