US Patent Application 18448561. ALPHA CHANNEL PREDICTION simplified abstract
Contents
ALPHA CHANNEL PREDICTION
Organization Name
Inventor(s)
Maryla Ustarroz-calonge of Paris (FR)
ALPHA CHANNEL PREDICTION - A simplified explanation of the abstract
This abstract first appeared for US patent application 18448561 titled 'ALPHA CHANNEL PREDICTION
Simplified Explanation
The patent application is about image coding using alpha channel prediction.
- The invention involves generating a reconstructed image using alpha channel prediction.
- The reconstructed image is outputted as the result of the process.
- The process includes decoding reconstructed color channel values for a current pixel expressed in a first color space.
- Color space converted color channel values for the current pixel are obtained by converting the reconstructed color channel values to a second color space.
- An alpha channel lower bound is obtained for the alpha channel value of the current pixel using the color space converted color channel values.
- A candidate predicted alpha value is generated for the current pixel.
- An adjusted predicted alpha value is obtained for the current pixel using the candidate predicted alpha value and the alpha channel lower bound.
- A reconstructed pixel is generated for the current pixel using the adjusted predicted alpha value.
- The reconstructed pixel is included in the reconstructed image.
Original Abstract Submitted
Image coding using alpha channel prediction may include generating a reconstructed image using alpha channel prediction and outputting the reconstructed image. Generating the reconstructed image using alpha channel prediction may include decoding reconstructed color channel values for a current pixel expressed with reference to first color space, obtaining color space converted color channel values for the current pixel by converting the reconstructed color channel values to a second color space, obtaining an alpha channel lower bound for an alpha channel value for the current pixel using the color space converted color channel values, generating a candidate predicted alpha value for the current pixel, obtaining an adjusted predicted alpha value for the current pixel using the candidate predicted alpha value and the alpha channel lower bound, generating a reconstructed pixel for the current pixel using the adjusted predicted alpha value, and including the reconstructed pixel in the reconstructed image.
