US 11,895,335 B2
Image processing method and image processing apparatus
Matthias Narroschke, Schaafheim (DE); and Thomas Wedi, The Hague (NL)
Assigned to SUN PATENT TRUST, New York, NY (US)
Filed by Sun Patent Trust, New York, NY (US)
Filed on Aug. 26, 2022, as Appl. No. 17/896,382.
Application 17/896,382 is a continuation of application No. 17/147,800, filed on Jan. 13, 2021, granted, now 11,463,731.
Application 17/147,800 is a continuation of application No. 16/710,346, filed on Dec. 11, 2019, granted, now 10,924,764, issued on Feb. 16, 2021.
Application 16/710,346 is a continuation of application No. 15/010,499, filed on Jan. 29, 2016, granted, now 10,587,895, issued on Mar. 10, 2020.
Application 15/010,499 is a continuation of application No. 13/683,093, filed on Nov. 21, 2012, granted, now 9,414,064, issued on Aug. 9, 2016.
Claims priority of provisional application 61/563,695, filed on Nov. 25, 2011.
Prior Publication US 2022/0417560 A1, Dec. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/176 (2014.01); H04N 19/117 (2014.01); H04N 19/86 (2014.01); H04N 19/82 (2014.01); H04N 19/61 (2014.01); H04N 19/139 (2014.01); H04N 19/159 (2014.01)
CPC H04N 19/61 (2014.11) [H04N 19/117 (2014.11); H04N 19/139 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/82 (2014.11); H04N 19/86 (2014.11)] 3 Claims
OG exemplary drawing
 
1. An image encoding method involving filtering of image blocks using a plurality of deblocking filters having different filter strengths, the image encoding method comprising:
a first calculating step of calculating a boundary strength between two adjacent image blocks;
a second calculating step of calculating a parameter indicating an output range for each of the deblocking filters, using a linear sum of the boundary strength and a quantization parameter;
a selecting step of selecting a deblocking filter to be used in the filtering from among the deblocking filters, using one or more threshold values which are determined based on the parameter;
a filtering step of filtering the two blocks using the selected deblocking filter; and
an encoding step of encoding an image using a reconstructed image including the filtered two blocks,
wherein a value of the parameter to be calculated is larger when a value of the boundary strength is larger.