JPH0526729A - Colorimeter display device - Google Patents

Abstract

PURPOSE:To obtain a colorimeter display device which enables a color attribute of an object to be measured to be displayed clearly even if the number of objects to be measured is increased. CONSTITUTION:An operation means for comparing a measurement value of a color attribute of an object to be measured with a reference value and then calculating the difference by adding positive and negative signs and a display means for displaying a difference at a certain distance in horizontal direction for each object to be measured according to positive and negative signs with a reference line as a center are provided. With this kind of configuration, the color difference is displayed at upper and lower portions according to the positive and negative signs with a reference value as a center at a certain distance for each object to be measured, thus enabling the color difference to be evaluated at a glance and a number of comparison evaluations to be made since data of the object to be measured do not overlap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color measuring and displaying device, and more particularly to a color measuring and displaying device for measuring and displaying a color attribute of lightness, hue or saturation of an object to be measured.

[0002]

2. Description of the Related Art Generally, a color has a lightness that represents the brightness of the color,
There are three attributes: hue representing hue and saturation representing color vividness. When obtaining the color attribute of the object to be measured (comparative sample), the difference from the reference value of the color attribute of the reference object is obtained and displayed. In order to display the attribute of the conventional color, as shown in FIG. 4, the color difference enlarged view and the color deviation determination diagram shown in the Lab chromaticity diagram are used. L represents the lightness, with the brightest value centering on zero at the uppermost position and the darkest value at the lowermost position. Further, the circumferential direction of the Lab coordinate indicates a hue, and along the circumference, red (R), yellow (Y), yellow-green (GY), green (G), blue (B), purple (P).
The hue such as is displayed. Further, the radial direction of the Lab coordinate indicates the saturation, and the vividness of the color disappears at the center N of the circle (achromatic color), while the vividness is highest at the circumference.

In this case, the reference value (T) is located at the center of the circle, so the lightness is at the zero position of the lightness line L, and the hue and saturation are at the center of the circle. Further, the isochromatic line is an extension line from the achromatic direction, and the isochromatic line is 9 with respect to the isochromatic line.
Appears in the 0 ° direction.

[0004]

In such a conventional color difference display, for example, when the object to be measured S1 is located in FIG. 4, the difference in color attribute from the reference value T is determined as follows.
That is, the brightness difference becomes brighter because the measured object S1 is above the zero position, and the hue difference becomes yellow-red because it is in the yellow-red direction with respect to the equal hue line, and the saturation difference becomes It is evaluated as vivid because it is in a bright direction with respect to the iso-saturation line.

As described above, in the conventional display method, the color misregistration (color difference) is judged by dividing it into the elements of lightness, hue and saturation, so that the view is complicated. It becomes complicated and hard to see.

Therefore, the present invention has been made in order to solve such a conventional drawback, and it is possible to clearly and easily display the color attribute of the measured object even if the number of measured objects becomes large. An object of the present invention is to provide a simple color measurement display device.

[0007]

In order to solve such a problem, the present invention provides a measuring means for measuring each color attribute of lightness, hue or saturation of an object to be measured, and a reference value for each color attribute. Setting means for setting, calculating means for comparing the reference value of each color attribute and the measured value of the color attribute of the object to be measured, and adding the positive and negative signs to the difference, and a constant interval in the lateral direction for each object to be measured. A configuration is adopted in which display means for displaying the difference above and below the reference line centered on the reference line according to positive and negative signs is provided.

[0008]

In such a structure, each object to be measured is laterally separated for a certain period and the difference between the color attribute of the object to be measured and the reference value is displayed above and below the reference value in accordance with the positive and negative signs. Therefore, the color difference can be evaluated at a glance, and since the data of the measured objects do not overlap, a large number of comparative evaluations can be performed.

In the case where the difference between the reference value and the brightness, hue, and saturation of the object to be measured is laterally separated by a certain distance in the lateral direction, the difference between the reference value and the reference value is displayed above and below in accordance with the positive and negative signs.
It is not necessary to distinguish hue difference and saturation difference from iso-hue line and iso-saturation line, and they can be seen by each element, and the displacement of each measured object can be clearly seen even if many comparisons are made at once. can do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings.

In FIG. 1, a color measuring circuit 10 measures each color attribute of lightness, hue and saturation of an object to be measured, and a setting circuit 11 sets a reference value for each color attribute. The reference value is located at the center of the circle on the Lab chromaticity diagram, so the lightness is at the zero position on the lightness line L, and the hue and saturation are at the center of the circle. The measured value and the reference value of each color attribute of the object to be measured are input to the arithmetic circuit 12 and are arithmetically operated with the difference being given a positive or negative sign. The calculation result is temporarily stored in the storage circuit 13 for each measured object. The value stored in the storage circuit 13 is read for each object to be measured and displayed on the display device 14.

