JP2002297086A - Display control program and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a detailed image on a small screen such as PDA(personal digital assistance) in an easily visible form. SOLUTION: This program is a display control program, which displays an image, whose one pixel is constituted of N kinds of luminance values which are held in a storage means on a display means, whose one pixel is constituted of N kinds of display elements successively arranged, by making the image correspond to the display elements and the program, has a luminance value converting means for calculating typical luminance values of respective pixels from the N kinds of luminance values of the respective pixels of the picture, which are held in the storage means and an image coordinate conversion means for conducting a conversion, for making typical luminance values correspond to the respective display elements.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control program for a display device provided with display means for forming one pixel with N types of display elements arranged in sequence, and more particularly, to R, G arranged in sequence. , B and other color display elements
The present invention relates to a display control program for a color image display device including a display unit forming pixels. With the spread of mobile devices,
There is an increasing need to display small images, such as maps, with a small number of pixels and thus a small number of pixels.

[0002]

2. Description of the Related Art In a portable device such as a PDA or a portable telephone, miniaturization is prioritized. Therefore, the area of a display means is smaller than that of an ordinary PC, and the number of pixels is limited. Normal PC display is
For example, even if the VGA has the smallest number of pixels, it is 640 x 480 pixels, but PalmOS (registered trademark) of the PDA is 160 pixels.
× 160 pixels, QVGA of Pocket PC (registered trademark)
Is 320 × 240 pixels.

[0003] On the other hand, there are cases where the entire area of interest is browsed on a small screen, such as when browsing a map. Conventionally,
In order to display the area of interest on a small screen such as a PDA or a mobile phone, the area of interest is displayed in a reduced scale or a part of the area of interest is displayed at an appropriate magnification as in the conventional display example shown in FIG. Move to the hidden part by scrolling the screen as needed and display it.

[0004] However, if the image is reduced beyond the pixel density of the display means in order to display the entire area, thinning is required and detailed information is lost. Also, screen scrolling is difficult to operate on portable devices that are often operated with one hand.

[0005] As a means for solving this problem, Japanese Patent Application No. Hei.
-285592 is disclosed. In the described invention, Kathryn T. Spoehr, Stephen W. Lehmkuhle, Naoyuki Imosaka et al., "Visual Information Processing <Software of Seeing>" (Science Inc., 1986), and the Japan Society of Color Science, "New Color Science" Handbook ”(The University of Tokyo Press)
Using the following human visual characteristics described in (1), single-color character display at a resolution higher than the resolution of the color display means is performed.

1) When the spatial frequency of the array of display elements R, G, and B reaches 75 cycles / degree, that is, about the resolution limit of human eyes (viewing angle 0.04 degrees), as shown in FIG. Is less than 10, it is difficult to resolve each element. in this case,
R, G, and B colors are not individually recognized, and humans perceive the mixed colors.

2) In a small visual field (having a viewing angle of 1 degree or less), color vision deteriorates, and it becomes difficult to distinguish hues.

That is, in the case of a color image in which one pixel is composed of display elements of N kinds of colors arranged in sequence and the viewing angle of each pixel is about 1 degree or less, humans can distinguish hues. In particular, in the case of an image in which the luminance of each color display element is substantially equal, the image is sensed as a monochrome image.

The display device according to the above-mentioned invention uses this visual characteristic to display a monochrome character image at a resolution higher than that of the color display means. For example, if the color display means is one of R, G, and B display elements that are sequentially arranged,
When a pixel is configured, the average value of the luminance values of the three pixels of the character image is made to correspond to the direction perpendicular to the arrangement of the R, G, and B display elements, and the luminance of each pixel is arranged in the display element arrangement direction. The value is displayed corresponding to each display element.

That is, in the arrangement direction of display elements, each display element is treated as one pixel and displayed at three times the pixel density, so that the human eye perceives it as a high-definition monochrome image.

[0011]

Images handled in such fields generally include not only monochrome character images but also color images. However, the described invention cannot cope with a color image.

According to the present invention, an object to be displayed at a resolution equal to or higher than the resolution of the display means is displayed on a display means comprising one of N kinds of display elements, for example, N kinds of color display elements. The purpose is to extend not only to color images but also to display them easily.

