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This belief does have an element of truth, so let's examine the makeup of natural oils. Crude-based (mineral) oil is made in an oil refinery from natural resources. Crude oil provides the components for all oil-based products, including mineral motor oils. At the refinery, the crude is broken down into different components (like gasoline and kerosene); motor oil is only one of the end products. Crude oil is extremely valuable because it's a non-renewable natural resource -- when we run out, it's gone for good. Motor oils made from paraffin-based crude have a reputation for causing deposits in the engine, because wax is one of its major components. However, oil manufacturers remove as much of the wax as possible during the oil refining process, since the wax offers no benefit to motor oil, but it's valuable for making other products. That said, some wax does remain; it's simply too expensive and inefficient to keep re-purifying the oil to remove all possible traces of paraffin. It is a naturally cross-modal task with video and audio (i.e., of visual and auditory modalities) as input. In this paper, we consider multi-modal fusion in a generation task, i.e., audio-driven talking-face video generation. For this task, a direct way is to treat multi-modal input as different features. To align these features, we can rearrange the audio features as additional channels of image frames and concatenate them with the image features. However, this method maps the audio feature elements to fixed locations, and as we will later show in our experiments presented in Section VI-D, it only works under special conditions where all the frames are aligned (i.e., each frame containing a frontal face at a fixed position), which are difficult to meet in practice. Facial landmarks are highly correlated to expression but also sensitive to head pose, view angle and scale. Therefore, it is necessary to align input photo/frames with a standard face, which has challenges dealing with the following: (1) facial image fusion with background, (2) head motion and (3) extreme head pose. coronavirus usa

















































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