1、SMPTE RECOMMENDED PRACTICE Spec+cations for Deetion Linearity TRC. Pattern for Televhion RP 38.1-1989 I. Scope Format. dimensions. and optical densities are specified for a test pattern trarisparencv to be used in tlie measurement of geometric distortion of television systems. 2. Piirposc The specif
2、ied test pattern is to be used with a suitable electronically-generated grating signal to tacilitate the adjustment of defiectioii linearity and the measurement of geometric distortion of television cameras and picture display devices. A suitable electronically-generated grating signal is specified
3、in IEEE Std 203-1934 (R1978), Tele- vision: hiethods of Measurement o Aspect Ratio und Geometric Distortion. 3. Forlnnt 8.1 Pattern. -4 reproduction of the test pttern is shown in Fig. 1. 8.2 Black Rings. Black rings, Iiaviiig ;III inner radius of one percent of picture height and an outer Page 1 of
4、 4 pages radius of two percent of picture height. are uni- formly spaced and arranged to overlay an elec- tronically-generated grating pattern. A black ball having a radius of 0.5 percent of picture height is located in the center of each black ring. 3.3 Number of Rings. There are 148 rings arranged
5、 in a grid of li vertical columns and 14 horizontal rows. Sunibers appear from left to right indicnt- ing columns 2 through 16 and letters from top to bottom. B tlirougli hi. indicating rows 2 through 1 Y. 3.4 Centering. .A black cross is located in the center of the test pattern. 3.3 Arrow and Bord
6、er. The eight iiountlary arrows and Iilack border define the edge of the test pat- tern area iiid tlie scanned area. 3.6 Pattern Identification. Tlie identification nuni- lier of this dociiiiient appears on the test pattern. 4. Dimensions 4.1 Test Pattern. The dimensions of the test pattern shall be
7、 as shown in Figs. 2 through 5, in per- centages of frame height (AA). E 87 F I 87 J o o o Q m6.0 o O ena-o o o e i L CMPTE RP3S.I L . 0 0) o O o O wo o o 0 wM8 o o o Q B QV Q 0 ove Fig. I Reproduction of Test Pattern Copyright I I989 by the SOCIETY OF ilfOTlOh PICTURE .ISD TELEIISIOS E,GlhEERS 595
8、West Hartsdale Avenue. White Plains. XY 10607. (914) 761-1100 Revision of RP 38.14983 Approved February 21,1389 SMPTE RP838.L 87 M 8357401 0000480 4b7 I I Ap I AA AN I AL ao4 AK c A!- Fig. 3 Location of Horizontal Rows of Circles (Fig. 3) + AC c SMPTE - RP*38.1 87 m 8357401 0000481 3T5 W Poge 3 of 4
9、 pflges RP 38-1-1983 I e c- BP + BL C - BK m + BO BN I I r-9G4 BC Fig. 4 Location of Vertical Rows of Circles (Fig. 5) .4.1.1 Circular Tiirgets (Figs. Y :incl 4). The tolerance on the dimensions for the location of these tar- gets is to be c 0.03 percent of picture height (AA). The tolerance on the
10、radii of the circles is c 0.1 percent of picture height. 4.1.2 Central Cross (Fig. 2). The tolerance on tlie dimensions locating the central cross is 2 0.02 percent o picture height. The tolerance on the dimensions of the cross is c 0.1 percent of pic- ture height. 4.1.3 Boundary Arrows (Fig. 2). Th
11、e tolerance on the dimensions for the location of the boundary arrows is c i percent of picture height (AX). The tolerances of the dimensioning of the arrows are 2 1 percent and c 1 degree. 1 t CENTERCROSS 4.1.4 Row and Column Identification. The identifica- tion numbering and lettering for the rows
12、 and columns. respectively, is to be in bold type of approximately tlie size shown. 4.1.5 Pattern Identification. The SMPTE identifica- tion number shall be centrally located in the lower portion of the pattern approximately as shown. Bold type shall be used. 4.2 Image Size. The size of the scanned
13、area as indi- cated by the boundary arrows shall be as follows: Y CO 2 RADIUS CIRCLES ARROWS Fig. 5 Details of Figures on Pattern 4.2.1 2x2 in test slides shall have dimensions as speci- fied in American National Standard for Tele- vision - Image Areas and Mounts for Slides and Opaques. ASSI/SMPTE 9
14、4-1985. SMPTE Page 4 of 4 pages Dimensions -1.1 A B AC .1 D .1 E .i F AG AH AI .-I K .i L hl1 AS AO A P B.l BB BC BD BE HF BG BH BI RI; BL BAI BK BO BP BR BS C.1 CB CC CD CE CF CG CH .iJ BJ BQ RP*3B 3 Percentage 100.0000 30.0000 2.8986 10.1449 17.39 13 24.6377 3 1.884 1 39.1304 46.3768 53.6232 6 O.
