1、CMPTE RECOMMENDED PRACTICE RP 21 6-2002 Specifications for 3-Perforation Test and Alignment Film for 35-mm Motion Pictures 1 Scope This practice specifies the format, dimensions, and optical densities of a test and alignment chart for 3-perforation 35-mm motion-picture film. The image is designed fo
2、r use as an operational alignment tool for telecine. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this practice. At the time of publication, the editions indicated were valid. All standards are subject to revision,
3、and parties to agreements based on this practice are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. SMPTE 59-1 998, Motion-Picture Film (35-mm) - Camera Aperture Images and Usage SMPTE 96M-1999, Television - 35- and 16-mm Motion-Pictur
4、e Film - Scanned Image Area IS0 5-2:1991, Photography - Density Measure- ments - Pari 2: Geometric Conditions for Transmis- sion Density 3 Purpose This practice specifies a film image pattern designed to provide a television picture for aligning, adjusting, and checking basic setup parameters for tr
5、ansfer of 35-mm 3-perforation motion-picture film on a telecine or film scanner. 4 Description A reproduction of the test pattern is shown in figure 1. Pagel of 6 pages Figure 2 shows various attributes of the test chart. These are described below. All dimensions of the test chart are given as a per
6、centage of picture height (see figure 3). 4.1 Film stock The pattern shall be produced on 35-mm camera original black-and-white film stock, utilizing short-pitch B&H perforations. The images shown in this practice are positive images. 4.2 Film optical properties 4.2.1 Density All densities shall be
7、measured in accordance with IS0 5-2. 4.2.2 Black density All black items and alphanumeric labels shall have a minimum density of at least 1.9 nominal. 4.2.3 White density All white items shall have a density no greater than 0.2 (nominally clear). 4.3 Pattern and background The dimensions of the test
8、 chart are given as a percentage of picture height and shall be reproduced with a tolerance of tr 0.1% of the frame height. The specific dimensions are given on the chart in figure 3. The background density of the image shall be fixed to 0.8 nominal. Copflght O 2002 by THE SOCIETY OF MOTION PICTURE
9、AND TELEVISION ENGINEERS 595 W. Hartsdaie Ave., White Plains, NY 10607 (914) 761-1 100 Approved August 14,2002 RP 216-2002 Figure 1 - Test chart NOTES 1 Outside dimensions of barber pole represent the camera scanned image as defined in SMPTE 59M. 2 Inside dimensions of barber pole represent the scan
10、ned image area as defined in SMPTE 96M. Figure 2 - Test chart attributes Page 2 of 6 pages RP 216-2002 c i! 1 e- d- M r) 7 E , i: . ”. r . . . i. . . , . O - s: $ $ . .:.:. . .:.: . . .A , i: x:, * :. . m c 8 $ .- o (3 c I (3 P O o m c al al 2 iz n Cu 8 f O I w I- z Page 3 of 6 pages RP 216-2002 The
11、 width of the top and bottom 400-line bursts shall 4.4 Spatial frequency bursts Patch 1 2 3 4 5 Density 1.9 1.5 0.9 0.3 Clear 4.4.1 Description Vertical and horizontal spatial frequency bursts are calibrated in lines per picture height. They are located in the central lower area of the chart as show
12、n in figure 2. The calibrated bursts are in 100-line increments from 1 00-line resolution to 800-line resolution, alternating from left to right in a manner that gives the highest resolution in the center of the chart. The vertical frequency patterns are located directly over the horizontal frequenc
13、y patterns so that both vertical and horizontal resolution can be evaluated simultaneously with a 15-line horizontal sweep selected on a standard waveform monitor. Additional vertical and horizontal 400-line spatial frequency bursts are located at the top center, bottom center, left center, and righ
14、t center of the test chart (see figure 2). 4.4.2 Format Each central spatial frequency burst width and height is nominally equal to 10% of picture height. Each left and right spatial frequency burst width and height is nominally equal to 10% of picture height. 4.5 Frequency wedges 4.5.1 Description
15、Horizontal and vertical frequency wedges are located at the top, center, and bottom left and right edges of the chart. Physical dimensions and location of the wedges shall be as specified in figure 3. 4.5.2 Format The wedges are calibrated in lines per picture height. The lines of resolution shall b
16、e printed on the wedge as shown in figure 3. The height of the numbers shall be at least 1% of picture height. NOTE -The wedge resolution is accurate only if the chart is sized correctiy. Zooming in or out or changing the aspect ratio of the chart will change the spatial relationships and thus the s
17、pecific resolution of the wedge. 4.6 Density gradient 4.6.1 Description Five density patches are located in the upper center of the chart as specified in figure 2. 4.6.2 Format The density of each patch shall be as indicated in table 1. The densities shown in table 1 are nominal and are not intended
18、 for quantitative analysis. Table 1 - Patch density NOTE - The burs resolution is accurate oniy if the chart is sized correctiy. Zooming in or out or changing the aspect ratio of the chart will change the spatial relationships and, thus, the specific resolution of the wedge. 4.76 Format The thicknes
19、s Of both Sets Of nes is equal to 0.167% k 0.011% of picture height. Page 4 of 6 pages RP 216-2002 The boundary borders shall be marked with text as shown in figure 3. The text height shall be at least 2% of picture height. The boundary arrow dimensions are given in figure 4. 4.8 Center circle 4.8.1
20、 Description A scribed circle in the center of the frame facilitates veriiication of optical geometry. The circle does not intersect any other pattern on the chart. 4.8.2 Format Thediameterof the centercircleshall be thefull image height.Thewidthof the lineshall be0.167%t 0.011% of picture height. 4
21、.9 Electrical alignment An alignment pattern is located at the center of the test pattern to facilitate optical centering and possibly beam or scanner alignment. (see figure 5). 4.10 Mid-term response 4.1 0.1 Description A black-and-white patch is located in the upper center of the frame. These patc
22、hes are used to verify various scanning characteristics such as afterglow and mid- or long-term smear. 4.10.2 Format The patch shall have dimensions as shown in figure 3. A detail of the patch is given in figure 6. 4.11 Center box 4.1 1.1 Description A square box is located in the geometric center o
23、f the test image. 4.1 1.2 Format The center box shall have the dimensions shown in figure 5. The center of the box shall be identiied with a dot. 4.12 Label The name of the practice shall be placed in the upper center of the frame, as shown in figure 3. The letters shall be in bold and shall be nomi
24、nally 4% of picture height. NOTES 1 Silver image films scatter light such that the effective density in the specular optical system of the television film chain is increased by an average factor of 1.35 over that measured in diffuse light. For dye images, this light-scatter factor (Callier Q) is app
25、roximately 1.0. Inasmuch as it is common practice to reproduce this test pattern on photo- graphic silver film, it should not be used for accurate adjust- ment of color telecine gain and black level. 2 Test material conforming to this practice may be avail- able from the Society of Motion Picture an
26、d Television Engineers. Page 5 of 6 pages RP 216-2002 Boundary wdge &tai NOTE -All dimensions are as a percentage of picture height. Figure 4 - Wedge and boundary arrow detail _f line thickness = 0.167% 10 of picture height Figure 5 - Center box detail Figure 6 - Mid-term response detail Page 6 of 6 pages
