Damage Interference
Interference is a unique effect inside Digieffects Damage because of its ability to give the impression that your video clip is interlaced and being displayed on a Cathode Ray Tube monitor. Most television signals used in broadcasting have traditionally been interlaced. This system of scanning two ‘fields’ of horizontal lines (each field made up of every other line in the image, usually referred to as “Upper/Lower”, “Odd/Even”, or even “A/B”) to make each ‘frame’ of video is both a form of analog video compression, and the reason why interlaced video motion looks smoother than progressive video or film motion. It’s also the reason why a ‘freeze’ frame of high motion interlaced video shows ‘sawtoothed’ edges as motion occurring between the instant of scanning the first field and the second field creates two different half-pictures being blended into a single ‘frame.’
This effect will be particularly useful for effects you want to specifically portray inexpensive television receivers or stereotypical industrial video camera signals. Each field's attributes can be handled individually, simulating an image that's created electronically from scan lines.
DE_Interference Parameters
Reset
changes the properties in Artifact back to their default state.
Options
will be the link to click to register your copy of Digieffects Damage, if no valid registration information is found on your system. Otherwise, it will function just like “About”
About
will show you the version of the software you are running
Digieffects
In the twirl-down menu labeled “Digieffects” is the Digieffects preset bar.
Source Blend
Controls how much of the original, unaltered image is blended in the final image. A value of zero shows no original image, a high value of near 100...90 for example...will leave very little effect visible and a value of 100 will show only the original image and no effect, but the rendering will be zippy...
Random Seed
The Random Seed controls the way the “randomness” of the effect is implemented over time. While the property range runs from 0-32000, the value doesn't represent the 'amount' of randomness so much as simply different randomness. Note that this value can be used in multiple cases with the same value and the results will be predictable and similar in cases where consistent use of the effect is required in several instances. If the results you are getting starts looking too predictable, simply change the Random Seed.
Note: In Interference, the vast majority of the parameters are independently for each field of video that the effect creates. The parameters each have twin settings, one for (E) which applies to the 'even field' and the (O) setting for the 'odd field.' The most effective looks for the Interference effect will utilize these settings to create differences between each field.
Fields Setup
Size
Set the vertical size for each 'field' here. A very effective way to utilize this parameter is to set one field for a height of one and set its Luminance setting relatively dark creating the 'border' between the 'scanlines', while using the other 'field' for your picture content with a size setting of 2-4.
Process Input
While the Source Blend value controls the overall ratio between the unaffected source image vs. the effect-processed image, the Process Input controls how much of the source image gets processed in each of the two pipelines (one for E and one for O).
Luminance
This value influences the luminance level of each 'field' independently. Setting the two fields for different values will accentuate the 'scanline' look of your results.
Tint
Check the box to Tint your video to help create effects like simulated night vision.
Tint Color
Pick the color of your Tint using the eyedropper or pick from the palette from clicking on the color swatch.
Noise Level
Add noise to the effect by increasing this value.
Chroma Noise
Check the Chroma Noise to make your noise multicolored.
Decay Amount
Decay Amount controls the number of re-processing or feedback-loop of the effect. Higher value here means the processed image gets its color values 'dirtied' even further, where much of the information in the mid- to hi- range getting lost. Imagine running a photocopy of a photocopy again and again...or possibly a VHS dub of a dub. The effect is highly-dependent on source footage, but usually causes some blooming of mid- and highlights.
Smear
When Distorted image is present (see the Modulation section), it is fed back into the re-processing loop. The effect gets especially interesting when there are subtle, varying amounts of distortion at medium to high Decay Amount values.
Modulation
Distortion Method
There are several modes of distorting of image available.
Shift translates the entire 'field' (as defined by your E and O settings) to the right, that can be used to simulate transmission delay, for example.
Linear applies linearly-varying amounts of shift from the top of the screen to the bottom of the screen. Basically, you will see a diagonally stretched image.
Sawtooth mode applies a sawtooth-wave to vary the amount of left-right shifting of 'scanlines'.
Noisy mode is very random, such that each scanline is translated left-right by highly random values.
Wave mode is similar to Sawtooth, except that the waveform is more rounded.
Horiz. Adj.
Controls the extent of left-right modulation, as defined by the mode above. High values here combined with high Influence result in the greatest distortion. Note: when a scanline is distorted and shifted 'outside' the screen area, the result is that scanline becomes black because there is nothing left.
Influence
Influence affects the Horizonal shifting as defined above, but depends on the Distortion Mode. At zero, there will be no shifting at all. Low Influence values mean the modulation effect will be subtle, even if the Horizontal Adjustment values are high. In some of these modes, you can think of Influence as the 'Coarse' value control with Horizontal Adjustment being the 'Fine' control.
In Shift Distortion mode, Influence amplifies the Horizontal Adjustment value, so a low value here counteracts Horizontal Adjustment value, while a high value exaggerates it.
Similarly in Linear Distortion mode, Influence adjusts the 'slope' of the diagonal stretching by interacting with the Horizontal Adjustment value.
Also, in Noisy Distortion mode, Influence tends to exaggerate the horizontal shifting by complementing the Horizontal Adjustment value.
In Wave and Sawtooth Distortion modes, Influence controls the up-and-down-ness of the waves.
Comb Filter Level
In signal processing, a comb filter is typically employed to combine a visual signal with a delayed version of itself to maximize perceived image quality through the construction of the two versions of the image while the destructive interference caused by the combining of the two tend to “smooth” out some details that aren't always deemed visually desirable. The effect of the comb filters in Interference are controlled by this value. To maximize the horizontal scanline look, try to run one field's comb filter at max value (20) and the other field at minimum (0).
