FILM-TO-VIDEO Transfers, Image Structure, Curves

FILM-TO-VIDEO TRANSFERS

When you transfer the film directly to video, you can set up the telecine using the negative Telecine Analysis Film (TAF) supplied by Eastman Kodak Company. The TAF consists of a neutral density scale and an eight-bar color test pattern with a LAD gray surround.

The TAF gray scale provides the telecine operator (colorist) with an effective way to adjust subcarrier balance and to center the telecine controls before timing and transferring a film. The TAF color bars provide the utility of electronic color bars, even though they do not precisely match the electronically generated color bars. Using the TAF will help obtain optimum quality and consistency in the film-to-video transfer. For more information regarding TAF, see KODAK Publication No. H-9, TAF User's Guide.

IMAGE STRUCTURE

The modulation-transfer curves, and the diffuse rms granularity data were generated from samples of 5205 Film exposed with daylight illumination and processed as recommended in Process ECN-2 chemicals. For more information on image-structure characteristics, see KODAK Publication No.H-1, KODAK Motion Picture Film.

MTF:

Refer to curve.

The "perceived" sharpness of any film depends on various components of the motion picture production system. The camera and projector lenses and film printers, among other factors, all play a role. But the specific sharpness of a film can be measured and charted in the Modulation Transfer Curve.

rms Granularity:

Refer to curve.

Read with a microdensitometer, (red, green, blue) using a

48-micrometer aperture.

The "perception" of the graininess of any film is highly dependent on scene content, complexity, color, and density. Other factors, such as film age, processing, exposure conditions, and telecine transfer may also have significant effects.

CURVES

Sensitometric Curves

LOG EXPOSURE (lux-seconds)

3.0	-4	-3.2		-2		-1	-0.2
3.0
	Exposure: 5500 K Daylight 1/50 sec
	Process: ECN-2
	Densitometry: Status M
2.0
DENSITY
1.0		B
		B
		G
		R
0.0-10	-8	-6	-4	-2	0	2	4	6
H15205TAF				Camera Stops

The curves describe this film's response to red, green, and blue light. Sensitometric curves determine the change in density on the film for a given change in log exposure.3

Modulation-Transfer Function Curves

1000
		Exposure: Daylight 5500 K
		Process: ECN-2
		Densitometry: Status M
	100
(%)			B
RESPONSE			B
RESPONSE			G
			G
	10		R
	10
	1	10	100	1000
	1	10	100	1000

H15205TB

SPATIAL FREQUENCY (cycles/mm)

This graph shows a measure of the visual sharpness of this film. The x-axis, "Spatial Frequency," refers to the number of sine waves per millimeter that can be resolved. The y-axis, "Response," corresponds to film sharpness. The longer and flatter the line, the more sine waves per millimeter that can be resolved with a high degree of sharpness—and, the sharper the film.

KODAK VISION2 250D Color Negative Film 5205 / 7205 • H-1-5205t