[0013]

According to the first aspect of the present invention, the display means which constitutes one pixel with N kinds of display elements which are sequentially arranged is provided with N kinds of luminance values held in the storage means. A display control program for displaying an image constituting a pixel in association with a display element, comprising: a luminance value conversion procedure for obtaining a representative luminance value of each pixel from N kinds of luminance values of each pixel of the image stored in a storage unit; And an image coordinate conversion procedure for converting the representative luminance value of each pixel to correspond to each display element.

For example, when the various display elements of the display means are composed of display elements of respective colors of RGB, the luminance value conversion procedure includes the steps of:
The average luminance value of each display element is obtained, or a representative luminance value is obtained by obtaining a Y value by RGB → XYZ conversion, and the image coordinate conversion procedure associates the representative luminance value of each pixel with each display element. .

As a result, an image having a pixel density three times as high as the (color) pixels of the display means is displayed in the arrangement direction of the display elements. Here, when the luminance values of adjacent display elements are appropriately dispersed, a human perceives as a monochrome image.

If the correspondence between each pixel in the image and each display element of the display means stored in the storage means is stored, either the image coordinate conversion procedure or the luminance value conversion procedure may be executed first. .

According to a second aspect of the present invention, an image forming one pixel with N-color luminance values held in the storage means is displayed on display means forming one pixel by sequentially arranged N-color display elements. A display control program for displaying correspondingly, a designated color input procedure for receiving an input for designating a color of a pixel in an image held in a storage unit, a display color input procedure for receiving an input for designating a color to be displayed, A pixel of the color input in the designated color input procedure is searched for in the image held in the storage means, and the pixel of the color is converted into a color input in the display color input procedure, and a pixel of a color not specified is searched for. A brightness value conversion procedure for obtaining a representative brightness value of each pixel from the brightness values of N colors of each pixel of the image held in the storage means, and for a pixel of an unspecified color, the representative brightness value of each pixel corresponds to each display element. Let the specified color The image coordinates conversion procedure for converting the pixels held in the storage means to correspond to the pixels of the display means at a pixel density of 1 / N of the pixel density of the unspecified color pixels. .

This makes it possible to display the pixels of the color input as the designated color in the image held in the storage means with the color input as the display color so as to stand out. For example, when the designated color is designated as blue of the characters in the image and the display color is designated as red, the human perceives that the red characters are displayed in the monochrome image.

According to a third aspect of the present invention, an image forming one pixel with the N-color luminance values held in the storage means is displayed on display means forming one pixel by sequentially arranged N-color display elements. A display control program to be displayed in association with the coordinate input procedure for receiving an input for designating coordinates in an image held in the storage means; and a N-color luminance value of each pixel in the image held in the storage means. A luminance value conversion procedure for obtaining a representative luminance value of a pixel, and a representative luminance value of each pixel is made to correspond to each display element for a pixel of coordinates not specified, and a pixel of coordinates input in the coordinate input procedure is stored in a storage means. And an image coordinate conversion procedure for performing a conversion to make the pixels held in the pixel correspond to the pixels of the display means at a pixel density of 1 / N of the pixel density of the pixel of the coordinates without designation.

For example, the display image is a color map image,
In the coordinate input procedure, the coordinates output from the GPS are input and associated with the coordinates of the color map image, or the coordinates are input by specifying the coordinates in the displayed color map image, and the pixels of the input coordinates are The image held in the storage means is used as a display image as it is.

As a result, a human is perceived as a map image in a monochrome display and at a designated position in a color display. The size of the color display area of the input coordinates may be set in advance by one or more, or may be set from outside.

According to a fourth aspect of the present invention, there is provided the display control program according to the first, second, or third aspect, further comprising an illuminance detection procedure, wherein the illuminance detected by the illuminance detection procedure is limited. If the illuminance is equal to or more than the luminance value, the luminance value conversion procedure obtains the representative luminance value of each pixel from the N color luminance values of each pixel of the image stored in the storage means, and the image coordinate conversion procedure displays the representative luminance value of each pixel. If the conversion corresponding to the element is performed and the illuminance detected in the illuminance detection procedure is less than the limit illuminance, the image coordinate conversion procedure sets the pixels held in the storage means to the pixel density of the pixel when the illuminance equal to or higher than the limit illuminance is detected. It is characterized in that conversion corresponding to pixels of the display means is performed at a pixel density of 1 / N.

