Raw Data is sensor data before any image processing, which is called Bayer pattern/image. The benefit of Raw data, in Reality, is that uncompressed data captured from a camera is then de-Bayered in Reality using the algorithm to provide high-quality video with superior signal for achieving good quality keyer.
In a single-sensor camera, color is produced by filtering each photosite (or pixel) to produce either red, green or blue values most often used is the Bayer pattern. Because each pixel contains only one color value, raw isn’t viewable on a monitor in any discernible way. This means that raw isn’t video.
Raw has to be converted to video for viewing and use. This is usually done through a de-Bayer process, which determines both color and brightness for each finished pixel in the image. The upside to raw video is that no typical video processing has been baked in. The sensor outputs exactly what it sees - no white balance, ISO or other color adjustments are there. This, along with a high bit rate, allows for a huge amount of adjustment possible in Reality.
Before we begin, let's first understand that not all the cameras provide Raw data. There are specific cameras in the market which will deliver Raw, one of them is Panasonic VariCam. The Reality now provides support for VariCam's Raw data to use in the live video production making the keying look more better than ever.
To setup Raw input in Reality, follow the steps below:
Launch the project that you intend to work using Raw input.
In the Setup tab, on the node graph add the Nodes (Raw data processing nodes) mentioned below in the same order (1-2 and 3).
Delognode. Go to Experimental > Varicam
DebayerSourcenode. Go to Experimental
Matrix-Drangescalenode. Go to Experimental > Varicam
These 3 nodes will do all the image processing and de-Bayer/de-mosaic the raw input data.
For video input, add
AJACardnode then add
Deviceoutput pin to
Now add 3 new nodes (in the order as shown above) which will do all the image processing and de-Bayer/de-mosaic the raw input data.
Inputpin and finally
Mixernode or any other node in the compositing pipeline depending on what you would like to compose.
The below image shows Raw data processing nodes from input to output. In other words, simply assume that Video coming
Outputpin is from AJA's input. And the output from
Outputpin goes to other the input pin of other nodes.
The below image shows Raw data processing nodes from input to output with the use of other nodes, in this example, it is composited with Cyclorama for keyer.