Method for processing digital image data
AssigneeSony Deutschland GmbH
InventorsPiergiorgio Sartor, Altfried Dilly
Life of this patent
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Abstract
A method for processing digital image data (ID) is proposed wherein a step (B) of processing digital image data (ID) comprises or realizes a sub-step (B′) of image improvement with respect to said digital image data (ID) which uses or which is based on a process of re-mapping (REM) together with a process of dithering (DIT).
Claims22
Method for processing digital image data (ID), comprising steps of:
- (A) providing digital input image data (IID) as digital image data (ID) to be processed,
- (B) processing said digital image data (ID) in order to generate processed digital image data (PID), and
- (C) providing as a processing result said processed digital image data (PID) as digital output image data (OID),
- wherein said step (B) of processing said digital image data (ID) comprises or realizes a substep (B′) of image improvement with respect to said digital image data (ID) and
- wherein said step (B′) of image improvement with respect to said digital image data (ID) uses or is based on a process of re-mapping (REM) together with a process of dithering (DIT).
Method according to any one of the preceding claims,
- wherein said step (B) of processing said digital image data (ID) uses or is based on a process of correction.
Method according to any one of the preceding claims,
- wherein said step (B) of processing said digital image data (ID) uses or is based on a process of linearity correction (LIN).
Method according to any one of the preceding claims,
- wherein said step (B) of processing said digital image data (ID) uses or is based on a process of correction for luminance.
Method according to any one of the preceding claims,
- wherein said step (B) of processing said digital image data (ID) uses or is based on a process of correction for chrominance.
Method according to any one of the preceding claims,
- wherein said process of re-mapping uses or is based on a re-mapping function or re-mapping curve.
Method according to any one of the preceding claims,
- wherein the re-mapping function or re-mapping curve is given by a functional relation f according to a general formula
- out(j):=f(in(j)), e.g. by out(j):=m·in(j)+b,
- with m, b being real numbers, connecting input values in(j) and output values out(j).
Method according to any one of the preceding claims,
- wherein said process of re-mapping uses or is based on a lookup table table(·) according to a general formula
- out(j):=table(in(j))
- connecting input values in(j) and output values out(j).
Method according to any one of the preceding claims,
- wherein said process of re-mapping uses or is based on process of generic re-mapping.
Method according to any one of the preceding claims,
- wherein said process of re-mapping and in particular said re-mapping function or re-mapping curve are realized with an extended resolution (EP) or extended precision (EP).
Method according to any one of the preceding claims,
- wherein for each unprocessed pixel (P) of each image (I) contained in said digital image data (ID) to be processed a processing error (E) is determined and
- wherein said processing error (E) is diffused or distributed over unprocessed pixels (P′) within a given neighbourhood of said unprocessed pixel (P) of said respective image (I).
Method according to any one of the preceding claims,
- wherein a transfer function is determined, truncated to a native or canonical precision but still represented in extended precision and then re-mapped back with an extended precision.
Method according to any one of the preceding claims,
- wherein said digital image data (ID) to be processed contain or represent one single image (I) or a pluarilaty of single images (I).
Method according to any one of the preceding claims,
- wherein said digital image data (ID) to be processed contain or represent one sequence of images (I) or a pluarilaty of sequence of images (I), e.g. a video stream.
Dependencies are inferred from the claim text.