JP2000347786A - Method and device for generating pointer display color for color display and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep optimal contrast with the display color of the background and to surely recognize the position of a pointer by selecting a color farthest from the display color of the background concerning the display color of the pointer. SOLUTION: New display color data for each pixel of the pointer are generated while using a spectrum locus (xlock, ylock)k1,M of xy chromaticity diagram data 18 and the coordinates of achromatic points (white points). Namely, for example, a color corresponding to an intersection (x1-, y1-) of a straight line, which is extended while connecting a chromaticity coordinate (x1, y1) and an achromatic point (white point) coordinate (xachr, yachr), crossing a curved line (spectrum locus) is selected as the color of the pointer. Thus, the display color of the pointer can be changed in real time corresponding to a change in the display color of the background or periphery at the position of the pointer. As a result, the visibility of the pointer on a color display device can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for generating a pointer display color in a direct-view or projection type color display using a cathode ray tube display (CRT), a liquid crystal display, or the like.

[0002]

2. Description of the Related Art As is well known, a pointer displayed on a display device screen attached to a computer or the like is composed of a set of pixels on the display screen and points to a specific area or a specific object on the display screen. Used for The position of the pointer is controlled by an operator using an input device such as a pointing device (commonly known as a mouse) or a joystick. Conventionally, the display color of this pointer is
The operator can set the color to an arbitrary color and display it.

[0003]

By the way, in the color display, depending on the display content, the background or the surrounding color of the pointer changes in real time and becomes the same display color as the initially set display color of the pointer. The pointer position on the display screen may not be recognized.

However, conventionally, the display color of the pointer is set before the desired display is performed, and is fixed to the same color until a new setting is performed. In a position where the background or the surrounding color is the same, the pointer position cannot be recognized, and there is a problem that the operation of the pointer is hindered.

An object of the present invention is to change the pointer display color in color display in real time with respect to a change in the display color of the background (pointer position and its surroundings),
It is an object of the present invention to provide a pointer display color generation method and apparatus for color display that can maintain the contrast with the display color of the background optimally and reliably recognize the position of the pointer.

[0006]

According to the method and apparatus of the present invention, the position data of the pointer on the display screen and the display color data of the background of each pixel at the pointer position (that is, R, G, B).
Is acquired (read) from the background display data storage means, the R, G, B data is converted into tristimulus values X, Y, Z, and the X, Y, Z are converted into chromaticity x, y From the chromaticity x, y and Y corresponding to luminance, the complementary wavelength and the non-spectral color (red-violet line (pure purple locus)) on the xy chromaticity diagram of CIE (International Commission on Illumination) Using the definition, a new chromaticity x ′, y ′ and luminance Y ′ are obtained, and these are calculated as new X ′, y ′.
Y ′, Z ′, and X ′, Y ′, Z ′ are converted to generate new display color data R ′, G ′, B ′, which are applied to the pointer display on the display screen. It is characterized by doing so.

In this case, the display data is R, G, B of the background.
The present invention can be applied to other data expression formats. In the case of a data expression format other than R, G, B, CI
The spectrum locus data on the xy chromaticity diagram of E and the achromatic color point coordinate data on the chromaticity diagram are stored in a memory, and the position data of each pixel of the pointer is obtained from the pointer position monitoring unit while obtaining the position data. The display color data of the background of each pixel corresponding to the obtained position data is obtained from the background display data storage unit, and the obtained display color data is converted into a dominant wavelength value, a stimulus purity value, and a luminance value, and a new stimulus is obtained. After fixing the purity to the maximum value usable in the color display device and fixing the new luminance value to the maximum value usable in the color display device, the complementary color of the display color data is a spectral color or a non-spectral color. It is determined whether the color is a color, and if the color is a spectrum color, the spectrum locus data and achromatic color point coordinate data stored in the memory are referred to based on the definition of the complementary color of the CIE, and the complementary color is determined. Obtain a wavelength value, set this as a new main wavelength value, and furthermore, when a complementary color of the display color data is a non-spectral color, a straight line connecting a point representing a display color on the chromaticity diagram and an achromatic color point, The wavelength value of the non-spectral color at the intersection with the red-violet line is obtained by referring to the spectrum locus data and the achromatic color point coordinate data stored in the memory, and this is set as the main wavelength value. The processing of the step of generating the color of each pixel of the pointer based on the new stimulus purity value and the luminance value is repeated at predetermined time intervals, and the pointer is displayed with the generated color and brightness of each pixel.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a functional block diagram showing the configuration of a personal computer which is an embodiment of an embodiment for displaying a pointer using the method according to the present invention.

The personal computer 1 shown in FIG.
It is composed of a computer main body 10 and a color display device 11, and the computer main body 10 is provided with a keyboard 12 and a pointing device 13. A processor 14 and a memory 15 are provided inside the computer main body 10. The processor 14 executes various application programs under the management of an operating system (OS) stored in the memory 15,
Necessary information is displayed on the display screen of the color display device 11. In this case, display information such as characters and graphics displayed on the color display device 11 is read from the display data storage area 16 in the memory 15. When displaying characters and graphics, a pointer P whose position can be changed by operating the pointing device 13 is displayed on the display screen. The pointer P is made up of a group of pixels on the display screen and points to a specific area or a specific object on the display screen, or to a computer connected to the display screen at a specific position on the display screen. Is used for inputting the. For example, an arrow shape as shown in FIG. 2 is often used. This pointer P
Is controlled by an operator using an input device such as a pointing device 13 or a joystick. The current position of the pointer P is monitored by the pointer position monitoring means 17. The pointer position monitoring means 17 is usually provided with an operating system (O
This is provided as one function of S).

