Method for determining exposure amount in image copying apparatus

Claim 1

A method for determining exposure amount in an image copying apparatus, comprising the steps of: determining tricolor photometric data by dividing a color film with images recorded thereon into a plurality of segments and by photometrically measuring said segments; determining tricolor corrected photometric data by correcting said tricolor photometric data with photometric data on a low-density portion of the color film including a an image-recorded portion thereof; determining tricolor normalized data by normalizing said tricolor corrected photometric data by transforming said tricolor corrected photometric data in accordance with a predetermined condition of transformation; classifying said tricolor normalized data by comparing said tricolor normalized data with a reference value; selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data; and determining the exposure amount on the basis of an average value of said tricolor photometric data selected.

Claim 2

A method for determining exposure amount in an image copying apparatus, comprising the steps of: determining tricolor photometric data by dividing a color film with images recorded thereon into a plurality of segments and by photometrically measuring said segments; determining tricolor corrected photometric data by correcting said tricolor photometric data with photometric data on a low-density portion of the color film including a an image-recorded portion thereof; determining tricolor normalized data by normalizing said tricolor corrected photometric data by transforming said tricolor corrected photometric data in accordance with a predetermined condition of transformation; classifying said tricolor normalized data by comparing said tricolor normalized data with a reference value; selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data; and determining the exposure amount on the basis of an average value of said tricolor photometric data selected.

Claim 8

A method for determining exposure amount in an image copying apparatus, comprising the steps of: determining tricolor photometric data by dividing a color film with images recorded thereon into a plurality of segments and by photometrically measuring said segments; determining tricolor corrected photometric data by correcting said tricolor photometric data with photometric data on a low-density portion of the same color film including an image-recorded portion thereof; determining tricolor normalized data by normalizing said tricolor corrected photometric data by transforming said tricolor corrected photometric data in accordance with a predetermined condition of transformation; classifying said tricolor normalized data by determining to which of a plurality of divided regions on a predetermined coordinate said tricolor normalized data belongs; selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data and an operational mode of said image copying apparatus, wherein a weighted average value of the average value of said tricolor photometric data selected and of the tricolor data corresponding to said specific color on said coordinate is calculated by changing the weight in correspondence with the operational mode of said image coping apparatus, and the exposure amount is calculated on the basis of said weighted average value; and determining the exposure amount on the basis of an average value of said photometric selected and tricolor data corresponding to a specific color on said coordinate.

Claim 9

A method for determining exposure amount in an image copying apparatus, comprising the steps of: determining tricolor photometric data by dividing a color film with images recorded thereon into a plurality of segments and by photometrically measuring said segments; determining tricolor corrected photometric data by correcting said tricolor photometric data with photometric data on a low-density portion of the same color film including an image-recorded portion thereof; determining tricolor normalized data by normalizing said tricolor corrected photometric data by transforming said tricolor corrected photometric data in accordance with a predetermined condition of transformation; classifying said tricolor normalized data by determining to which of a plurality of divided regions on a predetermined coordinate said tricolor normalized data belongs; selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data and an operational mode of said image copying apparatus, wherein a weighted average value of the average value of said tricolor photometric data selected and of the tricolor data corresponding to said specific color on said coordinate is calculated by changing the weight in correspondence with the operational mode of said image coping apparatus, and the exposure amount is calculated on the basis of said weighted average value; and determining the exposure amount on the basis of an average value of said photometric selected and tricolor data corresponding to a specific color on said coordinate.