This display device 14 includes a horizontal axis setting circuit 14a for setting a reference value on the horizontal axis and a setting circuit 14 for setting a difference between color attributes on the vertical axis and the vertical axis on the horizontal axis according to positive and negative signs.
b, and means 14c for shifting the color attribute difference for each object to be measured along the horizontal axis.

The color difference between the measured value and the reference value of each color attribute of the object to be measured calculated by the calculation circuit 12 is usually the L'a'b 'chromaticity diagram (wherein' has a hue equal to that of the Lab chromaticity diagram). ΔL ', ΔH', ΔC ', ΔE obtained by chromaticity diagram which is the interval)
Required by. ΔL ′ is the difference between the lightness of the reference color (T) and the comparative color (S) as shown in FIG. 2, and ΔH ′ is the difference between the hue of the reference color and the comparative color, expressed as D * 100/180. To be done. ΔC 'is the chromaticity difference between the reference color and the comparison color (SN'
-TN ') * 100/120 However, S
N'TN 'indicates the distance between SN and TN. ΔE is Δ
It is represented by the square root of the sum of the square of L ′, the square of Δa ′, and the square of Δb ′.

The color attributes calculated in this manner are temporarily stored in the storage circuit 13 for each object to be measured, and subsequently read out and sent to the display circuit 14 for display. An example displayed by the display circuit 14 is shown in FIG. In FIG. 3, the calculated brightness difference, hue difference, saturation difference, and color difference are horizontally separated for each object to be measured (sample number), and are displayed above and below in accordance with positive and negative signs centered on the reference value. There is.

The reference center line may be a first measurement value, a selected measurement value, an average value of a plurality of measurement values, or the like. In the example of FIG. 3, the first measurement value is the center line. Further, in FIG. 3, the maximum value (M
AX) and minimum value (MIN) have been calculated and are displayed along with their sample number. It is also possible to obtain the average value of the whole and display it. Also, set the allowable value for each color difference, and give a warning when the allowable value is exceeded,
It is also possible to exclude it from the average value calculation.

[0016]

As described above, according to the present invention, measuring means for measuring each color attribute of lightness, hue or saturation of an object to be measured, setting means for setting a reference value of each color attribute, and each color attribute Computation means for comparing the reference value and the measured value of the color attribute of the object to be measured and computing the difference with positive and negative signs, and for each object to be measured, the difference is separated by a certain distance in the lateral direction to form a reference line. By adopting a configuration in which a display means for displaying vertically according to positive and negative signs is provided in the center, it is possible to easily evaluate the color difference at a glance, and it is possible to perform a large number of comparative evaluations because the data of the measured objects do not overlap. . In addition, when displaying the difference between lightness, hue, and saturation and the reference value above and below for each measured object according to the positive and negative signs, the hue difference and the saturation difference are the same hue line and the equal saturation. It is not necessary to distinguish and re-examine from the line, and each element can be seen, and even if a large number of comparisons are performed at one time, the displacement of each measured object can be clarified.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a device of the present invention.

FIG. 2 is an explanatory diagram showing coordinate positions of a target color and a comparative color on the Lab chromaticity diagram.

FIG. 3 is a display diagram showing a color difference for each object to be measured.

FIG. 4 is an explanatory diagram illustrating a conventional display of color difference for each measured object.

[Explanation of symbols]

10 Measuring circuit 11 Setting circuit 12 arithmetic circuit 13 Memory circuit 14 Display circuit

Claims (3)

[Claims] 1. A measuring means for measuring each color attribute of lightness, hue or saturation of an object to be measured, setting means for setting a reference value of each color attribute, reference value of each color attribute and color of the object to be measured. Computation means for comparing the measured values of the attributes and computing the difference with positive and negative signs, and for each object to be measured, it is separated in the horizontal direction for a certain period and the difference is displayed above and below the reference line according to the positive and negative signs. A color measurement display device, comprising: a display means. 2. The display means, means for setting a reference value on the horizontal axis, means for setting the difference between the color attributes on the vertical axis based on the horizontal axis according to positive and negative signs, and for each object to be measured. 2. The color measurement display device according to claim 1, further comprising means for shifting the difference in color attribute along the horizontal axis. 3. The color measurement display according to claim 1, wherein the difference calculated for each object to be measured is stored in the storage means, and the stored difference is read out and displayed for each object to be measured. apparatus.