The background image to replace the blue/green screen in the foreground. Keylight’s core algorithm was developed by the Computer Film Company (now Framestore) and has been further developed by Foundry.Ĭopyright © 2022 Foundry & Framestore.

Use the Screen Matte parameters to improve the matte. To remove blue/green spill from the foreground object, use the Despill Bias control to pick skin tones from the source. Use the Screen Color selector to choose a color from the Source input to use as the blue/green screen color and the View dropdown menu to judge the key. Schedule differences, response topography, order of conditions and the length of each phase were not sufficient to account for these results.Keylight is an industry-proven color difference keyer. Even though resurgence was not obtained with every pigeon, at least some small-magnitude resurgence occurred in each experiment and was not related systematically to reinforcement rates of alternative responding. In Experiments 5 and 6, differential reinforcement rates were arranged by using fixed-DROs and VIs for pecking a different key, respectively.

In Experiment 4, reinforcement rates first were differential and, then, equal to those in the Training phase. In Experiment 3, reinforcers were discontinued before differential reinforcement rates were effected. Response-Elimination phase reinforcement rates were manipulated systematically in subsequent experiments: In Experiment 2, reinforcement rate was equal, in one component, and lower or higher in the other, than in the Training phase. Experiment 1B was a replication of Experiment 1A, but with experimentally-naïve pigeons. More resurgence occurred in the lean component, but this could have resulted from response-rate differences between components in the Training-phase. Reinforcement rates were equal and then, higher in one (rich) component, and lower in the other (lean), than in the Training phase. In the Response-Elimination phase, a variable differential-reinforcement-of-other-behavior (DRO) schedule was in effect in each component. In Experiment 1A, key pecking was maintained on a multiple variable-interval (VI) VI schedule in the Training phase. The effects of reinforcement rate of alternative responding on resurgence were studied in six experiments with pigeons.

Keylight 1.2 alternative