Method for producing an electronic image from a photographic element

A method of producing an electronic image comprising:

• a) providing a photographic element that records exposure information, comprised of a support and three image-recording units coated upon said support, each image recording unit containing at least one silver halide emulsion layer, wherein said exposure information is recorded in the three image recording units and wherein the spectral sensitivities of said image recording units are chosen such that the average color error, .DELTA.E*.sub.ab, is less than or equal to 3.1, wherein said .DELTA.E*.sub.ab is computed for a specified set of 190 test colors of known spectral reflectance at 10 nm increments, and the light source is specified as D.sub.65, and wherein said .DELTA.E*.sub.ab is the average CIE 1976 (L*a*b*) .DELTA.E *.sub.ab between the CIE 1976 (L*a*b*)-space coordinates of said test colors and the CIE 1976 (L*a*b*)-space coordinates corresponding to transformed exposure signals, wherein said transformed exposure signals are formed by applying an exposure-space matrix to the exposure signals derived from said photographic element to transform said derived exposure signals to exposure signals corresponding to the color-matching functions of the CCIR Recommendation 709 primary set, and wherein said exposure-space matrix is derived so as to minimize ##EQU23## and noise-gain factor, .PSI., defined as the sum of the square roots of the sum of the squares of each row of the elements in the exposure space matrix is less than or equal to 6.5;
• b) photographically processing said photographic element to produce image-bearing density records;
• c) scanning said image-bearing photographic element on a pixel-wise basis with an opto-electronic scanner to produce image-bearing electronic signals;
• d) digitizing said image-bearing electronic signals;
• e) converting said image-bearing electronic signals into density-representative electronic signals using a 1-dimensional look-up table;
• f) subjecting said density-representative electronic signals to a matrix operation of at least three rows and three columns to produce a second set of density-representative electronic signals;
• g) converting said second set of density-representative electronic signals into exposure-representative signals using three 1-dimensional look-up tables;
• and
• h) converting said exposure-representative electronic signals into a second set of exposure-representative signals using a matrix operation of at least 3 rows and 3 columns.

A method of producing an electronic image comprising:

• a) providing a photographic element that records exposure information, comprised of a support and three image recording units coated upon said support, each image recording unit containing at least one silver halide emulsion layer, wherein said exposure information is recorded in the three image recording units and wherein the spectral sensitivities of said image recording units are chosen such that the average color error, .DELTA.E*.sub.ab, is less than or equal to 3.1, wherein said .DELTA.E*.sub.ab is computed for a specified set of 190 test colors of known spectral reflectance at 10 nm increments, and the light source is specified as D.sub.65, and wherein said .DELTA.E*.sub.ab is the average CIE 1976 (L*a*b*) .DELTA.E*.sub.ab between the CIE 1976 (L*a*b*)-space coordinates of said test colors and the CIE 1976 (L*a*b*)-space coordinates corresponding to transformed exposure signals, wherein said transformed exposure signals to formed by applying an exposure-space matrix to the exposure signals derived from said photographic element to transform said derived exposure signals to exposure signals corresponding to the color-matching functions of the CCIR Recommendation 709 primary set, and wherein said exposure-space matrix is derived so as to minimize ##EQU24## and noise-gain factor, .PSI., defined as the sum of the square roots of the sum of the squares of each row of the elements in the exposure space matrix is less than or equal to 6.5:
• b) photographically processing said photographic element to produce image-bearing density records;
• c) scanning said image-bearing photographic element on a pixel-wise basis with an opto-electronic scanner to produce image-bearing electronic signals;
• d) digitizing said image-bearing electronic signals;
• e) converting said image-bearing electronic signals into a set of exposure-representative electronic signals using a 3-dimensional look-up table.

A method of producing an electronic image comprising:

• a) providing a photographic element that records exposure information, comprised of a support and three image-recording units coated upon said support, each image recording unit containing at least one silver halide emulsion layer, wherein said exposure information is recorded in the three image recording units used in combination with a means of optical filtration external to said photographic element, wherein the spectral sensitivities of said image recording units are chosen such that the average color error, .DELTA.E*.sub.ab, is less than or equal to 3.1, wherein said .DELTA.E*.sub.ab is computed for a specified set of 190 test colors of known spectral reflectance at 10 nm increments, and the light source is specified as D.sub.65, and wherein said .DELTA.E*.sub.ab is the average CIE 1976 (L*a*b*) .DELTA.E*.sub.ab between the CIE 1976 (L*a*b*)-space coordinates of said test colors and the CIE 1976 (L*a*b*)-space coordinates corresponding to transformed exposure signals, wherein said transformed exposure signals are formed by applying an exposure-space matrix to the exposure signals derived from said photographic element to transform said derived exposure signals to exposure signals corresponding to the color-matching functions of the CCIR Recommendation 709 primary set, and wherein said exposure-space matrix is derived so as to minimize ##EQU25## and noise-gain factor, .PSI., defined as the sum of the square roots of the sum of the squares of each row of the elements in the exposure space matrix is less than or equal to 6.5;
• b) recording an image of an object illuminated by scene illumination and optical filtration in the photographic element;
• c) photographically processing said photographic element to produce image-bearing density records;
• d) scanning said image-bearing density records on a pixel-wise basis with an opto-electronic scanner to produce image-bearing electronic signals;
• e) digitizing said image-bearing electronic signals;
• and
• f) producing the electronic image from said electronic image-bearing signals.