In the present invention, in order to change the display color and brightness (luminance) of the pointer P in real time in accordance with the change of the display color of the background display image (hereinafter simply referred to as background), a memory is used. 15 stores xy chromaticity diagram data 18 conforming to CIE (International Commission on Illumination) standards and a pointer display color generation program 19.

Hereinafter, various embodiments of the pointer display color generation method according to the present invention, which are performed in the above-described implementation environment, will be described in detail with reference to flowcharts.

(Embodiment 1) FIG. 3 is a diagram showing an example of xy chromaticity diagram data 18 stored in a memory 15, and new display color data of each pixel of a pointer P is generated by the x
The spectrum locus (xlock _k , y
loc _k ) _{k = 1, M} and the coordinates of the achromatic point (white point). In FIG. 3, coordinates (xloc ₁ , yloc _l )
And (xloc _M , yloc _M ) represent both ends of the spectrum trajectory, and (x _achr , y _achr ) represent the coordinates of the achromatic point (white point). Regardless of the color of the image displayed on the display screen, any color is applied to one of the coordinate points enclosed by the curve and the straight line in the xy chromaticity diagram, and corresponds to each respective color. It can be defined by the values of x and y. The basic principle of the present invention is to select the color farthest from the background color of the pointer, and select the pointer color in three cases depending on the background color. are doing. That is, as shown in FIG. 4, an area surrounded by a curve and a straight line in the xy chromaticity diagram is divided into areas I, II, and III. A straight line connecting (x ₁ , y ₁ ) and achromatic point (white point) coordinates (x _{ac hr} , y _achr ) corresponds to the intersection ( x ₁ , y ₁ ) at which the line intersects the curve (spectral locus). The color is selected as the color of the pointer P. Similarly, when the background color is a color belonging to the area II, its chromaticity coordinates (x ₂ , y ₂ ) and achromatic point (white point) coordinates (x _achr ,
y _achr ), a color corresponding to the intersection ( x ₂ , y ₂ ) at which a straight line extended from the straight line that intersects the curve (spectral locus) is selected as the color of the pointer P, and the background color belongs to the region III. In this case, a straight line connecting the chromaticity coordinates (x ₃ , y ₃ ) and the achromatic point (white point) coordinates (x _achr , y _achr ) intersects a curve (spectral locus) at an intersection ( x ₃ , y) _The color corresponding to ₃ ) is selected as the color of the pointer P.

FIGS. 5 to 8 are flowcharts showing the first embodiment.

(1) First, the CIE (Comission In) is started by activating the pointer display color generation program 19.
ternationale de-l'Eclairage x
Spectrum locus data (xlock _k , yl) on the y chromaticity diagram
oc _k ) _{k = 1, M} and achromatic point coordinate data (x _achr , y _achr )
Are prepared (steps S1 and S2). spectrum locus data (xloc _k, yloc _k) on the xy chromaticity diagram _{k = 1, M} and achromatic point coordinate data _{(x a chr,} y achr) as a method for preparing the, (a) the spectrum locus data (xloc _k ,
yloc _k ) _{k = 1, M} and achromatic point coordinate data (x _achr , y
_achr ) is prepared by storing the xy chromaticity diagram data 18 consisting of
Since c _k , yloc _k ) _{k = 1, M} can be approximated by a function y = f _locus (x), the approximate calculation formula and the achromatic color point coordinate data (x _achr , y _{ac hr} ) are stored in the memory 15. There is a method of preparing by storing it in. Either method may be used.

(2) Next, a time interval t for performing the processing is set (step S3).

(3) Next, the maximum luminance data Ymax usable in the color display device 11 is input from the keyboard 12 (step S4). As the maximum luminance data Ymax, a value defined in the specifications of the color display device 11 is used.

(4) Next, the coordinates on the xy chromaticity diagram of FIG.
(Xloc₁, Yloc_l) And (xloc_M, Yloc_M)
, And (xloc_k, Yloc_k)_{k = 1, M}And space
The vector "y = (y_achr-Yloc₁) / (X_achr−
xloc₁) X + (yloc₁x_{ach r}-Y_achrxl
c₁) / (X_achr-Xloc₁) "At the intersection (xl
c ₁,yloc _l). Also, (xloc_k, Yl
oc_k)_{k = 1, M}And the spectrum locus "y = (y_achr-Yl
c_M) / (X_achr-Xloc_M) X + (yloc_Mx_achr
-Y_{ach r}xloc_M) / (X_achr-Xloc_M) "
point(xloc _M,yloc _M) (Step S)
5). That is, a locus that divides the regions I, II, and III in FIG.
Find the gauge. Note that this step is not necessarily
There is no need to perform this, and in step S10 of FIG.
May go.

(5) Next, the position data of each pixel of the pointer P is read (step S6). More specifically, position coordinate data (U _i , V _i ) _{i = 1, N} of each pixel on the current display screen of the pointer P is obtained from the pointer position monitoring means 17. Here, N represents each pixel of the pointer P.

(6) Next, display color data of the background of each pixel N corresponding to the acquired position data of the pointer P, that is, three primary color information of R, G, B (R _i , G _i , B _i ) _{i = 1, N} is read (step S7). Specifically, three primary background information from the display data storage area 16 of the memory _{15 (R i, G i,} B
_i ) Acquire _{i = 1, N.}

(7) Next, the obtained primary color information of R, G, and B (R _i , G _i , B _i ) _{i = 1, N} is set to X, Y,
The data of Z (X _i , Y _i , Z _i ) is converted into _{i = 1, N} (step S8).

