Tag Archives: camera

Netflix 對於拍攝影片的要求

Netflix 對於拍攝影片的要求直接放在網站上:「Production and Post-Production Requirements v2.1」。 Provide a set of technical requirements for production and post-production workflows to ensure that a high level of quality is maintained throughout the lifecycle of a project from capture to archive. This serves the … Continue reading

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利用手機的 sensor 取得 PIN 碼

把 side-channel information 配合上統計方法就可以達到 74% 的正確率:「Phone Hack Uses Sensors To Steal PINs」。 透過 browser 的 javascript 就可以拉出這些資料,然後利用這些資料去猜你的手機 PIN 碼: Researchers from U.K.-based Newcastle University created a JavaScript app called PINlogger.js that has the ability to access data generated by the … Continue reading

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夜視功能

在「Incredible low-light camera turns night into day」這邊看到這個示範影片: 軍用品,換算 ISO 可以達到 5M: The camera was developed for military use, has an effective ISO rating of 5,000,000, and has a comically long name: “X27 Reconnaissance Day/Night high Fidelity true real time low … Continue reading

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D-Link 因為路由器與網路鏡頭不夠安全,被美國聯邦貿易委員會告

FTC 對於 D-Link 產品的安全性不符合宣稱而告下去了:「FTC sues D-Link over router and camera security flaws」。 D-Link claimed its routers were “EASY TO SECURE” with “ADVANCED NETWORK SECURITY,” but the FTC says the company failed to protect its routers and cameras from widely known … Continue reading

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Dropbox 的 Document Detecting

Dropbox 發表了他們所研究的 Document Detecting 技術:「Fast and Accurate Document Detection for Scanning」。 他們希望抓出這張圖裡面「文件」的「邊緣」: 用 Canny edge detector 會跑出這樣,很明顯多了很多不太正確的邊線,對於後續判斷上會困難不少: 剛好也是最近看到的另外一篇文章「Image Kernels Explained Visually」在講 Image Kernel,有些地方有點類似的東西,交叉看頗有感覺的... Anyway,Dropbox 最後的成果很不錯啊,可以看示範:

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利用 MAC address 抓出網路攝影機 (AirBnB 事件後續的反制)

之前 AirBnB 的屋主在屋內安裝攝影機而打官司的事情繼續被討論:「Beware, houseguests: Cheap home surveillance cameras are everywhere now」。有人提出自救方法,作者使用 DropCam 與 Withings 的 MAC Address Prefix 抓出網路攝影機:「Detect and disconnect WiFi cameras in that AirBnB you’re staying in」。 由於 MAC address 不需要知道 WPA passphase,所以可以直接掃出來。作者提供的程式需要使用 airmon-ng 來掃無線網路。 另外作者有點出這個方法可以打掛透過無線網路的裝置 (像是 WiFi … Continue reading

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D-Link 的 open source package 內包含了拿來簽名用的 Private Key

D-Link 在 DCS-5020L 的 open source package (因 GPL 要求) 裡放了簽名用的 private key:「D-Link spilled its private key onto the web – letting malware dress up as Windows apps」。 而這把 key 由 Verisign 所簽,因此被 Windows 所信任,所以這把 key 可以用來簽 malware: 而不幸的是,這把 key … Continue reading

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遊戲捲頁的理論與實作

文章的標題「Scroll Back: The Theory and Practice of Cameras in Side-Scrollers」,裡面圖又大又多,20Mbps 的光世代全速下載要跑滿一分鐘才能抓完。 順便測一下 Imgur 的 mp4,以及 HTML5 的 video tag。 裡面考了不少古啊,把捲頁的方式分成許多類別...

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不需額外吃電的數位相機

Slashdot 上看到不需額外吃電的數位相機:「Researchers Design a Self-Powered Digital Camera」,原始的報導出自「This Digital Camera Doesn't Need a Battery Because It Powers Itself」這篇,另外有 PDF 論文可以看:「Towards Self-Powered Cameras」。 目前是原型機,只有 30x40 的解析度 (看影片應該是有一定程度的灰階能力?)。依照文章所說的,如果技術再成熟一點就會對 IoT 影響蠻大的?

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網路上使用預設密碼的攝影機...

從「Website Peeps Into 73,000 Unsecured Security Cameras Via Default Passwords」看到的,有人掃過一輪後,把大約七萬多個攝影機的資料做成網站:「Online IP netsurveillance cameras of the world」。 隨便找一個台灣的:「73454」,網站速度不快,但看起來超歡樂的...

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