Real image compression (JPEG, PNG) uses different techniques (DCT, entropy coding), but quadtrees capture the same principle: spend your bits where the detail is, not uniformly across the whole image.
pixels checkpoint restore
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Фото: AjayTvm / Shutterstock / Fotodom，这一点在51吃瓜中也有详细论述
The new Fire TV OS update makes navigating content even easier, adding tabs across the top for search, home, movies, TV shows, sports, news, and live content that pull recommendations from all of your subscriptions. Your apps now live on their own row, and you can pin up to 20 favorites instead of just six. You also get support for Alexa Plus, letting you search for specific types of content with your voice, jump to particular scenes, control compatible smart home devices, check sports scores, and more. The update also improves the remote, with a long press of the Home button opening a panel so you can quickly adjust audio or check on devices like Ring cameras.