JPS61267749A - Controlling method for photographic system - Google Patents

Abstract

PURPOSE:To execute proper control and management appropriate to a current state by analogically controlling a photographic system on the basis of weighting average photographic characteristics obtained by changing the importance of the photographic characteristics as the function of time. CONSTITUTION:After executing the photometry 1 of a film by using an image sensor or the like, the kinds of films are sorted 2 on the basis of sort information to accumulate a photographic characteristic value -D, and if the number N of accumulated values is <2,000, arithmetic processing 3 is executed on the basis of an average value Dx found from the accumulated data of all the films. When the number of data is >2,000, an average characteristic value found from the accumulated data of each film is used as the value of photographic printing control 4 without using the stored value of the average value Dx of all the films. If 100 films in each sort are treated in a day (about 2,000 data/day), weighting is changed in the period of 10 days if the upper limit is 40,000 and the lower limit is 20,000. Consequently, the variation of film development, seasonal variation, etc. are sequentially traced to find out the quantity of variation and control the photographic system on the basis of these variation.

Description

Detailed Description of the Invention (Technical Field of the Invention) This invention relates to a control management method for a photographic system that accurately detects and controls temporally varying photographic characteristics (development processing characteristics, photographic printing condition characteristics, etc.). Regarding.

(Technical background of the invention and its problems) Control factors for photographic systems include those whose conditions can be accurately grasped through simple measurements (for example, fluctuations in the printer light source, etc.)
In addition, there are photographic characteristics that involve many other factors (development processing characteristics, photographic printing condition characteristics, image reproduction characteristics, etc.)0 For example, development processing characteristics are used to measure characteristics in addition to the characteristics of the processing solution itself. It is measured including all variations in the performance of the photographic material (usually control film), changes over time, and changes in the density measuring device. In addition to the above-mentioned development processing characteristics, photographic printing conditions also include the characteristics of the film to be printed, the subject, the photographic light source, and various printer properties, and proper printing cannot be achieved until these factors are comprehensively considered. Conditions are controlled and managed.Normally, these controls and management are carried out by one person's experience and intuition, or by using a measuring instrument, but human involvement is required, and it is not always possible to maintain a high level of accuracy. It is desirable that these controls and management be carried out automatically, but in order to do so, it is necessary to quantitatively observe the current situation to be controlled without human involvement. .

Since it is difficult to measure and manage each of these fluctuation factors in photographic characteristics individually, it is effective to control by a small number of values that can grasp the situation by integrating these fluctuations, or a small number of values that have a high correlation with the fluctuations. It is.

(Object of the invention) This invention was made under the above circumstances,
An object of the present invention is to provide a control and management method for a photographic system that estimates d based on data up to the present time for photographic characteristics that gradually change over time, and performs appropriate control and management in accordance with the current situation. It is in.

(Summary of the Invention) The present invention relates to a method for controlling and managing a photographic system, in which the photographic characteristics of the photographic system are measured over time, #ML is determined, and the importance of the photographic characteristics is changed as a function of time. Based on the weighted average photographic characteristics obtained,
This system is designed to analogically control and manage the photographic system described in L.

(Embodiment of the Invention) Which invention relates to a photographic system that changes over time, and weighting obtained by measuring and accumulating the photographic characteristics of the system over time and changing the importance of the photographic characteristics as a function of time. The photographic system is controlled based on average photographic characteristics. That is, the photographic characteristics of a certain period of time (for example, 1 day, 10 days, etc.) or a certain amount (for example, 1000 frames) are positively weighted, and the farther from the current moment the smaller the weighting, and based on these weighted moving average photographic characteristics. Control. or.

A photographic characteristic over a certain period of time or a certain amount is the average value of individual photographic characteristics over a defined range (e.g., time, amount), and further photographic characteristics are stored for a certain period of time or a certain amount to obtain a weighted average photographic characteristic. In this case, it is also possible to calculate by changing the weighting each time it is memorized, or by weighting the photographic characteristics for a certain period of time or a certain amount, and sequentially updating the average value or added value. Alternatively, the weighting of photographic characteristics at each time may be changed as shown in FIG. 1. In this case, the weighted average value up to M is multiplied by a weighting coefficient W (W<1.0). The weighting is updated by adding the average value of (N+1).

In addition, as shown in FIG. 2, the accumulation side aN of photographic characteristic values is set in the range of upper limit NO and lower limit N [with respect to time, and when the number of data reaches the upper limit NU, it is converted to the upper limit NL, If the added value and the number of data are memorized, when the number of data reaches the upper limit NU, the added value and the number of data may be restarted from that value by n times (if n<1, ≠0 )
Restart from the new value. An average value may be stored instead of the added value, that is, the average value is A and the number of data is N.
If the current photographic characteristics are A and closed.

A” (A 11N+Ao)/(N+1)N=N+1, and when the number N reaches the upper limit Nυ, N=NL
It begins as .