Here, according to the conversion equation, the primary stimuli of R, G, and B are calculated as follows: R = 700.0 nm, G = 546.1
nm, B = 435.8nm monochromatic light,

[0023]

X = 2.7689R + 1.7517G + 1.1302B Y = 1.0000R + 4.5907G + 0.0601B Z = 0.00000R + 0.0565G + 5.5943B

(8) Next, the converted X, Y, Z data (X _i , Y _i , Z _i ) _{i = 1, N} is converted into chromaticity coordinates (x _i , y _i , Y _i ) _{i = 1, N} are converted (step S9).

Here, this conversion equation is:

[0026]

X _i = X _i / (X _i + Y _i + Z _i ) y _i = Y _i / (X _i + Y _i + Z _i )

(9) Next, step S1 and step S2
Locus data and achromatic point (white point) prepared in
Using the coordinate data, it is determined whether or not the complementary color of the background display color data is a spectral color. If the complementary color is a spectral color, that is, the chromaticity coordinates (x _i , y _i ) and the achromatic point (x
_achr , y _achr ), if the straight line connecting to the spectrum locus and the spectral color having an intersection, the number of intersections is further determined,
The coordinates of the intersection point when the intersection point is one, the achromatic locus if intersection of the two _(x achr, y achr) chromaticity coordinates with respect to (x _i, y _i) on the opposite side of the intersection coordinates and the new chromaticity coordinates (x _i, y _i). However, when the complementary color of the background display color data is a non-spectral color, that is, (x _i , y _i )
Achromatic point _(x achr, y achr) If the straight line connecting the no spectrum locus and the intersection point, the chromaticity coordinates (x _i, y _i)
Achromatic point (x _AChR, y _AChR) and the straight line connecting the red purple line (purple boundary also referred to) a non-spectral colors of coordinates of the intersection of the new chromaticity coordinates (x _i, y _i) and (Step S1
0). Step S10 in FIG. 7 represents such an algorithm.

Here, the coordinates (x ₁ , y _l ) shown in FIG.
(X ₂ , y ₂ ) and (x ₃ , y ₃ ) show examples of display color data of the background of the pixel of the pointer P, and the three types of areas I,
The cases belonging to II and III are shown. The coordinates (x _1,
y _l ), ( x ₂ , y ₂ ), ( x ₃ , y ₃ ) correspond to step S 1
0 indicates new display color data generated from each display color data.

[0029] The coordinates _{(x 1, y l),} (x 2, y 2),
( X ₃ , y ₃ ) are (x ₁ , _yl ) and achromatic point (x
_AChR, straight line connecting the _{y achr), (x 2,} y 2) and (x _AChR, a straight line connecting the y _AChR) and, and _{(x 3, y 3) (} x
_achr , y _achr ), the spectrum locus and the magenta line (pure purple locus: straight line connecting both ends of the spectrum locus)
Is the intersection with the closed curve consisting of

The "if" following statement five lines (x _1, y _l) at step S10 in FIG. 7 corresponds to the portion for obtaining the statement of 8 rows of the following "else" or less (x _3, y ₃ ) is equivalent to the part for obtaining, and the sentence of the next three lines following “else” is ( x
₂ , y ₂ ).

(10) Next, new chromaticity coordinates (x _i ,
y _i ) is converted into data of X and Z among the three stimulus values, and the maximum luminance value Ymax input in step S4 is substituted as the value of Y among the three stimulus values, and new tristimulus values X, Y, and Z. That converts _{(x i, y i, Y} i) i = 1, N new color information _{(x i ', y i'} , Y i ') to _{i =} 1, _N. Here, a _{(x i ', y i'} ) = (x i, y i) i = 1, N, Y
_i '= Ymax.

Further, the new tristimulus values X, Y, Z are converted into new R, G, B data. That is,
(X _i ′, y _i ′, Y _i ′) _{i = 1} , and _N as (R _i ′, G _i ′,
B _i ') _{i = 1} , _N. Further, the color information (R _i , G _i , B _i ) of each pixel of the pointer P obtained in step S7
_{i = 1} , _N is _replaced with new color information (R _i ′, G _i ′, B _i ′) _{i = 1} , _N
(Step S11).

By the processing in step S11, the color of each pixel of the pointer P is displayed in a complementary color relationship far away from the background color.

(11) Next, new position information (U _i ', V _i ') _{i = 1} , _N of the pointer P is obtained (step S1).
2), the previous position information (U _i ,
V _i ) Compare _{i = 1} , _N with and determine whether or not the pointer positions are the same (step S13). If the pointer position has not changed, the process waits for a predetermined interval time t2 (step S14), and the determination in step S12 is performed again. If it is determined by this determination that the pointer position has changed, the process returns to step S6, and the processing after step S6 is repeatedly executed.

Therefore, according to the present embodiment, in accordance with the change in the position of the pointer P on the display screen, the display color is displayed while changing in real time with the display color complementary to the background color at the current position. Is done. For example, as shown in FIG. 9, when the pointer P is located at the boundary between the black background 91 and the white background 92, the pointer P is displayed in a color far away from the background color. This makes it possible to reliably recognize the pointer P regardless of the background color.

(Embodiment 2) In Embodiment 1 described above,
The position information (U _i , V _i ) _{i = 1} , _N of each pixel of the pointer P obtained at step S6 is obtained at each pixel of the pointer P obtained at the previous step (step S12 or the previous step S6). And the display color information (R _i , G _i , B _i ) _{i = 1} , _N of the background of each pixel acquired in step S7 is the same as the previously acquired display color information. Steps S8 to S11
Without performing the processing up to this point, the display using the display color data of each pixel of the pointer P generated before this step may be continued for a predetermined time, and then step S6 may be executed. By doing so, the processor 14
The load on the device is reduced.

