Film-Tech Forum ARCHIVE: Need resolution numbers for publicty copy

my profile | my password | search | faq & rules | forum home

»	Film-Tech Forum ARCHIVE » Operations » Film Handlers' Forum » Need resolution numbers for publicty copy (Page 2)

This topic comprises 2 pages: 1 2

Author

Topic: Need resolution numbers for publicty copy

Bryan M. Montgomery
Film Handler

Posts: 47
From: Chillicothe, Ohio
Registered: Jul 2007

posted 09-25-2007 12:28 AM

Why is it that only technicians seem to love digital?
Oh yeah, beacause they will still have a job after its implemented.

| IP: Logged

Jeffry L. Johnson
Jedi Master Film Handler

Posts: 809
From: Cleveland, Ohio, USA
Registered: Apr 2000

posted 10-14-2007 12:50 PM

quote:
Information Content of Various Display Formats

Format: NTSC
Pixels (Horizontal): 437
Pixels (Vertical): 483
Total Pixels (HxV): 0.2 M
Viewable Pixels (Horizontal): 350
Viewable Pixels (Vertical): 338
Total Viewable Pixels (HxV): 0.1 M
Field/Frame rate/sec: 30
Bandwidth (Mbytes/sec): 11
Percentage of IMAX HD: 0.3%

Format: HDTV
Pixels (Horizontal): 1030
Pixels (Vertical): 1035
Total Pixels (HxV): 1.1 M
Viewable Pixels (Horizontal): 1030
Viewable Pixels (Vertical): 686
Total Viewable Pixels (HxV): 0.7 M
Field/Frame rate/sec: 30
Bandwidth (Mbytes/sec): 64
Percentage of IMAX HD: 2.0%

Format: 35 mm / 4 perf
Film Dimensions, Horizontal (mm): 20.1
Film Dimensions, Vertical (mm): 15.2
Film Dimensions, Area (mm^2): 306
Pixels (Horizontal): 3216
Pixels (Vertical): 2432
Total Pixels (HxV): 7.8 M
Viewable Pixels (Horizontal): 1608
Viewable Pixels (Vertical): 1216
Total Viewable Pixels (HxV): 2.0 M
Field/Frame rate/sec: 24
Bandwidth (Mbytes/sec): 141
Percentage of IMAX HD: 4.5%

Format: 70 mm / 5 perf [Showscan]
Film Dimensions, Horizontal (mm): 48.6
Film Dimensions, Vertical (mm): 22.1
Film Dimensions, Area (mm^2): 1074
Pixels (Horizontal): 7776
Pixels (Vertical): 3536
Total Pixels (HxV): 27.5 M
Viewable Pixels (Horizontal): 3888
Viewable Pixels (Vertical): 1768
Total Viewable Pixels (HxV): 6.9 M
Field/Frame rate/sec: 60
Bandwidth (Mbytes/sec): 1237
Percentage of IMAX HD: 39.8%

Format: 70 mm / 8 perf
Film Dimensions, Horizontal (mm): 48.6
Film Dimensions, Vertical (mm): 36.3
Film Dimensions, Area (mm^2): 1764
Pixels (Horizontal): 7776
Pixels (Vertical): 5808
Total Pixels (HxV): 45.2 M
Viewable Pixels (Horizontal): 3888
Viewable Pixels (Vertical): 2904
Total Viewable Pixels (HxV): 11.3 M
Field/Frame rate/sec: 24
Bandwidth (Mbytes/sec): 813
Percentage of IMAX HD: 26.1%

Format: 70 mm / 8 perf
Film Dimensions, Horizontal (mm): 48.6
Film Dimensions, Vertical (mm): 36.3
Film Dimensions, Area (mm^2): 1764
Pixels (Horizontal): 7776
Pixels (Vertical): 5808
Total Pixels (HxV): 45.2 M
Viewable Pixels (Horizontal): 3888
Viewable Pixels (Vertical): 2904
Total Viewable Pixels (HxV): 11.3 M
Field/Frame rate/sec: 30
Bandwidth (Mbytes/sec): 1016
Percentage of IMAX HD: 32.7%

Format: 70 mm / 15 perf IMAX(R)
Film Dimensions, Horizontal (mm): 69.6
Film Dimensions, Vertical (mm): 48.5
Film Dimensions, Area (mm^2): 3376
Pixels (Horizontal): 11136
Pixels (Vertical): 7760
Total Pixels (HxV): 86.4 M
Viewable Pixels (Horizontal): 5568
Viewable Pixels (Vertical): 3880
Total Viewable Pixels (HxV): 21.6 M
Field/Frame rate/sec: 24
Bandwidth (Mbytes/sec): 1555
Percentage of IMAX HD: 50%

Format: 70 mm / 15 perf IMAX(R) HD
Film Dimensions, Horizontal (mm): 69.6
Film Dimensions, Vertical (mm): 48.5
Film Dimensions, Area (mm^2): 3376
Pixels (Horizontal): 11136
Pixels (Vertical): 7760
Total Pixels (HxV): 86.4 M
Viewable Pixels (Horizontal): 5568
Viewable Pixels (Vertical): 3880
Total Viewable Pixels (HxV): 21.6 M
Field/Frame rate/sec: 48
Bandwidth (Mbytes/sec): 3111
Percentage of IMAX HD: 100%

Notes:
a) assuming 80 lp/mm resolvable information on film negative; video data from: Carlson, SMPTE Journal Dec. 1984
b) assuming 40 lp/mm resolvable information on screen; video data from: Carlson, SMPTE Journal Dec. 1984, HDTV is NHK std.
c) bandwidth = (total viewable pixels x frame rate x 24 colour bits/pixel) / 8 bits/byte

Taken from Appendix 1 of SMPTE Preprint No. 135-22: IMAX HD -- A High Definition Motion Picture System (1993).

| IP: Logged

Bernie Anderson Jr
Master Film Handler

Posts: 435
From: Woodbridge, New Jersey
Registered: Apr 2000

posted 10-15-2007 11:05 AM

How can you count pixels on film? Its a photograph not an array of pixels.

| IP: Logged

Jeffry L. Johnson
Jedi Master Film Handler

Posts: 809
From: Cleveland, Ohio, USA
Registered: Apr 2000

posted 10-15-2007 11:43 AM

quote: Bernie Anderson Jr
How can you count pixels on film?

Read the notes.

Negative pixels assume 80 resolvable line pairs per millimeter. Positive pixels assume 40 resolvable line pairs per millimeter.

Granted the HDTV specification is outdated, and the 35 mm dimensions are undersized for the 1.37:1 frame, but it's a start.

| IP: Logged

Paul H. Rayton
Expert Film Handler

Posts: 210
From: Los Angeles, CA , USA
Registered: Aug 2003

posted 10-19-2007 03:28 PM

Here's a graphic depiction of resolution, prepared a few years ago by Schneider Co. Some of the numbers may not be exactly up to date, but it gives a good illustration of how things can vary.

[Edit to add re-sized illustration]

[ 10-19-2007, 04:47 PM: Message edited by: Paul H. Rayton ]

| IP: Logged

All times are Central (GMT -6:00)

This topic comprises 2 pages: 1 2

Printer-friendly view of this topic

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.