Thus, when the surrounding brightness is equal to or less than a predetermined value, a color image is displayed, and when the surrounding brightness exceeds a predetermined value, a high-resolution monochrome image is displayed.

In the display control program according to the present invention, there is provided a coordinate input procedure for receiving an input for designating coordinates in an image held in a storage means, wherein the map image is to be displayed. May be displayed in the color input in the display color input procedure.

Further, by adding a gradation correction procedure to the display control program according to claim 1, 2, or 3, it is possible to easily perform gradation correction such as a change in gamma characteristic with respect to the representative luminance value. It is possible to do.

In a color image display using three primary colors, for example, R, G, B, brightness, brightness,
Although the saturation and hue are determined, if the luminance values of R, G, and B are simply changed proportionally for brightness control, the saturation and hue also change, and the hue changes. However, since a human perceives the display image obtained by the luminance value conversion of the present invention as a monochrome image, the brightness control, which was difficult with a color image, can be easily performed as the brightness control of a monochrome image. This allows
Further, the visibility can be improved.

In the display control program according to a third aspect of the present invention, the coordinate input step detects a moving speed based on a time change of the position coordinates output from the GPS, and the luminance value converting step detects the moving speed based on the detected speed. The size of the color display area may be determined accordingly. For example, the visibility is increased by setting and displaying a color display range which is large when the speed is high and small when the speed is low.

[0028]

FIG. 1 shows a processing flow of the first embodiment, and FIG. 2 shows a display device of the first embodiment. Input means 1
Performs input of a document image. The document image may be input via a communication line. The storage unit 3 holds an original document image and a display image to be displayed. Each pixel of the display image corresponds to each display element of the display means 4.

The display control means 2 has image coordinate conversion means and luminance value conversion means for associating the pixels of the document image in the storage means 3 with the pixels of the display image, ie, the display elements of the display means 4.

FIG. 3 shows an example in which the display means 4 is composed of three types of display elements of R, G and B sequentially arranged in the horizontal direction.
Shows the corresponding relationship with the display element.

In the storage means, the luminance value of the pixel is represented by p, the horizontal coordinate is represented by m, and the vertical coordinate is represented by n. The luminance value of each pixel p (m, n) is composed of three components of red, green and blue luminance values r (m, n), g (m, n) and b (m, n). Is done.

On the other hand, on the display means, each display element arranged sequentially is defined as a pixel P, and the horizontal coordinate is defined as u,
The vertical coordinate is represented by v. That is, the coordinate value of the pixel on the display means is three times the coordinate value in the case of the normal display method in which R, G, and B are one pixel.

In this example, the representative values are represented by the R, G, and B luminance values, r (m, n), g (m, n), and b (m, n) of the pixel p (m, n) in the storage means 3. The luminance value p (m, n) is obtained, and the representative luminance value p (m,
n + 1), average value of p (m, n + 2) is a display element of the display means 4.
P (u, v), that is, R (u / 3, v). Here, “u / 3” is an integer rounded up.

Similarly, p (m + 1, n), p (m + 1, n + 1), p (m +
The average value of (1, n + 2) is P (u + 1, v), that is, G (u / 3, v), p
The average value of (m + 2, n), p (m + 2, n + 1) and p (m + 2, n + 2) is P (u + 2,
v), that is, B (u / 3, v).

Thus, the arrangement direction of the display elements is associated with a pixel density three times the original pixel density of the display means 4.

In FIG. 1, in step S1, the document image is stored in the storage means 3, and in step S2, the pixel p of the image held in the storage means 3 by image coordinate conversion and the display element P of the display means 4 are compared. Perform association.