(Embodiment 3) In the above-described first or second embodiment, the display colors of all the pixels forming the pointer P are converted, but the distinction from the background is clear. Therefore, the processing from step S1 to step S13 is applied only to the outermost pixel among the pixels constituting the pointer P, and the display color of the pixel inside the pointer excluding the outermost pixel is arbitrary. May be set to a single color. Alternatively, the display color of the pixels inside the pointer excluding the outermost periphery may be a single color determined by applying the processing of steps S1 to S13 to one of the display color data of the background inside the pointer. Good. In this case, only the outermost display color of the pointer P changes according to the change of the background color. An example is shown in FIG. In FIG. 10, reference numeral 91 denotes a black background, and 92 denotes a white background.

(Embodiment 4) In the above-described first embodiment, the display colors of all the pixels constituting the pointer P are converted. For the display color of the pixels inside the pointer except for the outermost periphery, the fact that the shape of the pointer P is a line object is used. A pair of two pixels may be determined, and the difference between the display colors of the pixels of the pair may be determined by linearly distributing the difference between the pixels of the pair.

Hereinafter, this method will be described with reference to the flowchart of FIG.

(1) First, as shown in FIG.
Is determined (step S21).

(2) Next, the coordinates of the outermost pixel of the pointer P are determined, and when one coordinate is (U _i , V _i ) _{i = 1, N} , the coordinates that are the target coordinates with respect to the target axis 201 Point (S _i , T _i )
_{Find i = 1, N.} In FIG. 2, a and b are shown as examples of coordinate points targeted for the target axis 201. And
The pixel of the target coordinate point with respect to the target axis 201 is set as one pair (step S22).

(3) Next, the coordinates (U _i ,
V _i ) _{i = 1, N} and (S _i , T _i ) _{i = 1, N} color information (R _{UV, i} , G
_{UV, i} , B _{UV, i} ) _{i = 1, N} and (R _{ST, i} , G _{ST, i} , B _{ST, i} )
_{i = 1, N} is obtained (step S23).

(4) Next, steps S7 to S10 in the first embodiment are performed on the outermost pair of pixels of the pointer P.
, And the color information (R _{UV, i} ,
G _{UV, i} , B _{UV, i} ) _{i = 1, N} and (R _{ST, i} , G _{ST, i} , B _{ST, i} )
_{i = 1, N} is _replaced with new color information (x ′ _{UV, i} , y ′ _{UV, i} ,
_{Y'UV, i} ) _{i = 1, N} and ( _{x'ST, i} , _{y'ST, i} , _{Y'ST, i} )
_{i = 1, N} is converted (step S24).

As a result, the color information of the pixel at the coordinate points a and b of the pair in FIG. 2 is determined to be a color on the chromaticity diagram such as a and b in FIG.

(5) Next, the coordinates (U, V) of the pointer pixels other than the outermost periphery are expressed as “V = (V _i −T _i ) / (U _i −S _i ) U
_{+ (U i T i -V i} S i) / (U i -S i) because the line of "based on the following" Equation 4 ", the color information of the pointer pixels other than the outermost (x", y ") Is obtained (step S25).

[0046]

(3) ((x ″ −x ′ _{UV, i} ) ² + (y ″ −y ′ _{UV, i} ) ² ) = ((U−U _i ) ² + (V−V _i ) ² ) / (( U _i −S _i ) ² + (V _i −T _i ) ² ) * ((x ′ _{ST, i} i−x ′ _{UV, i} ) ² + (y ′ _{ST, i} −y ′ _{UV, i} ) ² ) y ″ = (y ′ _{UV, i} −y ′ _{ST, i} ) / (X ′ _{UV, i} −X ′ _{ST, i} ) X ″ + (y ′ _{ST, i} X ′ _{UV, i} −y ′ _{UV, i} X ′ _{ST, i} ) / (X ′ _{UV, i} −X ′ _{ST, i} ) (6) Next, new color information (x ″, y ″, Y ″) into which the maximum luminance value Y ″ is substituted New tristimulus values X ", Y",
Z ". Further, the three stimulus values X", Y ",
Z "is converted to R", G ", B" data, and pointer P
Are converted into the new R ", G", B "data (step S26).

According to this embodiment, the color of the pixel inside the outermost periphery of the pointer P is obtained by linearly distributing the difference between the colors of the pixels of the outermost periphery. Thus, the load on the processor 14 can be reduced.

(Fifth Embodiment) In the first to fourth embodiments, Y ′ or Y ″ corresponding to the luminance value among the three stimulus values may be determined according to the procedure shown in the flowchart of FIG. (1) Obtain the luminance value Yi of each pixel of the pointer surface table
(Step S31). (2) Next, the minimum luminance value bmin and the maximum luminance value bm among them
ax is extracted (step S32). (3) Next, the average value b of the minimum luminance value bmin and the maximum luminance value bmax is calculated (step S33). (4) Next, a new luminance value Y of Kakuesaku _'i or Y "
the _i, Y _'i or Y _"i time is greater than or equal to b is Y' _i or Y"
the _i and bmin, other bmax the the Y _'i or Y _"i when
(Step 34). (5) Next, the luminance value Y _i of each pixel is converted into a new luminance value Y _i or Y ″ _i (step S35). By doing so, the contrast is improved, and the image can be more easily viewed. .