15、8 6 9 6 68.1 159 75.3623 82.6087 89.855 1 97.10 14 133.33333 21.88618 1.62602 9.75610 17.88618 26.01626 34.14634 42.27642 30.40650 58.53658 66.66666 74.79674 82.92682 9 1 .O5690 99.18698 107.3 1706 115.44714 123.57722 13 1.70730 0.3500 7.6000 4.0000 4.0000 0.0100 2.0000 1 .o000 O. 5 O O O O 89 W 835
16、7403 OOOOY82 ax 10 6.300 3.150 0.183 0.639 1 .O96 1.552 2,009 2.465 2.922 3.378 3.835 4.291 4.748 5.204 5.66 1 6.1 17 8.400 1.379 0.102 0.615 1.127 1.639 2.151 2.663 3.176 3.688 4.200 4.7 12 3.224 5.737 6.249 6.761 7.273 7.785 8.298 0.022 0.479 0.252 0.252 0.006 O. 126 0.063 0.032 4.2.2 35-mm test f
17、ilms shall have image dimensions in accordance with American National Standard for Motion-Picture Film (35-mm) - Television Image Area, ANSI/SMPTE 95-1984. 4.2.3 16-mm test films shall have image dimensions in accordance with American National Standard Dimensions for Television Image Area on i 6-mm
18、Motion-Picture Film, ANSI PH22.96- 1982. 4.3 Black Border. The dimensions of the black bor- der shall be as follows: 4.3.1 The dimensions (AA and BA) of the black border for 2x2 in slides are specified as the transmitted image in ANSI/SMPTE 94-1985. 4.3.2 For 35-mm motion-picture films, the black bo
19、r- der shall extend to the dimensions specified by Style A in American National Standard for Motion-Picture Film (35-mm) - Camera Aper- ture Images, ANSVSMPTE 59-1989. 4.3.8 For 16-mm motion-picture films, the black border shall extend to the dimensions specified in 2x2 0.8430 0.4213 0.0244 0.0856 0
20、.1466 0.2077 0.2688 0.3299 0.3910 0.4520 0.5131 0.5742 0.6333 0.6964 0.7573 0.8 186 1.1240 O. i 845 0.0137 0.0822 O. 1508 0.2193 0.2859 0.3564 0.4249 0.4935 0.5620 0.6303 0.699 1 0.7676 0.8361 0.9047 0.9732 1.0418 1.1103 0.0030 0.064 i 0.0337 0.0337 0.000 1 0.0169 0.0084 0.0042 Inches 35-mm 0.5940 0
21、.2970 0.0172 0.0603 O. i033 O. 1463 0. 1894 0.2324 0.2755 0.3185 0.3616 0.4046 0.4477 0.4907 0.5337 0.5768 0.7920 0.1300 0.0097 0.0580 0.1062 0.1545 0.2028 0.25 1 1 0.2994 0.3477 0.3960 0.4443 0.4926 0.5409 0.5892 0.6375 0.6858 0.7340 0.7823 0.002 1 0.0451 0.0238 0.0238 0.000 1 0.01 19 0.0059 0.0030
22、 231 m 16-mm 0.2760 O. 1380 0.0080 0.0280 0.0480 0.0680 0.0880 0.1080 0.1280 0.1480 0.1680 0.1880 0.2080 0.2280 0.2480 0.2680 0.3680 0.0604 0.0049 0.0269 0.0494 0.0718 0.0942 0.1 167 0.1391 0.1616 0.1840 0.2064 0.2289 0.2513 0.2738 0.2962 0.3186 0.341 1 0.3635 0.0010 0.0210 0.0110 0.0110 0.00003 0.0
23、053 0.0028 0.0014 RP 38.1-1989 American National Standard for Motion-Picture Film (16-mm) - Camera Aperture Image and Usage, ANSI/SMPTE 7-1988. 3. Optical Densities 5.1 Optical Densities. All optical densities shall be measured in accordance with American National Standard for Photography - Density
24、Measure- ments - Geometric Conditions for Transmission Density, ANSI PH2.19-1986. . 5.2 Background. The density of the background shall be 0.6 2 0.2. . 5.3 Pattern. The black border, arrows, rings, center- ing cross, and lettering shall have a.density greater than 1.9. NOTE 1: The emulsion position shall correspond to the one normally used for.the specific format. NOTE 2: Test, material conforming to this practice is available from the Society of Motion Picture and Tele- vision Engineers.