In step S3, brightness Y is obtained by XYZ conversion from the R, G, B values of the pixel p (m, n) of the original image in the storage means 3 by luminance conversion, and each display element R,
A luminance value corresponding to Y of G and B is set as a representative luminance value. Alternatively, the average of the R, G, and B luminance values may be used as the representative luminance value.

In step S4, as shown in FIG. 2, in the vertical direction of the display element array, the average value of the luminance values of three pixels of the image in the storage means 3 is obtained. The average value is
A simple average or a predetermined conversion function may be used.

In step S5, the average value obtained in step S4 is set as a representative luminance value in correspondence with the display element of the display means 4 in accordance with the coordinate correspondence in step S2, and the display image is stored in step S6. 3
To memorize.

FIG. 4 shows a flow of processing according to a second embodiment of the present invention. In step S21, the document image is stored in the storage unit 3, and in step S22, the display image held in the storage unit 3 is displayed on the display unit 4. In step S23, a designated color and a display color are input. The designated color and the display color may be set in advance.

Steps S24 to S27 are the same as steps S2 to S5 in the first embodiment.

In step S28, the image of the designated color input in step S23 is searched for the image held in the storage means 3, and the representative luminance value of the pixel of that color is set by replacing it with the display color input in step S23. In step S29, the set display image is stored in the storage unit 3.

FIG. 5 shows a flow of processing according to a third embodiment of the present invention. In step S51, the map image is stored in the storage unit 3
In step S52, the map image stored in the storage unit 3 is displayed on the display unit 4. In step S53, the coordinates output from the GPS are input and associated with the coordinates of the color map image, or the coordinates are input by designating the coordinates in the displayed color map image.

In step S54, the coordinates of the neighborhood area to be displayed in color at the input coordinates are calculated. One or more sizes of the neighborhood area for color display may be set in advance, or may be set externally.

In step S55, the inside and outside of the vicinity area are determined for the pixels in the image held in the storage means 3.

For pixels determined to be outside the vicinity area, the same processing as in steps S2 to S6 of the first embodiment is performed in steps S56 to S60.

For the pixels determined to be in the neighboring area, the brightness value conversion and the coordinate conversion are not performed, and the image held in the storage means is stored as it is as the display image.

The third embodiment is applied to the example of the color map image shown in FIG. 6. In the vicinity of the input coordinates, color display (at a normal resolution) is performed without performing luminance value conversion and coordinate conversion. Perform value conversion and coordinate conversion (at 3 times resolution)
FIG. 7 shows an example of the result of the monochrome display.

For example, by detecting the current position of the display device by GPS and setting it as one input coordinate, and inputting the destination in the image displayed on the display means as another input coordinate, the current position is displayed on a monochrome display map. Highlighting such as displaying the position and the destination in color becomes possible.

FIG. 8 shows the flow of the process according to the fourth embodiment of the present invention. In this case, it is assumed that the limit illuminance has been set in advance. As the limit illuminance, for example, the illuminance of the surroundings is sequentially changed from dark to bright while switching between the original image display and the representative luminance value image display according to claim 1 of the present invention to evaluate the visibility, and the visibility is replaced. The ambient illuminance may be set.

If the surrounding illuminance detected by the illuminance detection procedure is equal to or greater than the limit illuminance, the representative luminance value conversion and the image coordinate conversion are performed to display a high resolution image.

(Supplementary Note 1) The image forming one pixel with the N kinds of luminance values held in the storage means is made to correspond to the display element by the display means forming one pixel by the N kinds of display elements arranged sequentially. A display control program for displaying a representative luminance value of each pixel from N kinds of luminance values of each pixel of an image stored in the storage means; And an image coordinate conversion procedure for performing a conversion corresponding to the display control program.

(Supplementary Note 2) An image constituting one pixel is displayed in association with the display means constituting one pixel by the display elements of N colors arranged in sequence in the luminance value of N colors held in the storage means. A display control program, comprising: a designated color input procedure for receiving an input for designating a color of a pixel in an image held in a storage unit; a display color input procedure for receiving an input for designating a color to be displayed; In the image, a pixel of the color input in the designated color input procedure is searched, and the pixel of the color is converted into the color input in the display color input procedure,
For a pixel of an unspecified color, a luminance value conversion procedure for obtaining a representative luminance value of each pixel from the luminance values of N colors of each pixel of the image held in the storage means, and for a pixel of an unspecified color, a representative value of each pixel A conversion is performed in which the luminance value is made to correspond to each display element, and for the pixels of the designated color, the pixels held in the storage means are made to correspond to the pixels of the display means with a pixel density of 1 / N of the pixel density of the unspecified color pixels. And an image coordinate conversion procedure.