(Embodiment 6) By the way, in the above embodiment, the case where the display data is in the R, G, B data format has been described. Can be applied. FIG. 14 is a flowchart showing a processing procedure in that case. (1) First, the spectrum locus data on the xy chromaticity diagram and the achromatic color point coordinate data on the chromaticity diagram are stored in the memory 15 (step S41). (2) Next, the position data of each pixel of the pointer P is obtained from the pointer position monitoring means 17 (step S42). (3) Next, display color data of the background of each pixel corresponding to the obtained position data is obtained from the background display data storage means (corresponding to the storage area 16 in FIG. 1) (step S4).
3). (4) Next, the acquired display color data is converted into a main wavelength value, a stimulus purity value, and a luminance value (step S44). Here, the stimulus purity value is a scale indicating how close the stimulus purity value is to the color stimulus for the white monochromatic light stimulus. The dominant wavelength value is the wavelength of the monochromatic light stimulus. For a detailed definition of these stimulus purity values and dominant wavelength values, see, for example, the document “Color Engineering: Noboru Ota, Tokyo Denki University Press, P77-
P78 ", and the detailed description is omitted here. (5) Next, the new stimulus purity is fixed to the maximum value usable in the color display device 11 (step S45). (6) Next, a new luminance value is fixed to the maximum value usable in the color display device 11 (step S46). (7) Next, it is determined whether the complementary color of the display color data is a spectral color or a non-spectral color, and if it is a spectral color, the spectrum locus data stored in the memory 15 based on the definition of the complementary color And the achromatic color point coordinate data, to obtain a complementary color primary wavelength value, and use it as a new primary wavelength value (step S47). (8) Next, when the complementary color of the display color data is a non-spectral color, the non-spectral color at the intersection of the straight line connecting the point representing the display color and the achromatic point on the chromaticity diagram and the red-violet line The color wavelength value is obtained with reference to the spectrum locus data and the achromatic color point coordinate data stored in the memory 15, and this is set as the main wavelength value (step S48). (9) Next, the color of each pixel of the pointer P is generated based on the obtained main wavelength value of each pixel and the new stimulus purity value and luminance value (step S49). (10) Next, it is determined whether or not the pointer position has changed (step S50). If the pointer position has not changed, the process waits for a predetermined time (step S51) and returns to step S50. If the pointer position has changed, the process returns to step S42 to repeat the same processing.

(Embodiment 7) In the first to fourth embodiments, the display color of the outermost pixel among the pixels constituting the pointer is used as the display color of the pixel outside the pointer adjacent to the outermost pixel. Step S6 of FIG. 6 to Step S of FIG.
11 may be generated. Note that step S3 in FIG.
The time interval t used in step S14 and the time interval t2 used in discard S14 of FIG. Further, the operator may input new chromaticity coordinate data (x ′, y ′) in step S10. When the operator makes an input, there is an effect that the response speed can be set arbitrarily and the color of the pointer can be fixed to an arbitrary color.

(Embodiment 8) An apparatus for implementing the above-described pointer display color generation method includes a microprocessor (or processor), a color display device, a pointing device or a joystick, and the output of the color display device. Can be configured as a device having means for projecting the image on a screen larger than the color display device.

In an apparatus or system having such a projection means, by changing the display color of the pointer by the method of the present invention, when a specific portion of the display content is indicated by the pointer on a large screen, the instruction is given. The position can be clearly confirmed. Therefore,
This is extremely effective when conducting a conference or video conference in a large venue.

In addition to the configuration for projecting onto a large screen as described above, the embodiment can be configured by a personal computer having a microprocessor (or a processor), a color display device, a pointing device or a joystick. . In this case, the pointer display color generation method according to the present invention is particularly effective in an environment in which an application program in which the display color of the background image changes with various brightnesses is operating.

The processing procedure of the pointer display color generation method according to the present invention, that is, the processing procedure and the xy chromaticity diagram data shown in the flowchart in each embodiment, is stored in a recording medium such as a floppy disk or a CD-ROM. ,
The program can be recorded and provided as a computer-readable program. A general user loads a program and xy chromaticity diagram data recorded on the recording medium into a memory in a computer and executes the program to display a pointer whose display color changes in real time according to the background color. it can.

[0055]

As described above, according to the present invention, the display color of the pointer can be changed in real time according to the change of the display color at or near the background of the pointer position. As a result, the visibility of the pointer in the color display device can be improved, and an extremely excellent effect is exhibited when the background image is projected on a large screen and a part thereof is pointed by the pointer.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an embodiment of an apparatus for implementing the present invention.

FIG. 2 is a diagram illustrating an example of the shape of a pointer.

FIG. 3 is a diagram illustrating an example of chromaticity diagram data.

FIG. 4 is a diagram showing area divisions when searching for a complementary color-related color of a pointer background color.

FIG. 5 is a flowchart illustrating a procedure of a method according to the first embodiment.

FIG. 6 is a flowchart showing a continuation of FIG. 5;

FIG. 7 is a flowchart showing a continuation of FIG. 6;

FIG. 8 is a flowchart showing a continuation of FIG. 7;

FIG. 9 is a diagram illustrating an example of pointer display according to the first embodiment.

FIG. 10 is a diagram illustrating an example of pointer display according to the third embodiment.

FIG. 11 is a flowchart illustrating a procedure of a method according to a fourth embodiment.

FIG. 12 is a diagram illustrating coordinates on a chromaticity diagram of outermost pixels a and b forming a pair in the method according to the fourth embodiment.

