Put to practical use

 In general, we think trick art is just a entertainment. But trick art is put to practical use in hidden situation. The situation is almost in building. In various buildings, trick art is used to make the building more great place for spectator who visit the building.

 To begin with, in the early year when trick art was born, trick art mainly used to make the spectator feel the building is spacious or big. 

 This is "Teatro Olimpico" in Vicenza. trick art is applied to this aisle. This aisle has slope and get more and more narrow. Because of this, we feel perspective more than real.

　"Parthenon" also has trick art. In this building, to show stability, all pillars are incline to the inside, and the floor draw an arc because the center is higher than other part.

 Furthermore, the pillars have more feature. The pillars get more and more narrow as the pillar get tall. So we think Parthenon is tall than real.

 Jesuit church Vienna has Ana-morphosis. Look at the left picture. You will think the roof is domed structure. But the dome is actually picture! It is one of the Ana-morphosis. Because of it, the roof is looked higher than real.

 In Disney land, there are many illusions. At first, the road between the entrance and the Cinderella Castle. As same as Teatro Olimpico, it gets more and more narrow as it gets closer to the caste. So we feel that the castle is far away than real.

 In fact, the castle itself has illusion. The castle is looked taller than real because of the difference of the size of stone. Stone that places high point is small, and one that places low point is big.
 This technique is applied to Japanese castle and Japanese old building like Gozyunoto. In Japanese castle, the building gets more and more small as the building gets high. Because of it we feel that the castle is taller and more solemnity. Gozyunoto also has this structure. The highest floor is much smaller than lowest floor. Moreover the stability is one of the reasons that Japanese castle and Gozunoto has this structure.

 Do you know "Ryoanzi" also has illusion? Ryoanzi has devices to show it more broad.The illusion is hidden in a wall. The wall has little inclination. In left picture, the left side wall gets more and more low toward right. On the contrary, the right side wall gets more and more low toward left. In short, the back side wall is lower than other. Because of this device, it is said that we feel Ryoanzi is twice as broad as real size.
 Thus, illusion for buildings are used in around the world for long time.

 How about illusion that is put to practical use? I was surprised to know new aspect of illusion. 

Through these ten article, I can research about trick art to my hearts content. And I knew that trick art is not just a entertainment but plays various roles.

Trick picture that can be made easily from our daily life

 Have you ever seen a spirit photograph? I have never seen it.

 In the first place, I think that there are no real spirit photographs. If one takes it, it is just a sham. No. It is trick art! If a photograph could trick someone, it can be said trick art.
 Well, I introduce trick pictures that can be made easily from our daily life.

 Spirit picture also can be made from accidental element. There is many pictures that have another person's face, people who have no legs and so on. But these phenomena are caused by reflected light of window, dust in the air and "pattern recognition". Pattern recognition is instinct of human. We think three dots is eyes and mouse. This is one of pattern recognition.

 Look at above picture. You will think the girl's arm is very bushy! But it is wrong. If you look it carefully, you will notice the bushy arm is a man's leg. Spirit photograph is just like this.

This is similar type of trick picture to above picture. Don't be surprised. The center woman is not naked. The cause of this trick is a woman'a fat arm.

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 The pictures of UFO or Nessie are also trick picture. The left picture is famous picture of Nessie. There are many element that Nessie never exist. So we know this is not Nessie.











If someone take a picture of below situation, it is seen Nessie. Trick picture is so easy to take.

Next, look at this picture.

 Can you see a flying object at the upper right of this picture? Is it an UFO?

In fact, I took this picture from my room. So the UFO is just ink of a marker painted on sellotape. As another way to take UFO, taking flying disc that is like UFO. And painting UFO on a picture and take it again is common. Like this picture, you can take trick picture easily, too!

 Trick picture can be classified in few types by the situation that the picture taken.

 At first, trick pictures that use rules of perspective are common. To use rules of perspective, you can make trick about size.

If you want to try this type of trick picture, I recommend you to use a wide-angle lens. Because it can focus wide area and emphasis perspective.

　Second type is using gravitation illusion. It sounds difficult. But if there is a wall or a chair and an idea, it can be taken soon.

Third type is fusion with another thing. 

Of course, above picture is taken intentionally. But below picture is taken by chance. Thus, trick picture is hidden in our daily life.

 There are more and more types of trick pictures. So try to take your original interesting pictures.

 How about trick pictures that can be made easily from our daily life? If you make trick picture yourself, you will know more fascinating point of trick art.

Next week, I will show you practical use of trick art.

Type6: illusion about color

 Have you ever seen illusion about color?

 You will think what it means. Illusion about color, that is to say, illusion that trick human by using human's recognition about color. In this topic, you will become aware of your eyes' ambiguity. But believe yourself!

 

 Look at this picture. I will say an astonishing fact. A and B is same color! I have never believe it. But it is fact. It is illusion. We are neatly taken in. If you can't believe (I think you can't believe), look at below picture. Still, if there is someone who can't believe, use the PaintSoft to examine the fact by yourself.

 Next picture must surprise you, too.

 

 You will think there are many lozenges that are four different colors. But it is wrong. These lozenge are all same!! In fact, one lozenge have gradation of color in it. The gradation makes this illusion. You must also doubt it. But below moving image make you feel clear. This causes by the contrast of lozenge's edge. In every boundary, above parts are darker than below parts, so eyes are tricked.

 Please obey the words written in the picture. Can you see the building that is colorful? But the building is actually black and white image.
 This illusion occur because of the cone cell. If you stare at same color long time and cone cell
accustomed the color, cone cell send signal of opponent color to the brain. Opponent color means, for example, red-green and yellow-blue. This theory is proposed by Hering. Ewald Hering was a German physiologist who did much research into color vision and spatial perception. He proposed opponent color in 1892. This is hard to explain, so if you want to know detail, please check this URL. http://www.brl.ntt.co.jp/IllusionForum/v/colorAfterimage/ja/index.html
 There are many pictures about illusion. So I introduce some of them. Please enjoy!

The knack to see colorful picture is staring only one point and being careful not to move your eyes.

Next one is Munker illusion. Do you think there are four colors in yellow and blue stripe? In fact, there is only two colors. Above two rectangles are both red, and below two rectangles are both green. But you will feel right two rectangles are lighter than left. This illusion caused by phenomenon of assimilation. It means that the surrounding color influences the surrounded color. In above picture, right side rectangle' edge are surrounded by yellow more than blue. So right side are seen light. On the other hand, left side rectangle' edge are surrounded by blue more than yellow. So left side are seen dark.



Last picture is little difficult to understand. But if you understand it, you will be impressed.

 Now, you will think that there is blinking pink balls. It is right. Don't worry. But you can try another viewpoint!
 At first, be close to the picture and gaze on the center cross mark few minutes. So you will see a green ball revolving around the mark. And try to keep gazing more. Finally, you will notice that there is only green ball revolving. Can you see it?




How about illusion about color? Our brain has evolve to live. The transmission between brain and the optic nerve. But if we use the mechanism, our brain can be tricked easily. I think it is very interesting.

Next week is trick picture that can be made easily from our daily life. Don't miss it!