FR3140724B1 - Detection et correction de pixels defectueux - Google Patents

Detection et correction de pixels defectueux Download PDF

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Publication number
FR3140724B1
FR3140724B1 FR2210277A FR2210277A FR3140724B1 FR 3140724 B1 FR3140724 B1 FR 3140724B1 FR 2210277 A FR2210277 A FR 2210277A FR 2210277 A FR2210277 A FR 2210277A FR 3140724 B1 FR3140724 B1 FR 3140724B1
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France
Prior art keywords
pixel
counter
defective
detection
threshold
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Active
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FR2210277A
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English (en)
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FR3140724A1 (fr
Inventor
Yves Michels
Calloch Thibaut Le
Mathieu Renaudat
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Safran Electronics and Defense SAS
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Safran Electronics and Defense SAS
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Priority to FR2210277A priority Critical patent/FR3140724B1/fr
Publication of FR3140724A1 publication Critical patent/FR3140724A1/fr
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Publication of FR3140724B1 publication Critical patent/FR3140724B1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/68—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to defects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/68—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to defects
    • H04N25/683—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to defects by defect estimation performed on the scene signal, e.g. real time or on the fly detection

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

Procédé de détection et correction de pixels défectueux dans des images de scène, comportant, en cas de détection (E1) d’un mouvement dans la scène, pour un pixel courant : - la prédiction (E2) du pixel, en fonction de pixels voisins sélectionnés selon une orientation de motif autour du pixel, pour déterminer un pixel prédit, - l’incrémentation d’un compteur si la différence entre le pixel et le pixel prédit est supérieure à un seuil de différence, et décrémentation du compteur sinon, - la comparaison du compteur à deux seuils haut et bas d’hystérésis, - l’attribution au pixel de l’état défectueux si le compteur est supérieur au seuil haut, ou de l’état sain si le compteur est inférieur au seuil bas, ou la conservation d’un état précédent du pixel si le compteur est entre les seuils d’hystérésis, - le remplacement (E4) du pixel s’il est défectueux, par le pixel prédit. Figure pour l’abrégé : figure 1
FR2210277A 2022-10-07 2022-10-07 Detection et correction de pixels defectueux Active FR3140724B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR2210277A FR3140724B1 (fr) 2022-10-07 2022-10-07 Detection et correction de pixels defectueux

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2210277A FR3140724B1 (fr) 2022-10-07 2022-10-07 Detection et correction de pixels defectueux
FR2210277 2022-10-07

Publications (2)

Publication Number Publication Date
FR3140724A1 FR3140724A1 (fr) 2024-04-12
FR3140724B1 true FR3140724B1 (fr) 2025-02-21

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ID=85175908

Family Applications (1)

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FR2210277A Active FR3140724B1 (fr) 2022-10-07 2022-10-07 Detection et correction de pixels defectueux

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FR (1) FR3140724B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118314139B (zh) * 2024-06-07 2024-08-16 山东巴比熊食品有限公司 一种蛋糕成型监测方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002354340A (ja) * 2001-05-24 2002-12-06 Olympus Optical Co Ltd 撮像装置
US8237825B2 (en) 2008-12-11 2012-08-07 Exelis, Inc. Pixel replacement using five nearest neighbors
US20150172576A1 (en) 2013-12-05 2015-06-18 Aselsan Elektronik Sanayi Ve Ticaret Anonim Sirketi Real time dynamic bad pixel restoration method
GB2521408B (en) * 2013-12-18 2015-12-16 Imagination Tech Ltd Defective pixel fixing
FR3028376B1 (fr) 2014-11-07 2018-01-12 Safran Electronics & Defense Sas Procede de detection de pixels defectueux.
FR3038194B1 (fr) 2015-06-26 2017-08-11 Ulis Correction de pixels parasites dans un capteur d'image infrarouge
US10440299B2 (en) * 2015-09-04 2019-10-08 Apple Inc. Correcting pixel defects based on defect history in an image processing pipeline

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Publication number Publication date
FR3140724A1 (fr) 2024-04-12

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