FIG. 13 is a flowchart illustrating a procedure of a method according to a fifth embodiment.

FIG. 14 is a flowchart illustrating a procedure of a method according to a sixth embodiment.

[Explanation of symbols]

1. Personal computer, 11. Color display device,
P pointer, 12 keyboard, 13 pointing device, 14 processor, 15 memory, 16
Display data storage area, 17 pointer position monitoring means, 1
8 ... xy chromaticity diagram data, 19 ... pointer display color generation program.

Continued on front page F-term (reference) 5B087 CC01 CC05 DD06 DE07 5C082 BA34 CA02 CA12 CB01 DA87 MM10 5E501 AA02 BA03 BA06 CA02 CB02 CB09 EA32 FA02 FB28

Claims (16)

[Claims] 1. A method for generating a pointer display color for changing a display color and brightness of a pointer on a display screen of a color display device according to a display color and brightness of a background of the pointer, comprising: A first step of storing spectral locus data on a chromaticity diagram and achromatic color point coordinate data on the chromaticity diagram in a memory; and a second step of acquiring position data of each pixel of the pointer from pointer position monitoring means. And a third step of obtaining display color data of the background of each pixel corresponding to the obtained position data from the background display data storage means; and converting the obtained display color data into a main wavelength value, a stimulus purity value, and a luminance. A fourth step of converting to a value, a fifth step of fixing a new stimulus purity to a maximum value usable in the color display device, and a new luminance value usable in the color display device. A sixth step of fixing the display color data to a maximum value, and determining whether a complementary color of the display color data is a spectral color or a non-spectral color. If the spectral color is a spectral color, the color is stored in the memory based on the definition of the complementary color. A seventh step of obtaining a principal wavelength value of a complementary color with reference to the obtained spectrum locus data and achromatic color point coordinate data and setting this as a new principal wavelength value; and a complementary color of the display color data is a non-spectral color. In the case, the spectrum locus data and the achromatic color point coordinates stored in the memory are the wavelength values of the non-spectral colors at the intersection of the straight line connecting the point representing the display color and the achromatic color point on the chromaticity diagram, and the intersection of the red-violet line. An eighth step of obtaining the color of each pixel of the pointer based on the obtained main wavelength value of each pixel, the new stimulus purity value, and the luminance value. 9 steps A method of generating a pointer display color in color display, wherein the processing of the second step to the ninth step is repeated at predetermined time intervals, and a pointer is displayed with the generated color and brightness of each pixel. 2. The pointer display color generation method for color display according to claim 1, wherein the position data of each pixel of the pointer obtained in the second step is the same as the position data of each pixel of the pointer obtained before the step. In the same case, or when the background display color data of each pixel obtained in the third step is the same as the background display color data of each pixel of the pointer obtained before the step, Without performing the process of step 9, the display using the display color data of each pixel of the pointer generated before that step is continued for a predetermined time, and thereafter,
A method for generating a pointer display color in color display, wherein the processing of the second step is performed. 3. A method for generating a pointer display color for changing a display color of a pointer on a display screen of a color display device according to a display color of a background of the pointer, comprising: a spectrum on an xy chromaticity diagram. A first step of storing locus data and achromatic color point coordinate data on the chromaticity diagram in a memory; and maximum luminance data Ymax usable in the color display device.
A second step of obtaining the position data of each pixel of the pointer from the pointer position monitoring means, and three primary color data constituting a background display color of each pixel corresponding to the obtained position data. A fourth step of acquiring R, G, and B from the background display data storage means; and acquiring the acquired three primary color data R, G, and B as tristimulus values of X,
A fifth step of converting the data into Y and Z data, and referring to the spectrum locus data stored in the memory,
A sixth step of converting the X, Y, and Z data into chromaticity coordinates (x, y), which is coordinate data on a chromaticity diagram; and spectral locus data and achromatic color point coordinate data stored in the memory. To determine whether or not the complementary color of the display color data is a spectral color, based on whether or not a straight line connecting the chromaticity coordinates (x, y) and the achromatic point has an intersection with the spectrum locus. In the case of a spectral color having an intersection, the number of intersections is further examined. If there is one intersection, the coordinates of the intersection are determined. If there are two intersections, the chromaticity coordinates (x, y) are determined with respect to an achromatic point. ) Is defined as new chromaticity coordinates (x ′, y ′). If the color is a non-spectral color having no intersection, the chromaticity coordinates (x, y) and the achromatic color point And the coordinates of the non-spectral color at the intersection of the straight line connecting ', Y'), and converting the new chromaticity coordinates (x ', y') into X ', Z' data of the three stimulus values,
an eighth step in which x is data of new tristimulus values X ', Y', and Z 'as data of Y' among the three stimulus values; and the new tristimulus values X ', Y', and Z ' Is converted into new three primary color data R ′, G ′, B ′, and the converted three primary color data R ′, G ′, B ′ are output as the display colors of the pointers. And a step of repeating the second to ninth steps at predetermined time intervals, and displaying the pointer with the output display color, wherein the pointer display color generation method in color display. 4. The pointer display color generation method for color display according to claim 3, wherein the position data of each pixel of the pointer obtained in the third step is the position data of each pixel of the pointer obtained before the step. Or when the display color data of the background of each pixel obtained in the fourth step is the same as the display color data of the background of each pixel of the pointer obtained before this step, Without performing the processing of the ninth step, the display using the display color data of each pixel of the pointer generated before this step is continued for a predetermined time, and thereafter,