Claim 14

A method for determining exposure amount in an image copying apparatus, comprising the steps of: determining tricolor photometric data by dividing a color film with images recorded thereon into a plurality of segments and by photometrically measuring said segments; determining tricolor corrected photometric data by correcting said tricolor photometric data with photometric data on a low-density portion of the color film including an image-recorded portion thereof; determining tricolor normalized data by normalizing said tricolor corrected photometric data by transforming said tricolor corrected photometric data in accordance with a condition of transformation set by storage data; classifying said tricolor normalized data by determining to which of a plurality of divided regions on a predetermined coordinate said tricolor normalized data belongs; selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data; and determining the exposure amount on the basis of an average value of said tricolor photometric data selected and storing necessary tricolor photometric data as said stored data; wherein said necessary tricolor photometric data is equal to said tricolor photometric data which is selected by using the following steps: selecting said tricolor corrected photometric data in accordance with a predetermined condition of selection; determining tricolor normalized data selected, by normalizing said tricolor corrected photometric data selected, by transforming said tricolor corrected photometric data selected, in accordance with a condition of transformation set by same stored data; classifying said tricolor normalized data selected, by determining to which of a plurality of divided regions on a predetermined coordinate said tricolor normalized data selected belongs; and selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data selected.

Claim 15

A method for determining exposure amount in an image copying apparatus, comprising the steps of: determining tricolor photometric data by dividing a color film with images recorded thereon into a plurality of segments and by photometrically measuring said segments; determining tricolor corrected photometric data by correcting said tricolor photometric data with photometric data on a low-density portion of the color film including an image-recorded portion thereof; determining tricolor normalized data by normalizing said tricolor corrected photometric data by transforming said tricolor corrected photometric data in accordance with a condition of transformation set by storage data; classifying said tricolor normalized data by determining to which of a plurality of divided regions on a predetermined coordinate said tricolor normalized data belongs; selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data; and determining the exposure amount on the basis of an average value of said tricolor photometric data selected and storing necessary tricolor photometric data as said stored data; wherein said necessary tricolor photometric data is equal to said tricolor photometric data which is selected by using the following steps: selecting said tricolor corrected photometric data in accordance with a predetermined condition of selection; determining tricolor normalized data selected, by normalizing said tricolor corrected photometric data selected, by transforming said tricolor corrected photometric data selected, in accordance with a condition of transformation set by same stored data; classifying said tricolor normalized data selected, by determining to which of a plurality of divided regions on a predetermined coordinate said tricolor normalized data selected belongs; and selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data selected.

Claim 16

A method for determining exposure amount in an image copying apparatus, comprising the steps of: determining tricolor photometric data by dividing a color film with images recorded thereon into a plurality of segments and by photometrically measuring said segments; determining tricolor corrected photometric data by correcting said tricolor photometric data with photometric data on a low-density portion of the color film including an image-recorded portion thereof; determining tricolor normalized data by normalizing said tricolor corrected photometric data by transforming said tricolor corrected photometric data in accordance with a condition of transformation set by storage data; classifying said tricolor normalized data by determining to which of a plurality of divided regions on a predetermined coordinate said tricolor normalized data belongs; selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data; and determining the exposure amount on the basis of an average value of said tricolor photometric data selected and storing necessary tricolor photometric data as said stored data; wherein said necessary tricolor photometric data is said tricolor photometric data selected in correspondence with the classification of said tricolor normalized data.

Claim 17

A method for determining exposure amount in an image copying apparatus, comprising the steps of: determining tricolor photometric data by dividing a color film with images recorded thereon into a plurality of segments and by photometrically measuring said segments; determining tricolor corrected photometric data by correcting said tricolor photometric data with photometric data on a low-density portion of the color film including an image-recorded portion thereof; determining tricolor normalized data by normalizing said tricolor corrected photometric data by transforming said tricolor corrected photometric data in accordance with a condition of transformation set by storage data; classifying said tricolor normalized data by determining to which of a plurality of divided regions on a predetermined coordinate said tricolor normalized data belongs; selecting said tricolor photometric data in correspondence with the classification of said tricolor normalized data; and determining the exposure amount on the basis of an average value of said tricolor photometric data selected and storing necessary tricolor photometric data as said stored data; wherein said necessary tricolor photometric data is said tricolor photometric data selected in correspondence with the classification of said tricolor normalized data.