WO2025202987 - FILM GRAIN REPETITIVE PATTERN SCORING
National phase entry is expected:
Publication Number
WO/2025/202987
Publication Date
02.10.2025
International Application No.
PCT/IB2025/053293
International Filing Date
28.03.2025
Title **
[English]
FILM GRAIN REPETITIVE PATTERN SCORING
[French]
NOTATION DE MOTIF RÉPÉTITIF DE GRAIN DE FILM
Applicants **
IMAX CORPORATION
Inventors
YEGANEH, Hojatollah
SARVESTANI, Armin Shafiee
Priority Data
63/571,623
29.03.2024
US
Application details
| Total Number of Claims/PCT | * |
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International Searching Authority |
CIPO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| * | |
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2639 | |
| EPO | Filing, Examination, Granting | 20371 | |
| Japan | Filing, Examination, Granting | 2711 | |
| South Korea | Filing, Examination, Granting | 3149 | |
| USA | Filing, Examination, Granting | 7140 |
Total:
36,010
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Abstract[English]
Grain pattern quality assessment (GraPQA) is performed. Mean filtering is performed on a luminance channel of an input frame to generate a mean frame. The mean frame is subtracted from the input frame to create a mean-subtracted frame. Local similarity correlation measurements are performed between the mean-subtracted frame and a film grain template. Results of the local similarity correlation measurements are scored to generate a grain pattern quality score for the input frame.[French]
Une évaluation de qualité de motif de grain (GraPQA) est effectuée. Un filtrage de moyenne est effectué sur un canal de luminance d'une trame d'entrée pour générer une trame moyenne. La trame moyenne est soustraite de la trame d'entrée pour créer une trame à moyenne soustraite. Des mesures de corrélation de similarité locale sont effectuées entre la trame à moyenne soustraite et un modèle de grain de film. Les résultats des mesures de corrélation de similarité locale sont notés pour générer un score de qualité de motif de grain pour la trame d'entrée.