A method for generating a pointer display color in color display, wherein the processing of the third step is performed. 5. The pointer display color generation method for color display according to claim 3 or 4, wherein the processing of the first to ninth steps is applied to an outermost pixel among pixels constituting the pointer, A pointer display color generation method in color display, wherein the display color of pixels inside the pointer excluding the outermost periphery is set to an arbitrary single color set in advance. 6. The pointer display color generation method for color display according to claim 5, wherein a display color of a pixel inside the pointer excluding the outermost periphery is set to one of display color data of a background inside the pointer.
A pointer display color generation method for color display, wherein a single color is determined by performing the processing of the first to ninth steps. 7. The pointer display color generation method for color display according to claim 5, wherein a display color data of a pixel inside the pointer excluding the outermost periphery is determined by determining a symmetry axis of the pointer, and an outermost periphery of the pointer. Determining a pair of pixels at positions symmetrical with respect to the axis of symmetry for all of the pixels
And for all of the outermost pairs of pixels of the pointer,
A step c for generating new chromaticity coordinate data (x ', y') obtained in the fourth to seventh steps according to claim 3, and a pixel of each pair determined in step b on a display screen. New chromaticity coordinate data (x ", y") of the pixel on the connecting straight line
And d) generating the new chromaticity coordinate data of the paired pixels by linearly distributing the new chromaticity coordinate data; and generating the new chromaticity coordinate data (x ″, y ″) with a new 3
Step e for converting into stimulus value X ″, Y ″, Z ″ data
And f) converting the data of the new tristimulus values X ″, Y ″, Z ″ into new data of R ″, G ″, B ″. Display color generation method. 8. The pointer display color generation method for color display according to claim 3, wherein the Y ′ or Y ″ corresponding to a luminance value among the three stimulus values.
And a step a of extracting the minimum luminance value bmin and the maximum luminance value bmax from the luminance values Y _i for each pixel, the steps b to calculate the average value b of the minimum luminance value bmin and the maximum luminance value bmax, each The new luminance value Y _i ′ or Y _i ″ of the pixel is set to bmin when Y _i ′ or Y _i ″ is equal to or larger than b, and b otherwise.
a pointer display color generation method for color display, wherein the method generates the pointer display color in a color display. 9. The pointer display color generation method for color display according to claim 3, wherein a display color of an outermost pixel of an image forming a pointer is adjacent to the outermost pixel. 4. A pointer display color generation method in color display, wherein the display color is generated by using the display colors of pixels outside the pointer to be displayed according to the fifth to eighth steps. 10. The pointer display color generation in color display according to claim 3, wherein the predetermined time interval is a value input by an operator. Method. 11. The pointer display color generation method for color display according to claim 3, wherein the operator inputs new chromaticity coordinate data (x ′, y ′) in the seventh step. A pointer display color generation method in color display, characterized by using a value. 12. An apparatus for changing the display color and brightness of a pointer on a display screen of a color display device in accordance with the display color and brightness of a background of a pointer, and displaying the xy chromaticity diagram. First means for storing in the memory the spectrum locus data and the achromatic color point coordinate data on the chromaticity diagram, and second means for acquiring the position data of each pixel of the pointer from the pointer position monitoring means. Third means for acquiring display color data of the background of each pixel corresponding to the acquired position data from the background display data storage means, and converting the acquired display color data into a main wavelength value, a stimulus purity value, and a luminance value. A fourth means for fixing a new stimulus purity to a maximum value usable in the color display device, and a fifth means for fixing a new luminance value to a maximum value usable in the color display device. 6 means and before It is determined whether the complementary color of the display color data is a spectral color or a non-spectral color.If the color is a spectral color, the spectral locus data and the achromatic color point coordinate data stored in the memory are determined based on the definition of the complementary color. A seventh means for obtaining a main wavelength value of a complementary color by referring to the new main wavelength value, and representing a display color on a chromaticity diagram when a complementary color of the display color data is a non-spectral color. The straight line connecting the point and the achromatic point, and the wavelength value of the non-spectral color at the intersection of the red-violet line is determined by referring to the spectrum locus data and the achromatic point coordinate data stored in the memory, and this is calculated as the principal wavelength value. Eighth means, and a color of each pixel of the pointer is generated based on the obtained dominant wavelength value of each pixel and the new stimulus purity value and luminance value, and a pointer is generated based on the generated color and brightness of each pixel. And ninth means for displaying Pointer display color generating device comprising and. 13. A color display device comprising: a processor; a color display device; a pointing device or a joystick for operating a pointer position; and means for projecting a display image of the color display device on a screen larger than the color display device. First means for operating in the processor, storing spectrum locus data on an xy chromaticity diagram and achromatic color point coordinate data on the chromaticity diagram in a memory; Second means for acquiring from the position monitoring means, third means for acquiring display color data of the background of each pixel corresponding to the acquired position data from the background display data storage means, and mainly acquiring the acquired display color data. A fourth means for converting into a wavelength value, a stimulus purity value and a luminance value; and a new stimulus purity being a maximum value usable in the color display device. Fifth means for fixing, sixth means for fixing a new luminance value to a maximum value usable in the color display device, and whether a complementary color of the display color data is a spectral color or a non-spectral color Is determined, and if the color is a spectrum color, the principal wavelength value of the complementary color is obtained by referring to the spectrum locus data and the achromatic point coordinate data stored in the memory based on the definition of the complementary color, and this is calculated as a new principal wavelength. A seventh means for determining a value, and, when the complementary color of the display color data is a non-spectral color, an intersection of a straight line connecting a point representing the display color on the chromaticity diagram and an achromatic point, and a red-violet line Eighth means for determining the non-spectral color wavelength value by referring to the spectrum locus data and the achromatic color point coordinate data stored in the memory, and using this as the main wavelength value; With the new stimulus purity value and brightness value, 9. A display system, comprising: a pointer display color generation unit including: a ninth unit that generates a color of each pixel of a pointer and displays the pointer with the generated color and brightness of each pixel. 