Video Editing
First, we test our video editing method on a realistically rendered animation of the San Miguel 3D scene, 100 frames, and 1280×960, using Metropolis light Transport with the PBRT rendering engine. This example includes intricate geometry, SVBRDFs, outdoor lighting, and an intricate camera trajectory, making it representative enough to approximate a real-world example in that it provides a ground truth decomposition while serving another useful purpose. Our method generates output that stacks up well to the ground truth, best social media pro video editing is much more accurate than the current best single-image solution proposed by the state-of-the-art competitor, Zhao. Finally, we compare the proposed approach with the contemporary solution in the video set.
Like us, they also make use of user input to resolve difficult regions, but unlike us, this user input is defined on the first frame, and the solution is broadcast to the remaining video frames. Furthermore, their approach takes hours instead of being able to allow any form of interaction, unlike our approach, which allows interaction with the user input to refine the solution. Furthermore, the user can annotate different frames quickly with our approach, which is appropriate for large camera and scene movements.
Methods designed specifically for images are not suited, best video editors agency in uae, and independent processing of each frame using such methods often results in temporal inconsistencies. Our technique produces temporally consistent outputs that do an excellent job of capturing the reflectance-illumination separation. To demonstrate the stability of our method, we track 100k pixels that should have constant reflectance and no motion across a video. The average derivative of these reflectance values. If our temporal consistency is good, freelance video editing services in uae, then this should be close to zero.
Our algorithm assumes monochromatic lighting. This accelerates the algorithm, and we find that this leads to accurate decompositions for most videos where this assumption is close. However, when there is illumination with spatially varying colors or with strong colored inter reflections, this leads to artifacts as well as pink interreflections on the girl’s arms. This assumption can be violated by high-frequency lighting effects due to hard cast shadows or high-frequency geometry, and in such cases, video editing company in uae, our technique outputs an overly-smooth shading layer.
This can also be seen, for example, where high-frequency residual shadows can be viewed in the reflectance, where our illumination is smooth compared to other approaches. While our non-local constraints help mitigate this issue to an extent by forcing high-frequency achromatic variations out of the reflectance and into the illumination, more user interaction is often needed in practice for such cases.
In general, the decomposition we get by employing the approach of Ye et al. with user interaction is more precise compared to that which we method with no user interaction. However, professional video editor services in uae is at the cost of higher computation that grossly slows down iteration time for correcting artifacts vs. our interactive method.
In some of our early experiments, we also examined temporal propagation both forward and backward in time. We did not find a significant. This came at the cost of additional user interaction since one needed to take a step forward and backward to verify the results.
Comparatively, pro video editing studio the forward propagation in time yields a simpler workflow where one has to process the frames in chronological order only.
To edit the reflectance value of a video for an object is easy when the value is of constant color; in such a scenario, only a chrominance edit needs to be done. When in actuality, the reflectance value has high frequencies, and they are coupled in both luminance and chrominance values, too. To paint over it directly is not feasible because this will affect illumination values.
We point out how, with our decomposition, painting in the reflectance image will actually affect illumination values because illumination will remain unchanged. We will point out in both of these examples how reflectance values have high frequencies in both luminance and chrominance components. With our decomposition method, video production company in uae painting the original reflectance image will allow us to paint over it successfully because illumination values remain unchanged in the scenario of complex motion.
Lighting editing
Translating hard shadows to soft shadows can be a complex operation if one has available only the raw data, since blurring the shadows will have an impact of smoothing the textures in the environment. However, this is simplified by our decomposition, best video editor where one requires only lighting to be blurred.
Lighting-consistent video composit
Directly compositing the videos having shadows, Naive composition, gives ugly outputs where the shadows cast onto the resultant are layered rather than merged. Our decomposition technique makes the right merger possible. min S1, S2, the calculation of the new shading layer, is done within a segmentation of the foreground video obtained through software such as Video Snapcut, for example:
Conclusions
In this contribution, we introduced the first algorithm to compute the intrinsic decomposition of video sequences interactively. In our approach, we are leveraging a hybrid algorithm to compute the reflectance and lighting gradients with respect to an input image and presented a fast solver to reconstruct temporally consistent lighting and reflectance from these gradients professional video editing services. The interactive nature of our solver makes a big difference from prior work and lets the user explore the parameter space of the algorithm and create annotations while immediately seeing feedback.
Our approach can be applied to obtain high-quality intrinsic decompositions in a very efficient manner on a large variety of real-world video sequences. Most importantly, dubai video editing agency our decomposition allows for a number of editing applications that would otherwise be hard to realize: recoloring, retexturing, illumination editing, and lighting-coherent video compositing.