Trait opencv::prelude::DISOpticalFlow[][src]

pub trait DISOpticalFlow: DenseOpticalFlow {
Show 22 methods fn as_raw_DISOpticalFlow(&self) -> *const c_void;
fn as_raw_mut_DISOpticalFlow(&mut self) -> *mut c_void; fn get_finest_scale(&self) -> Result<i32> { ... }
fn set_finest_scale(&mut self, val: i32) -> Result<()> { ... }
fn get_patch_size(&self) -> Result<i32> { ... }
fn set_patch_size(&mut self, val: i32) -> Result<()> { ... }
fn get_patch_stride(&self) -> Result<i32> { ... }
fn set_patch_stride(&mut self, val: i32) -> Result<()> { ... }
fn get_gradient_descent_iterations(&self) -> Result<i32> { ... }
fn set_gradient_descent_iterations(&mut self, val: i32) -> Result<()> { ... }
fn get_variational_refinement_iterations(&self) -> Result<i32> { ... }
fn set_variational_refinement_iterations(&mut self, val: i32) -> Result<()> { ... }
fn get_variational_refinement_alpha(&self) -> Result<f32> { ... }
fn set_variational_refinement_alpha(&mut self, val: f32) -> Result<()> { ... }
fn get_variational_refinement_delta(&self) -> Result<f32> { ... }
fn set_variational_refinement_delta(&mut self, val: f32) -> Result<()> { ... }
fn get_variational_refinement_gamma(&self) -> Result<f32> { ... }
fn set_variational_refinement_gamma(&mut self, val: f32) -> Result<()> { ... }
fn get_use_mean_normalization(&self) -> Result<bool> { ... }
fn set_use_mean_normalization(&mut self, val: bool) -> Result<()> { ... }
fn get_use_spatial_propagation(&self) -> Result<bool> { ... }
fn set_use_spatial_propagation(&mut self, val: bool) -> Result<()> { ... }
}
Expand description

DIS optical flow algorithm.

This class implements the Dense Inverse Search (DIS) optical flow algorithm. More details about the algorithm can be found at Kroeger2016 . Includes three presets with preselected parameters to provide reasonable trade-off between speed and quality. However, even the slowest preset is still relatively fast, use DeepFlow if you need better quality and don’t care about speed.

This implementation includes several additional features compared to the algorithm described in the paper, including spatial propagation of flow vectors (@ref getUseSpatialPropagation), as well as an option to utilize an initial flow approximation passed to @ref calc (which is, essentially, temporal propagation, if the previous frame’s flow field is passed).

Required methods

Provided methods

Finest level of the Gaussian pyramid on which the flow is computed (zero level corresponds to the original image resolution). The final flow is obtained by bilinear upscaling.

See also

setFinestScale

Finest level of the Gaussian pyramid on which the flow is computed (zero level corresponds to the original image resolution). The final flow is obtained by bilinear upscaling.

See also

setFinestScale getFinestScale

Size of an image patch for matching (in pixels). Normally, default 8x8 patches work well enough in most cases.

See also

setPatchSize

Size of an image patch for matching (in pixels). Normally, default 8x8 patches work well enough in most cases.

See also

setPatchSize getPatchSize

Stride between neighbor patches. Must be less than patch size. Lower values correspond to higher flow quality.

See also

setPatchStride

Stride between neighbor patches. Must be less than patch size. Lower values correspond to higher flow quality.

See also

setPatchStride getPatchStride

Maximum number of gradient descent iterations in the patch inverse search stage. Higher values may improve quality in some cases.

See also

setGradientDescentIterations

Maximum number of gradient descent iterations in the patch inverse search stage. Higher values may improve quality in some cases.

See also

setGradientDescentIterations getGradientDescentIterations

Number of fixed point iterations of variational refinement per scale. Set to zero to disable variational refinement completely. Higher values will typically result in more smooth and high-quality flow.

See also

setGradientDescentIterations

Maximum number of gradient descent iterations in the patch inverse search stage. Higher values may improve quality in some cases.

See also

setGradientDescentIterations getGradientDescentIterations

Weight of the smoothness term

See also

setVariationalRefinementAlpha

Weight of the smoothness term

See also

setVariationalRefinementAlpha getVariationalRefinementAlpha

Weight of the color constancy term

See also

setVariationalRefinementDelta

Weight of the color constancy term

See also

setVariationalRefinementDelta getVariationalRefinementDelta

Weight of the gradient constancy term

See also

setVariationalRefinementGamma

Weight of the gradient constancy term

See also

setVariationalRefinementGamma getVariationalRefinementGamma

Whether to use mean-normalization of patches when computing patch distance. It is turned on by default as it typically provides a noticeable quality boost because of increased robustness to illumination variations. Turn it off if you are certain that your sequence doesn’t contain any changes in illumination.

See also

setUseMeanNormalization

Whether to use mean-normalization of patches when computing patch distance. It is turned on by default as it typically provides a noticeable quality boost because of increased robustness to illumination variations. Turn it off if you are certain that your sequence doesn’t contain any changes in illumination.

See also

setUseMeanNormalization getUseMeanNormalization

Whether to use spatial propagation of good optical flow vectors. This option is turned on by default, as it tends to work better on average and can sometimes help recover from major errors introduced by the coarse-to-fine scheme employed by the DIS optical flow algorithm. Turning this option off can make the output flow field a bit smoother, however.

See also

setUseSpatialPropagation

Whether to use spatial propagation of good optical flow vectors. This option is turned on by default, as it tends to work better on average and can sometimes help recover from major errors introduced by the coarse-to-fine scheme employed by the DIS optical flow algorithm. Turning this option off can make the output flow field a bit smoother, however.

See also

setUseSpatialPropagation getUseSpatialPropagation

Implementations

Creates an instance of DISOpticalFlow

Parameters

  • preset: one of PRESET_ULTRAFAST, PRESET_FAST and PRESET_MEDIUM

C++ default parameters

  • preset: DISOpticalFlow::PRESET_FAST

Implementors