JPH0130093B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for measuring color information for photography, a so-called color meter.

Problems to be solved by conventional technology/invention Conventionally, in the color meter as described above,
Calculations are performed based on photometric values and set values set from the outside. If all such calculated values and setting values are displayed in the same way, the display format becomes complicated and the display becomes difficult to see. Also, if you change the set value while the calculated value is displayed, the displayed calculated value may also change, so it is possible to misunderstand the displayed calculated value as the set value and perform an erroneous operation. There is also gender.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks and provide a color measuring device for photography in which the display is easy to see and the possibility of erroneous operation of the operating members is reduced.

Means for Solving the Problems In order to achieve the above object, a color measuring device for photography according to the present invention includes a photometric means for outputting a plurality of pieces of information regarding colors, and a digital method for outputting a plurality of pieces of photometric information regarding these colors. Convert to photometric data A
- a D conversion means, a photographing information changing means for changing photographing information related to photographing based on a manual operation, and a storage means for electrically storing the changed photographing information;
A calculation means that performs calculations based on the photometric data and the photographic information stored in the storage means, and is capable of selectively displaying the calculation results obtained by the calculation and the photographic information stored in the storage means. a display means, a display selection means for selecting whether the display means displays a calculation result or photographing information, and a display selection means for selecting whether the calculation result is displayed on the display means, and a display selection means for changing the storage contents of the storage means when the calculation means is displayed on the display means. The invention is characterized in that it has a memory change prohibition means for prohibiting the change of memory.

According to the present invention, the calculation results and the photographing information changed and stored by manual operation are selectively displayed by the display means, and the photographing information is prohibited from being changed while the calculation results are displayed. .

Embodiment FIGS. 1 and 2 show an embodiment of the color meter of the present invention, with FIG. 1 showing a circuit block diagram and FIG. 2 showing its appearance. The display means 100, which is composed of a 3-digit 7-segment display element and a lower 2-digit auxiliary zero display element, is used to display setting information and calculation information. L _S , C _S ,
K _S and F _S are selection switches that specify the amount to be displayed by the display means 100, and when one of the buttons is closed by pressing the button, one of the corresponding terminals 101 to 104 is closed. The memory logic circuit 105 becomes “high” and the others become “low”.
It is combined with 106 is a display switching terminal, which becomes "high" when any one of terminals 101, 102, and 103 is "high";
The display means 100 is controlled to display the calculation result inputted from the calculation circuit 108 via 7. On the other hand, when the switch F _S is closed and the terminal 104 becomes "high", the terminals 101, 102, 103
3 all become "low", the display switching terminal 106 also becomes "low", and at this time, the display means 10
0 is presettable Up- via terminal 109
The setting information input from the Down counter 110 is controlled to be displayed. This setting information is the color temperature characteristic of the film, and once it is set, it does not need to be changed until the film is replaced.
It is used to display the setting information at 0, and to display the measurement calculation results at 108 in normal use.

Next, the operation of the embodiment shown in FIGS. 1 and 2 will be explained in detail. When the power switch (not shown) is turned on, the terminal 104 becomes "high" and the terminals 101, 102, 103
becomes “low”. As a result, the display means 100 displays the contents of the presettable up-down counter, making it possible to confirm the setting information. S _S is the film color temperature characteristic selection switch, (B), (A),
When set to either (D), the value determined in advance depending on the film type is set to preset means 1.
11 and determines the contents of 110.
When the settings are changed between (B), (A), and (D), the contents of 110 also change accordingly, and this situation can be monitored by the display means 100. Also, when S _S is set to (V), terminal 112 becomes “high” and
The pulse when the switch U _S or _{D S} is closed passes through the AND gates 113 and 114 and can be input _to 110,
The contents of 10 can be changed arbitrarily. This situation can of course be monitored by the display means 100. Note that the selection results of (B), (A), (D), and (V) by S _S are displayed by the selection display means 115.
When the terminal 104 is "high", the display element 116 indicates that the color temperature characteristics of the film are displayed, and the display means 117 indicates the unit "K".
is lit.

