Portrait Image Generation with Direction-Aware Shading Lines
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Solution Overview
Problem
Existing portrait creation devices degrade the expressiveness of portrait images when faced with rotated faces, as they fail to accurately represent the shades according to the rotation direction of the face.
Innovation Solution
An image processing device and method that acquires a face image, specifies the face direction, and adds a picture expressing the contour of face components based on the specified direction, enhancing the expressiveness of the portrait by incorporating lines that reflect the rotation direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a portrait image is created from a photographic image using binarization process, then the portrait image can be generated efficiently, but the expressiveness of the portrait image is degraded when the face is rotated because lines expressing shades according to the rotation direction are not drawn
Solution Approach 1:
The patent applies preliminary action by detecting the face direction before creating the portrait image. The system determines the orientation of facial features (eyes, nose, mouth) and pre-calculates the appropriate rotation angle. This allows the binarization process to subsequently apply correct shading lines that match the face rotation, thereby maintaining expressiveness while preserving efficient automated processing.
2Manufacturing precision
If lines expressing shades according to the rotation direction of the face are added to the portrait image, then the expressiveness of the portrait image is improved, but the complexity of the image processing increases
Solution Approach 1:
The patent segments the image processing into distinct functional modules: face detection module, direction determination module, and line addition module. Each module performs a specific task - detecting facial features, calculating rotation direction, and adding appropriate shading lines. This segmentation makes the complex processing manageable and systematic, reducing overall system complexity while achieving improved expressiveness.
Solution Approach 2:
The system employs feedback by using the detected face direction information to guide the addition of shading lines. The direction determination results are fed back into the image generation process, allowing the system to automatically adjust the orientation of shading lines according to the actual face rotation. This feedback mechanism ensures accuracy without requiring manual intervention or complex trial-and-error processing.
Data Source
AI summary
An image processing device is provided with an acquiring unit configured to acquire a face image and, a control unit configured to specify a face direction in the face image acquired by the acquiring unit and add, based on the specified face direction, a picture expressing a contour of a face component to the face image.