Curious how good your eyesight is? Take a look at this image. Who do you see? If you're at a normal viewing distance from the screen and have decent eyesight, you should be seeing Albert Einstein. However, if you see Marilyn Monroe, you may wanna consider wearing glasses or contacts.
好奇你的視力多好嗎？看看這張圖。你看到誰？如果你離螢幕正常距離觀看且視力不錯，你應該會看到愛因斯坦。不過，如果你看見瑪麗蓮夢露，你可能會想考慮配戴眼鏡或隱形眼鏡。
Wearing your glasses right now? Try taking them off, and the image may change. Or if you're near somebody else, ask them what they see. The effect can actually be seen by anyone if we change the distance or size of the picture. If it's far away, you're more likely to see Marilyn Monroe, as our eyes only pick up the broader strokes of an image from a distance. But as you come closer to the image, you see the finer details of Einstein. We promise we haven't changed anything digitally.
現在正戴著你的眼鏡嗎？試著拿下眼鏡，那圖片可能會改變。或如果你在其他人附近，問問他們看見什麼。如果我們改變圖片的距離或大小，那效果其實能被任何人看見。如果圖片離很遠，你比較有可能看到瑪麗蓮夢露，因為我們的眼睛從遠處看時只會看到比較粗的線條。但當你靠圖片近些，你看見愛因斯坦比較清楚的細節。我們保證，我們沒有數位修改任何東西。
In fact, pause this video now and try walking away from your computer screen. Chances are the image will change, and at a different distance than your friends, because our eyes are all slightly different. The further away you can stand and still see Einstein, the better your eyes likely are. You can achieve the same effect by squinting your eyes to blur the photo.
事實上，現在暫停這支影片然後試著從電腦螢幕走開。圖片很可能會改變，而且和你的朋友會在不同的距離改變，因為我們的眼睛全有點不同。你能站越遠且依然看見愛因斯坦，你的眼睛可能就越好。你可以瞇眼讓照片變模糊來達到相同效果。
So, what's going on? Well, this image is an example of a hybrid image, whereby a low spatial frequency of one picture is combined with a high spatial frequency of another. But depending on how well you're able to focus or pick up contrast, your eye will only pick out certain details. Up close we're generally able to see fine details like Einstein's mustache and wrinkles, but as the distance increases, or if your vision is poor and thus creates a more blurred image in the first place, your ability to pick up details fades away. Instead, you only see the general features like the shape of a mouth, nose, and hair, making it seem like Marilyn Monroe.
那麼，發生了什麼事？這個嘛，這張圖是合成圖的例子之一，靠混合一張低空間頻率的圖片與一張高空間頻率圖片所製成。不過取決於你能夠多麼專注或注意到對比，你的眼睛只會辨認出特定細節。靠近些我們通常能看見細部的地方，像是愛因斯坦的鬍子和皺紋，不過當距離增加，或假如你的視力很差因此一開始就創造出比較模糊的圖像的話，你注意到細節的能力就會變弱。取而代之地，你只會看見像是嘴巴、鼻子還有頭髮的形狀這樣大略的特徵，使圖片看起來像瑪麗蓮夢露。
Love tricking your brain with illusions? We've put together a playlist of our favorite ones that you can watch by clicking the screen. Don't forget to follow us on Facebook, Instagram, and Twitter, and subscribe for more weekly science videos.
喜歡用錯覺欺騙你的大腦嗎？我們列了一個我們最喜歡的錯覺影片的播放清單，點擊螢幕你就可以看了。別忘了在 Facebook、Instagram 和 Twitter 上追蹤我們，還有訂閱以觀看更多每週科學影片。
- 「看一看」- Take A Look At
Take a look at this image.
看看這張圖。 - 「從遠處」- From A Distance
...as our eyes only pick up the broader strokes of an image from a distance.
...因為我們的眼睛從遠處看時只會看到比較粗的線條。 - 「取決於、視某事物而定」- Depend On
But depending on how well you're able to focus or pick up contrast, your eye will only pick out certain details.
不過取決於你能夠多麼專注或注意到對比，你的眼睛只會辨認出特定細節。 - 「能夠」- Be Able To
But depending on how well you're able to focus or pick up contrast, your eye will only pick out certain details.
不過取決於你能夠多麼專注或注意到對比，你的眼睛只會辨認出特定細節。 - 「一開始、起初」- In The First Place
...or if your vision is poor and thus creates a more blurred image in the first place, your ability to pick up details fades away.
...或假如你的視力很差因此一開始就創造出比較模糊的圖像的話，你注意到細節的能力就會變弱。 - 「逐漸消失、變弱」- Fade Away
...or if your vision is poor and thus creates a more blurred image in the first place, your ability to pick up details fades away.
...或假如你的視力很差因此一開始就創造出比較模糊的圖像的話，你注意到細節的能力就會變弱。
