61 lines
2.5 KiB
Protocol Buffer
61 lines
2.5 KiB
Protocol Buffer
// Copyright 2020 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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syntax = "proto2";
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package mediapipe.face_geometry;
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import "mediapipe/framework/formats/matrix_data.proto";
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import "mediapipe/modules/face_geometry/protos/mesh_3d.proto";
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option java_package = "com.google.mediapipe.modules.facegeometry";
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option java_outer_classname = "FaceGeometryProto";
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// Defines the face geometry pipeline estimation result format.
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message FaceGeometry {
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// Defines a mesh surface for a face. The face mesh vertex IDs are the same as
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// the face landmark IDs.
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//
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// XYZ coordinates exist in the right-handed Metric 3D space configured by an
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// environment. UV coodinates are taken from the canonical face mesh model.
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//
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// XY coordinates are guaranteed to match the screen positions of
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// the input face landmarks after (1) being multiplied by the face pose
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// transformation matrix and then (2) being projected with a perspective
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// camera matrix of the same environment.
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//
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// NOTE: the triangular topology of the face mesh is only useful when derived
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// from the 468 face landmarks, not from the 6 face detection landmarks
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// (keypoints). The former don't cover the entire face and this mesh is
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// defined here only to comply with the API. It should be considered as
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// a placeholder and/or for debugging purposes.
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//
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// Use the face geometry derived from the face detection landmarks
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// (keypoints) for the face pose transformation matrix, not the mesh.
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optional Mesh3d mesh = 1;
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// Defines a face pose transformation matrix, which provides mapping from
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// the static canonical face model to the runtime face. Tries to distinguish
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// a head pose change from a facial expression change and to only reflect the
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// former.
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//
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// Is a 4x4 matrix and contains only the following components:
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// * Uniform scale
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// * Rotation
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// * Translation
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//
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// The last row is guaranteed to be `[0 0 0 1]`.
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optional MatrixData pose_transform_matrix = 2;
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}
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