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 20):
Method for encoding high dynamic range images, comprising the steps of:\n a) acquiring a high dynamic range image in floating point format, wherein each color channel of the high dynamic range image is coded with N bits; b) calculating the dynamic range of the acquired image; c) calculating the image average luminance; d) calculating a parameter dynamic_range by adding to the dynamic range value calculated at step b) a predetermined value if the average luminance value calculated at step c) is higher than a predetermined threshold, or by subtracting the predetermined value from the dynamic range if the average luminance value calculated at step c) is equal or lower than said predetermined threshold, wherein the predetermined value is 1, wherein step d) is performed if average luminance is higher than a predetermined minimum value, particularly 0.01; e) multiplying the values of the pixels of the acquired image by a factor equal to 2 \u2212dynamicrange ; 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 to M, where M<N, the number of bits used for encoding each color channel of the acquired image by multiplying the pixel values calculated at step f) for a value ((2 power M)\u22121) thereby converting the high dynamic range image in a lower dynamic range image having a format with a dynamic range lower than that of the acquired image; and 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): 0.4403115459262739
- 35 USC 102 Novelty (BERT): 0.5016246241437433
- Combined Prediction Score: 0.4464428537480208
- Mean Citation Score: 232.064494
- Max Citation Score: 243.225
- Similarity Product: 179.26192528009415

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