Comment choisir sa résolution d'image vidéo sur la caméra Insta360 X4 ? 8K vs 5,7K+ vs 5,7K Comparatif de la qualité d'image. Quelle est la technologie derrière ? Oversampling vs Pixel binning.
👇 Infos trouvés pour vous aider à comprendre 👇
☑️ insta360 tech support answer:
"In order to provide more resolution options, in addition to 8k, we have also added 5.7K+; the image quality of 5.7k+ will be slightly lower than 8k, but higher than 5.7k.
1. Comparison between 5.7k+ and 8k: 8k has a higher resolution and clearer image quality than 5.7k+. However, the 5.7K+ material file is smaller and has better compatibility with devices.
2. Comparison between 5.7k+ and 5.7k: Although the encoding resolution parameters are the same, the number of pixels sampled by the original image sensor at the two levels is different. 5.7K+ uses full-pixel sampling encoding, and 5.7K uses 4-in-1 pixel sampling. Encoding, so the final image quality of 5.7k+ will be better than 5.7k.
If your camera can shoot 8k but is recording in 4K, there are essentially two ways to scale the image down: oversampling and line skipping."
☑️ Explication de Nika de Insta360 sur Reddit
The X4 camera indeed uses true 8K, which is derived from an 11K oversampling process.
Regarding the issue you've mentioned, due to low-light conditions, the camera sensor needs to increase its sensitivity (ISO) to ensure the image is adequately bright. However, increasing the sensitivity also leads to more noise and a grainier picture.
The 8K setting, compared to standard modes, has a higher resolution with more pixels, meaning that each pixel has a smaller area sensitive to light, and therefore requires more light intake. If this does not meet your expectations, we recommend shooting in the 5.7K mode. After exporting through the Insta360 App or Insta360 Studio, you should notice a significant reduction in noise. Additionally, we suggest using the 8K shooting mode in well-lit environments to achieve the best results.
☑️ Commentaire intéressant sur vidéo de Eat & Sleep 360
5.7K: sensors downscale the image, less work for the processor which enables 60fps
5.7k+: processor downscales the image. Uses more computation and battery, limited to 30fps. Can apply higher quality noise reduction and scaling.
In order to support 60fps, the 5.7k mode configures the sensors themselves to downscale the image.
That way, it takes less ressources for the processor to process the color, apply noise reduction and encode the result to h265, and it can do so at 60fps.
The sensors themselves doing downscaling to a lower resolution is called "pixel binning"
In 5.7k+ mode, the sensors are configured like in 8k mode. Image processing is the same as the 8k mode, but the result is scaled down before being encoded into a h265 video.
That's why the same framerate limit as 8k apply. Its essentially the same until the last processing step.
☑️ Vidéo de Damien Bernal qui explique très bien les différents types de traitement d'image
• 4K : Pourquoi la qualité varie ?
Sommaire :
00:00 Introduction
00:34 Comparaison 8k vs 5,7k+ vs 5,7k
01:24 Oversampling X4
02:00 Pixel Binning X4
02:56 Intérêts du 5,7K+
03:09 Tailles des fichiers
03:27 Quelles résolutions choisir ?
03:47 Conclusion
Liens d'affiliations achats caméras Insta360
▶ Insta360 X4 : https://www.insta360.com/sal/x3?utm_t...
Prix : 559,99€TTC
▶ Insta360 X3 : https://www.insta360.com/sal/x3?utm_t...
Prix : 539,99€TTC
Lien d'affiliation qui donne droit à une canne à selfie gratuite
▶ Insta360 X2 : https://www.insta360.com/sal/x3?utm_t...
Prix : 539,99€TTC
Lien d'affiliation qui donne droit à une canne à selfie gratuite
▶ Insta360 ONE RS 360 1 pouce : https://store.insta360.com/product/on...
Prix : 939,99€TTC
Lien d'affiliation qui donne droit à une canne à selfie gratuite
▶ Insta360 Ace Pro : https://www.insta360.com/sal/ace-pro?...
Prix : 479,99€TTC
Lien d'affiliation qui donne droit à une canne à selfie gratuite
N'hésitez pas à commenter si vous avez une question. Vous pouvez également me contacter par e-mail [email protected]
✅ Découvrez mon guide sur les meilleures caméras 360 degrés 💪 Nouvelle version 2024 avec une page spéciale des accessoires indispensables 👍 C'est gratuit ! A télécharger sans hésiter 👉 https://fabiencaptainvirtuality.podia...
360 amicalement
Fabien
-------------------------------------------------------------------------------------------------------
Je suis Fabien, j'ai créé Captain Virtuality pour vous aider à choisir et utiliser les caméras 360 degrés. Vous pouvez également me suivre sur :
▶ Instagram : / captainvirtuality
▶ Facebook : / captainvirtuality
▶ Rejoignez le groupe Facebook caméras 360 toutes marques / 2494308313981155
#insta360 #insta360x4
Информация по комментариям в разработке