Part II – The Rendering Engine
What is a Rendering Engine ?
The rendering engine refers to the software that takes all the information...the image and the instructions and generates the final image.
What three things determine the final colour of an image pixel ?
Mathematical formulas of the rendering engine, original image file (jpeg, tiff, dng, pdf, psd, png) , user settings.
What are the three main components of a RAW file ?
Metadata, the Mosaic (raw data), jpeg preview (internal rendering engine of camera generates this),
Can PIE software be used only on Raw files ? No
What is a Live Rendering ?
A live rendering is a view of the image that only exists when the source image is loaded into the software. The software grabs the source information and generates a preview of the image. A fixed rendering is when we take the preview and save it as a file, or print the image.
Where can the Rendering Metadata be stored ?
Saved inside the image file, in the database or catalogue, or the sidecar file xmp (extencible metadata platform).
When saving the metadata inside the image file, it can only be done in certain file types as it may corrupt the file. You cannot safe metadata inside a raw file.
A sidecar file allows you to attach metadata to a file on the side. A problem with sidecars is that they may get separated from your image file and you could loose the editing that you have added to an image.
Using Lightroom with a catalogue is the best way to go.
Give two examples of a Fixed Rendering
a. Saving a file as a jpeg, tiff,etc. This locks in the information. b. Printing the image.
Is a Preview a Live or a Fixed Rendering of the image ?
Live rendering.
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