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唉, 這消息為葛博士的孤陋寡聞再添一筆。這 TinEye 能夠「以圖找圖」,其精準的程度另我嘆為觀止, 如果你也想要嘆為觀止一下, 那麼請看以下影片: 如果看完影片你對它所宣稱的大能感到懷疑,但卻礙於時間而無法一一試驗, 那麼, 請點下面連結進去, 閱讀葛博士秉持學術研究的精神所作的徹底實驗! 我先用 哈利波特 的書皮封面試試, 果然效果很好, 有 141筆結果在不到0.1秒的時間內被找出, 接著我改用先前測試 Evernote 這套軟體的文字辨識能力時所拍的照片 很可惜, 沒有結果。大概是 TinEye沒有辦法準確的區分前景跟背景的關係吧, 所以當我將圖片裁切過後, 便順利的搜索出 14筆結果: 接下來我拿了其他的書來試試看, 這樣子也能夠分析,而且第一筆就順利的找到 網路書店去, 很不容易。 接下來就要測試「部份圖片」能不能正確搜尋到。首先就拿一開始的哈利波特火鳳凰來試試: 從這個第一頁的結果看起來好像很可惜, 它趨向於找出完全吻合的圖片, 而沒有猜到這張圖片是從書皮封面裁切出來的。但仔細看就會發現,從第3頁(總共14頁)就開始"逐漸"出現完整的書皮封面圖片: 從第3頁之後,就幾乎都是書的封面圖片了。 值得注意的是, 果然如同影片所宣傳的, 連變造過的圖片都會被搜索進來, 而且還能排在第4頁的位置: 再來,這次測試最另我驚訝的一次結果出現了。 底下這張圖有兩個很糟糕的條件,其一為這是部份圖片,另一個是圖片的光源很不穩定,顏色也不正確,但 TinEye 卻正確的搜尋出 7 個結果, 花費不到0.05秒的時間! 你大概會覺得奇怪, 為什麼我要都用書的封面來做測試? 這與我未來的某個計畫有關, 而且總地來說, 也比隨便找、隨便照要來得容易測試。 除此之外, 像這張照片的搜尋結果也是很驚人, 可見它應該有去做分區的搜尋: 這一次的測試結果很另我印象深刻, 所以難得在這裡用這麼多圖片說明這整個過程。 這故事(技術)告訴我們,以後要在部落格上面用圖片的時候要小心呀! 底下這個例子是博士班學弟的知名部落格, 他一向有為精彩文章放置插圖的習慣, 例如下面這篇他就放了一個漂亮的「道聽塗說」圖: 但是有心人士只要一用 TinEye 搜尋, 馬上就會發現這張圖的出處,而且還能馬上發現這張圖真算是廣為流傳啊... 幸好這位 堯同學 除了勤於使用網路圖片之外, 也同時保持了維持原始圖片超連結的好習慣, 這樣一來至少有心人士要對你不利的時候, 你還可以把責任推給別人:「是他! 是他先偷用的, 不是我。」 未來你如果要偷用無名小站的正ㄇㄟ相簿圖片,或者甚至是哪個恐龍要拿美女照片欺騙世人,都有最新的技術可以將你識破, 雖然這次的測試是有發現到該網站的圖片資料庫還尚未完整, 不過假以時日,讓他們有足夠的錢、足夠的主機、足夠的時間, 我想未來圖片在網路上流傳的方式即將大為改變, 以後也就請務必小心了。不過為了維持「除某人以外的ㄇㄟ照不在本格置放」的規則, 我在這裡就不就正妹照片進行測試了。:p
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