(Supplementary Note 3) An image constituting one pixel is displayed in correspondence with the display means constituting one pixel by the display elements of N colors arranged in sequence in the luminance value of N colors held in the storage means. A display control program, comprising: a coordinate input procedure for receiving an input designating coordinates in an image held in the storage means; and a representative brightness value of each pixel from the N-color brightness values of each pixel in the image held in the storage means. And the representative luminance value of each pixel is made to correspond to each display element for the pixel of coordinates not specified, and for the pixel of the coordinates input in the coordinate input procedure, the pixel held in the storage means is stored. An image coordinate conversion procedure for performing a conversion corresponding to a pixel of the display means at a pixel density of 1 / N of a pixel density of a pixel of unspecified coordinates.

(Supplementary note 4) The display control program according to claim 1, further comprising an illuminance detection procedure, wherein the illuminance detected by the illuminance detection procedure is equal to or greater than the limit illuminance. The luminance value conversion procedure obtains the representative luminance value of each pixel from the N color luminance values of each pixel of the image held in the storage means, and the image coordinate conversion procedure converts the representative luminance value of each pixel to each display element. When the illuminance detected by the illuminance detection procedure is less than the limit illuminance, the image coordinate conversion procedure sets the pixels held in the storage unit to 1 / N of the pixel density of the pixel when the illuminance equal to or higher than the limit illuminance is detected A display control program for performing a conversion corresponding to a pixel of a display means with a density.

(Supplementary Note 5) An image forming one pixel with N kinds of luminance values held in the storage means is made to correspond to the display element by the display means forming one pixel by the N kinds of display elements arranged in sequence. A display value display unit for displaying a representative luminance value of each pixel from N kinds of luminance values of each pixel of an image stored in a storage unit; A display device comprising: image coordinate conversion means for performing a conversion corresponding to.

(Supplementary note 6) The display control program according to claim 2, further comprising a coordinate input procedure for receiving an input for specifying a coordinate in the image held in the storage means with the map image as a display target. A display control program characterized in that the set coordinates are displayed in a color input in a display color input procedure.

(Supplementary Note 7) The display control program according to any one of claims 1, 2 and 3, further comprising a gradation correction procedure for performing gradation correction on the representative luminance value. Display control program.

(Supplementary Note 8) The display control program according to claim 3, wherein the coordinate input step detects a moving speed based on a time change of position coordinates output from the GPS, and the luminance value conversion step detects the moving speed. A display control program for determining a size of a color display area in accordance with the set speed.

(Supplementary Note 9) An image forming one pixel with the N kinds of luminance values held in the storage means is made to correspond to the display element by the display means forming one pixel by the N kinds of display elements arranged sequentially. A luminance value conversion procedure for obtaining a representative luminance value of each pixel from N kinds of luminance values of each pixel of an image held in the storage means, And a computer-readable recording medium storing a program, the method comprising: performing an image coordinate conversion procedure for performing a conversion corresponding to a program.

[0061]

As described above, according to the present invention, 1) display in which the pixel density to be displayed is increased to the display element density of the display means, 2) highlighted display by displaying a color image in a monochrome image 3) Improvement of visibility in an environment where brightness changes, such as outdoors, 4) Improvement of contrast by gradation correction display, and 5) Map visibility by changing the size of the highlighted display area according to the moving speed of the display device. Can be improved.

[Brief description of the drawings]

FIG. 1 is a flowchart of a process according to a first embodiment.

FIG. 2 is a first embodiment of a display device.

FIG. 3 shows an example of coordinate correspondence between storage means and display means.

FIG. 4 is a flowchart of a process according to a second embodiment;

FIG. 5 is a flowchart of a process according to a third embodiment;

FIG. 6 is an example of a color map image

FIG. 7 is a display effect according to the third embodiment (simultaneous display of color and monochrome).

