Table 1 to Paragraph (d)-Requirements for Digitizing Permanent, Modern Textual Paper Records Table
Digital file specifications | Attributes |
Color mode | color or grayscale. |
Bit depth | 8 or 16. |
Color space | gray gamma 2.2, AdobeRGB1998, sRGB, ProPhoto RGB, ECIRGBv2. |
Resolution (Sampling Frequency) (Units are Pixels Per Inch/ppi minus Reproduction Scale Accuracy) | [GREATER THAN EQUAL TO]294 ppi (300 ppi-2%). |
Measurement parameters | Performance metric values Difference from aim (applies to 20 [LESS THAN EQUAL TO] L* [LESS THAN EQUAL TO] 100). |
Tone Response (OECF) L* (Units Colorimetric [DELTA]L*) gray patches that meet the measurement parameters | ± 5. |
White Balance (Units Colorimetric [DELTA]E(a*b*)) gray patches that meet the measurement parameters | [LESS THAN EQUAL TO]4%. |
Lightness Uniformity (Units Colorimetric-Standard Deviation Divided by Mean L*) | [LESS THAN EQUAL TO]3%. |
Average Color Accuracy (Units Colorimetric-Mean [DELTA]E 2000-for patches meeting the measurement parameters) | [LESS THAN EQUAL TO] 3.5. |
Color Accuracy 90th Percentile (Units Colorimetric-2.5 times average deviation for patches meeting the measurement parameters) | [LESS THAN EQUAL TO] 8.75. |
Color Channel Misregistration (Units Pixels) | [LESS THAN] 0.5 pixel. |
SFR 10 (Sampling Efficiency) (Measurement is a Ratio %) | [GREATER THAN]80%. |
MTF50 (50% SFR) (Percentage of Half Sampling Frequency) [Lower, Upper] | Percentage of half sampling frequency: [[GREATER THAN]40%, [LESS THAN]75%]. |
Reproduction Scale Accuracy (Units % Difference from Header PPI) | [LESS THAN]±2%. |
Sharpening (Units Max Modulation) | [LESS THAN] 1.1. |
Noise (Upper Limit) (Units Std Dev of L*) | [LESS THAN EQUAL TO] 2. |
Noise (Warning Limit) (Units Std Dev of L*) | [GREATER THAN EQUAL TO].25. |
Table 2 to Paragraph (e)-Requirements for Digitizing Permanent, Photographic Print Records and Paper Records That Have Fine Details
Digital file specifications | Attributes |
Color mode | color or grayscale. |
Bit depth | 8 or 16. |
Color space | Gray gamma 2.2, AdobeRGB1998, ProPhoto RGB, ECIRGBv2. |
Resolution (Sampling Frequency) (Units are Pixels Per Inch/ppi minus Reproduction Scale Accuracy) | [GREATER THAN EQUAL TO]392 ppi (400 ppi-2%). |
Measurement parameters | Performance metric values |
Tone Response (OECF) L* (Units Colorimetric [DELTA]L2000*) for any given gray patch | ± 4. |
White Balance (Units Colorimetric [DELTA]E(a*b*)) for any given gray patch | [LESS THAN EQUAL TO]4. |
Lightness Uniformity (Units Colorimetric - Standard Deviation Divided by Mean) | [LESS THAN]3%. |
Average Color Accuracy(Units Colorimetric-Mean [DELTA]E 2000-average deviation of all patches) | [LESS THAN]3.5. |
Color Accuracy 90th Percentile (Units Colorimetric-2.5 times average deviation of all patches) | [LESS THAN]8.75. |
Color Channel Misregistration (Units Pixels) | [LESS THAN]0.5 pixel. |
SFR10 (Sampling Efficiency) (Measurement is a Ratio %) | 80%. |
SFR50 (50% SFR) (Units Percentage of Half Sampling Frequency) [Lower, Upper] | Percentage of half sampling frequency: [[GREATER THAN]40%, [LESS THAN]75%]. |
Reproduction Scale Accuracy (Units % Difference from Header PPI) | [LESS THAN]± 2%. |
Sharpening (Units Max Modulation) | [LESS THAN]1.1. |
Noise (Upper Limit) (Units Std Dev of L*) | [LESS THAN]2. |
Noise (Lower Limit) (Units Std Dev of L*)-A warning should be raised if the image doesn't meet this criteria | [GREATER THAN EQUAL TO].25. |
36 C.F.R. §1236.50