14. A processor to which a color display device and a pointing device or a joystick for operating a pointer position are connected, and which operates in the processor, and which stores spectrum locus data on an xy chromaticity diagram and a spectrum locus data on the chromaticity diagram. First means for storing color point coordinate data in a memory; second means for obtaining position data of each pixel of the pointer from the pointer position monitoring means; and a background of each pixel corresponding to the obtained position data. Third means for acquiring display color data from background display data storage means, fourth means for converting the acquired display color data into a main wavelength value, a stimulus purity value, and a luminance value; Fifth means for fixing the maximum value usable in the color display device, and sixth means for fixing a new luminance value to the maximum value usable in the color display device. Determine whether the complementary color of the display color data is a spectral color or a non-spectral color, and if it is a spectral color, based on the definition of the complementary color, the spectrum locus data and the achromatic point coordinate data stored in the memory And a seventh means for obtaining a principal wavelength value of a complementary color with reference to the above, and using this as a new principal wavelength value. If the complementary color of the display color data is a non-spectral color, the display color on the chromaticity diagram is The straight line connecting the point to be represented and the achromatic point, and the wavelength value of the non-spectral color at the intersection of the red-violet line is determined by referring to the spectrum locus data and the achromatic point coordinate data stored in the memory, and this is calculated as the main wavelength. Eighth means for calculating a value, a color of each pixel of the pointer is generated based on the obtained dominant wavelength value of each pixel, the new stimulus purity value and the luminance value, and a color and brightness of each generated pixel are obtained. Ninth means for displaying a pointer. And a pointer display color generating means. 15. A computer which records a program for generating a pointer display color for changing a display color and brightness of a pointer on a display screen of a color display device according to a display color and brightness of a background of the pointer. A readable storage medium, comprising: a first step of storing in a memory spectral locus data on an xy chromaticity diagram and achromatic point coordinate data on the chromaticity diagram; and position data of each pixel of the pointer. A second step of acquiring from the pointer position monitoring means, a third step of acquiring from the background display data storage means the background display color data of each pixel corresponding to the acquired position data, and the acquired display color data And a fifth step of fixing the new stimulus purity to the maximum value usable in the color display device. A sixth step of fixing a new luminance value to a maximum value usable in the color display device; and determining whether a complementary color of the display color data is a spectral color or a non-spectral color. If the color is a color, the main wavelength value of the complementary color is determined based on the definition of the complementary color with reference to the spectrum locus data and the achromatic color point coordinate data stored in the memory, and this is set as a new main wavelength value. When the complementary color of the display color data is a non-spectral color, a straight line connecting the point representing the display color and the achromatic point on the chromaticity diagram, and the non-spectral color at the intersection of the red-violet line Eighth step in which the wavelength value is obtained by referring to the spectrum locus data and the achromatic color point coordinate data stored in the memory, and this is used as the main wavelength value; the obtained main wavelength value of each pixel and the new stimulus purity Value and brightness value A ninth step of generating a color for each pixel of the pixel, and repeating the processing from the second step to the ninth step at predetermined time intervals, and setting a pointer to the color and brightness of each generated pixel. A recording medium characterized by recording a program for displaying the information. 16. A computer-readable recording medium storing a program for generating a pointer display color for changing a display color of a pointer on a display screen of a color display device according to a display color of a background of the pointer. A first step of storing in a memory spectral locus data on an xy chromaticity diagram and achromatic point coordinate data on the chromaticity diagram; and maximum luminance data Ymax usable in the color display device.
A second step of obtaining the position data of each pixel of the pointer from the pointer position monitoring means, and three primary color data constituting a background display color of each pixel corresponding to the obtained position data. A fourth step of acquiring R, G, and B from the background display data storage means; and acquiring the acquired three primary color data R, G, and B as tristimulus values of X,
A fifth step of converting the data into Y and Z data, and referring to the spectrum locus data stored in the memory,
A sixth step of converting the X, Y, and Z data into chromaticity coordinates (x, y), which is coordinate data on a chromaticity diagram; and spectral locus data and achromatic color point coordinate data stored in the memory. To determine whether or not the complementary color of the display color data is a spectral color, based on whether or not a straight line connecting the chromaticity coordinates (x, y) and the achromatic point has an intersection with the spectrum locus. In the case of a spectral color having an intersection, the number of intersections is further examined. If there is one intersection, the coordinates of the intersection are determined. If there are two intersections, the chromaticity coordinates (x, y) are determined with respect to an achromatic point. ) Is defined as new chromaticity coordinates (x ′, y ′). If the color is a non-spectral color having no intersection, the chromaticity coordinates (x, y) and the achromatic color point And the coordinates of the non-spectral color at the intersection of the straight line connecting And (7) converting the new chromaticity coordinates (x ', y') into data of X ', Y', Z 'among the three stimulus values, An eighth step in which the data Ymax is set as data of new tristimulus values X ', Y', and Z 'as data of Y' among the three stimulus values; and the new tristimulus values X ', Y', and Z are set. Is converted into new three-primary-color data R ', G', B ', and the converted three-primary-color data R', G ', B' are output as display colors of the pointers. And a step of repeating the second to ninth steps at predetermined time intervals, and displaying a pointer in an output display color.