FIG. 8 is a flowchart of a process according to a fourth embodiment.

FIG. 9 shows a conventional display example.

FIG. 10: Contrast perception characteristics of human eyes

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input means 2 Display control means 3 Storage means 4 Display means

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Nobuaki Usui 4-1-1, Kamidadanaka, Nakahara-ku, Kawasaki-shi, Kanagawa F-term within Fujitsu Limited (Reference) 5C080 BB05 CC03 DD01 EE01 EE17 EE29 GG02 JJ01 JJ05 JJ07 KK02 KK07

Claims (5)

[Claims] 1. A display means comprising one type of N kinds of display elements arranged in sequence, a display means comprising:
A display control program for displaying an image forming one pixel with various kinds of luminance values in association with display elements, wherein a representative luminance value of each pixel is calculated from N kinds of luminance values of each pixel of the image held in the storage means. A display control program for executing a luminance value conversion procedure to be obtained and an image coordinate conversion procedure for performing conversion for making a representative luminance value of each pixel correspond to each display element. 2. A display means comprising one pixel with display elements of N colors arranged in sequence, and N stored in a storage means.
A display control program for displaying an image forming one pixel in correspondence with a luminance value of a color, wherein a designated color inputting procedure for receiving an input for designating a color of a pixel in an image held in a storage means; A display color input procedure for accepting an input designating a color, and a search for a pixel of the color input in the designated color input procedure in the image held in the storage means, and for the pixel of the color, a color input in the display color input procedure. And a luminance value conversion procedure for obtaining a representative luminance value of each pixel from the N luminance values of each pixel of the image held in the storage means for pixels of the unspecified color; The representative luminance value of each pixel is made to correspond to each display element, and for the pixel of the designated color, the pixel held in the storage means is set to the pixel of the display means at a pixel density of 1 / N of the pixel density of the pixel of the unspecified color. The corresponding conversion Display control program for executing the Cormorant image coordinate transformation procedure. 3. A display means comprising one pixel with display elements of N colors arranged in sequence, and N stored in a storage means.
A display control program for displaying an image forming one pixel in correspondence with a luminance value of a color, a coordinate input procedure for receiving an input for designating coordinates in an image stored in a storage unit, and an image stored in the storage unit A luminance value conversion procedure for obtaining a representative luminance value of each pixel from luminance values of N colors of each pixel in the pixel, and a coordinate input procedure for associating a representative luminance value of each pixel with each display element for a pixel of unspecified coordinates. For the pixel at the coordinates input in step 2, the image coordinate conversion procedure of performing a conversion to make the pixels held in the storage means correspond to the pixels of the display means with a pixel density of 1 / N of the pixel density of the pixels of the coordinates without designation. Display control program to be executed. 4. The method according to claim 1, 2 or 3.
The display control program according to the above, having an illuminance detection procedure, if the illuminance detected in the illuminance detection procedure is equal to or greater than the limit illuminance,
The brightness value conversion procedure is based on N of each pixel of the image held in the storage means.
The representative luminance value of each pixel is obtained from the luminance value of the color, and the image coordinate conversion procedure performs a conversion to make the representative luminance value of each pixel correspond to each display element, and if the illuminance detected by the illuminance detection procedure is less than the limit illuminance, ,
In the image coordinate conversion procedure, a conversion is performed so that the pixels held in the storage means are made to correspond to the pixels of the display means with a pixel density of 1 / N of the pixel density of the pixels when the illuminance equal to or higher than the limit illuminance is detected. Control program. 5. A display means comprising one kind of pixel composed of N kinds of display elements which are sequentially arranged, and a display means for storing N pixels in a storage means.
What is claimed is: 1. A display device for displaying an image forming one pixel with different kinds of luminance values in association with display elements, wherein a representative luminance value of each pixel is calculated from N kinds of luminance values of each pixel of the image held in a storage means. A display device comprising: a luminance value conversion unit to be obtained; and an image coordinate conversion unit that performs conversion for making a representative luminance value of each pixel correspond to each display element.