After confirming or changing the settings, switch L _S ,
When one of C _S and K _S is closed, one of the corresponding terminals 101, 102, and 103 becomes "high" and terminal 104 is reset and becomes "low". As a result, the preset means 11
The transmission of signals from the 1 and AND gates 113 and 114 to the presettable up-down counter 110 is prohibited, and the contents of 110 cannot be changed. Further, since the terminal 106 becomes "high", the display means 100 starts displaying the contents of the arithmetic circuit 108. Depending on which of the terminals 101, 102, and 103 is "high," the mode of calculation in 108 is specified, and correspondingly, one of the calculation mode display elements 118, 119, and 117 lights up. When the photometry switch M _S is closed in this state, a calculation is performed according to the specified calculation mode from the digital measurement value signal input from the A-D converter 120 and the digital setting value signal input from the A-D converter 110. , the results are input to the display means 100.

The quantities measurable by the color meter are explained below. Photometric means 121
outputs the intensity ratio (Mb) of blue (B) and red (R) from output terminal 122, and outputs green (G) and red (R) from terminal 123.
Outputs the intensity ratio (Mg) of Multiplexer 1
24 sends this to the A/D converter 120 in time division under the control of the timing controller 125.
The A/D converter 120 performs A/D conversion on this in a time division manner under the control of the timing controller 125, and sends the result to the arithmetic circuit 108 for storage. When the switch L _S is closed and the terminal 101 is "high", the calculation mode is the LB (write balancing factor) calculation mode, and the above (Mb) and the output from the presettable up-down counter 110 are output from the presettable up-down counter 108. (Mb−Mf) between the film color temperature characteristics (Mf) stored in
Perform the calculation. Switch C _S is closed and terminal 10
When 2 is “high”, the calculation mode is CC (color compensating factor) calculation mode, and (Mg−
Mb). Further, when K _S is closed and the terminal 103 is "high", the calculation mode is a mode for calculating the color temperature of the light source, and the calculation of (10 ⁶ /Mb) from the above (Mb) is performed. The timing controller 125 starts operating when the photometry switch M _S is closed or opened, and controls the A-D conversion as described above, as well as the timing control of calculations.

Effects of the Invention As described above, the present invention provides a photometric means for outputting a plurality of pieces of information regarding colors, an A-D conversion means for converting a plurality of pieces of photometric information regarding these colors into digital photometric data, and a photographic method for photographing. Photographing information changing means for changing information based on manual operation;
A storage means for electrically storing changed photographic information, a calculation means for performing calculations based on the photometric data and the photographic information stored in the storage means, and a calculation result obtained by the calculation and stored in the storage means. a display means capable of selectively displaying the calculated photographic information; a display selection means capable of selecting whether the display means displays the calculation result or the photographing information; It is characterized by having a memory change prohibition means for prohibiting the change of the memory contents of the memory means when the result is displayed, and with this configuration, it is possible to prevent the calculation result from being changed by manual operation. The photographing information that has been changed and stored is selectively displayed by the display means.
A single display means can be used to display multiple pieces of information to prevent complicated displays and make the display easier to read.Also, changing the shooting information is prohibited while the calculation results are being displayed, so the user can It is possible to reduce the possibility of a malfunction in which a calculated value that has been set is mistakenly recognized as a set value and the set value is changed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a color meter according to an embodiment of the present invention, and FIG. 2 is an external view thereof. 121...Photometering means, 120...A-D conversion means, _US , D _S ...Photography information changing means, 110...
Storage means, 108... Calculation means, 100... Display means, 105, 106... Display selection means, 10
4,113,114...Memorization change prohibition means.

Claims (1)

[Scope of Claims] 1. Photometric means for outputting a plurality of pieces of information regarding colors; A-D converting means for converting the plurality of pieces of information regarding these colors into digital photometric data; and Photographic information regarding photography based on manual operation. a storage means for electrically storing the changed photographic information; a calculation means for performing calculations based on the photometric data and the photographic information stored in the storage means; a display means capable of selectively displaying calculated calculation results and photographing information stored in the storage means, and selecting whether the display means displays the calculation results or the photographing information. 1. A color measuring device for photographing, comprising a display selection means and a memory change prohibition means for prohibiting changes in the stored contents of the storage means when a calculation result is displayed on the display means. 2. The arithmetic means is capable of performing a plurality of types of arithmetic operations, and is characterized in that it is equipped with an operation type designation means for specifying the type of operation of the arithmetic means.
A color measuring device for photography according to claim 1. 3. Color for photography according to claim 1 or 2, characterized by having means for displaying whether what is displayed by the display means is a calculation result or photography information. measuring device. 4. The photographing information stored in the storage means is information regarding the color temperature of the imaging means, and the calculation means is further characterized in that it is possible to calculate a light balancing factor and a color compensating factor. A color measuring device for photography according to claim 2 or 3.