Here, N1=N1en, and n is a positive number smaller than 1 (for example, 1/2.2/3...).

FIG. 3 shows another method of determining weighting coefficients. The current state is estimated using a weighted moving average in which past data is weighted relatively lower than data close to the present.

FIG. 4 shows an example of determining the average characteristic value of a film. Following photometry 1 of film using an image sensor etc., classification 2 (A,
B,...N) L photographic characteristic values are accumulated, but if each accumulation side aN is smaller than 2000, calculation processing 3 is performed using the average value DX obtained from the accumulated data of all films, and the number of each data is If it is 2000 or more, the average value of all films O
The stored value of X is not used, but the average characteristic value determined from the accumulated data of each film is used as the value of control 4 for photographic printing. For example, 100 per day per type of film.
When processing books (approximately 2000 data/day), the upper limit is 40
000 and the lower limit is set as 20000, the weighting is changed every 10 days. In addition, it is best to change the upper and lower limits depending on the processing amount for each film type.This makes it possible to successively track changes in film development, seasonal changes, etc., find the amount of change, and control based on that. It is. In control based on the average value of a large number of data, for example, the contribution of one piece of data at the 1000th frame to the control is different from the contribution of one piece of data at the 100000th frame, and the contribution of one piece of data at the 1000th frame is different. The paradox is that although the average value is highly accurate, it is useless as data for estimating the current situation.In other words, it takes a long time to accumulate a large amount of data, but the more past the present time, the more accurate the current situation becomes. It will no longer be reflected.

The present invention solves this contradiction by using a 1-weighted moving average value.

In FIG. 4, for example, when controlling the baking conditions, the average characteristic value is the average LATD (Large Area D).
mittance Density), and the calculation process is to calculate the difference between the reference LATD and the calculated average LATD.

This indicates that the development characteristics have changed by the LATD difference from the standard value, and the printing conditions can be changed to correct this difference.Also, in order to normalize the characteristic curves that differ depending on the film type, calculation processing is required. is the calculation of normalization conditions. If the number of data is 2000 or less, a pre-stored initial value may be used. For this purpose, an initial value input means may be provided.

FIG. 5 shows an example of addition and initialization in a flowchart.

That is, the photometric values D and T of each frame are determined by photometry using an image sensor (step S1), and the density value D° and the number N are added (step S2), and such photometry is performed for one film. (Step S3) for a fixed number of images.

After photometry is performed for , an addition process is performed using the average value A and the number N stored in the memory (step 54).The 0 number N is a predetermined upper limit value Nu1. : If not, the average value and number are stored in the memory as they are in step S5. S8), if the upper limit value Nu has been reached, the number is changed to the lower limit value NL and stored (step 5).
III, S8), and the above-mentioned processing is repeated until the measurement is stopped (step S7).The data stored in the memory is used to replace the current tn physical solution, change the film type,
It becomes necessary to erase the image due to a malfunction of the photometry system or printer. Therefore, it is preferable to have a means for erasing stored data or returning it to the initial value by inputting from the outside.

As another use for determining photographic printing conditions, it can be used, for example, to determine coordinate points or coordinate areas on the color coordinates of tungsten light photography film, to determine collection results on the color coordinates, and furthermore, it can be used for density correction. It can also be used to find optimal conditions from correction and modification trends such as color correction trends and color correction trends. Furthermore, it can be applied to detecting and correcting deterioration over time and various fluctuations in the display device and output device of the image measuring device 1. FIG. 6(A) shows the clip progress of the number of data, and FIG. 6(El) shows an example of the weighting coefficient of the past data at the present time corresponding to this.

(Effects of the Invention) As described above, according to the method of the invention, the current state of photographic characteristics that change over time is estimated and weighted using data up to the present time, so appropriate control and management suitable for the current state can be carried out. It becomes possible to do so.

[Brief explanation of the drawing]

FIGS. 1 to 3 are diagrams for explaining examples of the method of this invention, FIG. Flowchart shown in FIG. 6(A)
and (B) are diagrams for explaining the use for determining photo printing conditions. 1...Photometry, 2...Film species classification 1.3...
- Arithmetic processing, 4... Control. Applicant's agent Yu Yasugata third! Figure also 2 Figure time 5th

Claims (3)

[Claims] (1) Measuring and accumulating the photographic characteristics of the photographic system over time, and estimating the photographic system based on the weighted average photographic characteristics obtained by changing the importance of the photographic characteristics as a function of time. A method for controlling and managing a photographic system, characterized in that the control and management is performed in a controlled manner. (2) Control management of the photographic system according to claim 1, wherein the weighted average photographic characteristics are positively weighted for a certain period of time or a certain amount of photographic characteristics, and are decreased as time passes. Method. (3) The photographic system according to claim 1, wherein the weighted average photographic characteristics are weighted for a certain period of time or a certain amount of photographic characteristics, and the average value or the added value is sequentially updated. control management method.