Image Processing Apparatus Reducing Facial Shine via HSV Segmentation
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Solution Overview
Problem
Existing image processing methods fail to effectively reduce the shine component in facial images, especially when flash lighting is used, as they expand the shine area during the whitening process, making it difficult to minimize unnatural gloss.
Innovation Solution
An image processing apparatus and method that detects a predetermined color area based on saturation and brightness, adjusts the hue, saturation, and brightness of specific pixels to reduce the shine component in facial images, utilizing a digital camera with image processing units that convert images between RGB and HSV color spaces to identify and correct shine areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a whitening process is carried out by generating a bokeh image to increase brightness of facial areas, then the brightness of the face is improved, but the shine component area is expanded making it impossible to reduce shine
Solution Approach 1:
The patent segments the facial image into multiple regions based on skin color and distinguishes between flesh tone areas and shine areas. By detecting saturation and brightness characteristics, the system separates the shine component from the normal skin tone, allowing independent processing of each region to eliminate the harmful shine effect while preserving natural skin appearance.
Solution Approach 2:
The patent applies different processing strategies to different regions of the face. Normal skin areas receive standard whitening processing, while detected shine areas receive specialized processing that reduces brightness and adjusts saturation specifically针对 the shine component. This local differentiation allows brightness improvement in non-shine areas without expanding the harmful shine region.
2Illumination intensity
If flash lighting is used to illuminate the subject, then the image brightness is improved, but unnatural gloss and shine components are produced on the face
Solution Approach 1:
The patent converts the harmful shine effect caused by flash lighting into a detectable pattern with specific saturation and brightness characteristics. By identifying these characteristics, the system can then apply targeted processing to remove the shine while preserving the beneficial illumination effects on normal skin areas, effectively transforming the flash-induced problem into a solvable detection task.
Solution Approach 2:
The patent changes the processing parameters (brightness and saturation) specifically for detected shine areas rather than applying uniform processing. By adjusting these parameters differently for shine regions compared to normal skin regions, the system eliminates unnatural gloss while maintaining the overall brightness improvement achieved through flash lighting.
Data Source
AI summary
An image processing apparatus, including: an image obtaining means that obtains an image; a color area detecting means that detects a predetermined color area from the image thus obtained by the image obtaining means; an area specifying means that specifies an area to be adjusted based on saturation and brightness of the color area thus detected by the color area detecting means; and a color adjusting means that adjusts at least one of a hue, the saturation and the brightness of a pixel in the process area thus specified by the area specifying means.