PATENT CLAIM ANALYSIS

Application Number: 15779370
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["375", "240020"]

Abstract:
The invention relates to a method for encoding high dynamic range images, both static images and video frames. The method comprises the steps of: a) acquiring a high dynamic range image in floating point format; b) calculating the dynamic range of the acquired image; c) calculating the image average luminance; d) calculating a parameter dynamic_range by adding to or subtracting from the dynamic range value calculated at step b) a predetermined value, the addition or subtraction of such predetermined value depending on image average luminance calculated at step c); e) multiplying the values of the pixels of the acquired image by a factor equal to 2−dynamic_range; f) raising to a power equal to 1.0/(2.2+add_gamma) the values of the pixels calculated at step e), where add_gamma is a value higher than or equal to zero; g) reducing the number of bits used for encoding the image pixels such to convert the image in a format with a dynamic range lower than that of the acquired image; h) compressing the lower dynamic range image. The invention relates also to a corresponding image decoding method and to devices for encoding and decoding images and videos.

Claim (Index 11):
Method for encoding a video comprising a plurality of images, wherein for each image of said plurality of images the following steps are performed:\n a) acquiring a high dynamic range image in floating point format; b) calculating the dynamic range of the acquired image; c) calculating the image average luminance; d) calculating a parameter dynamic_range by adding to or subtracting from the dynamic range value calculated at step b) a predetermined value, the addition or subtraction of such predetermined value depending on image average luminance calculated at step c); and wherein the method further comprises the steps of:\n calculating the parameter dynamic_range as the average value of the parameters dynamic_range calculated for each image of said plurality of images, and \n encoding each image of said plurality of images by implementing for each image the following steps: \n e) multiplying the values of the pixels of the acquired image by a factor equal to 2 \u2212dynamic _ range _ avg ; \n f) raising to a power equal to 1.0/(2.2+add_gamma) the values of the pixels calculated at step e), where add_gamma is a value higher than or equal to zero; \n g) reducing the number of bits used for encoding the image pixels such to convert the image in a format with a dynamic range lower than that of the acquired image; and \n h) compressing the lower dynamic range image.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 93.0
- Lexical Diversity: 2.41758
- Patent Class: 375.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15306873', '12160738', '14414153', '13961266', '14903630']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4402819692405109
- 35 USC 102 Novelty (BERT): 0.5017574537849699
- Combined Prediction Score: 0.4464295176949568
- Mean Citation Score: 232.064494
- Max Citation Score: 243.225
- Similarity Product: 178.93886656165122

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test