Traditional Culture Encyclopedia - Photography major - How to see a three-dimensional picture?
How to see a three-dimensional picture?
What do you think?
Stereo painting is a painting made by using the stereoscopic vision phenomenon of human eyes. Ordinary paintings and photographic works, including computer-generated three-dimensional animation, only use the light and shadow of human eyes, light and shade, sense of reality and falsehood to obtain three-dimensional sense, but do not use the stereoscopic vision of eyes. One eye and two eyes are the same. Make full use of binocular stereo vision, and you will see a wonderful world.
First, the principle of stereoscopic vision and stereoscopic painting
People have two eyes, and there is a certain distance between them, which causes some differences in the images of objects in the eyes, as shown in the right picture. As can be seen from the picture, because the distance between the object and the eye is different, the visual angles of the two eyes will be different, and the images seen will be different because of the different visual angles, and the brain will feel a three-dimensional scene according to this difference.
Cubic painting uses this principle to produce a series of repeated patterns in the horizontal direction. When these patterns overlap in two eyes, you will see a three-dimensional image. See the picture below, this is a three-dimensional painting that can't be simpler. In the picture, the top circle is farthest and the bottom circle is closest. Please note that the distance between the circles in the top row is the largest and the distance between the circles in the bottom row is the smallest.
How did this happen? Let's look at the picture below. As can be seen from the figure, the distance of the repeated pattern determines the distance of the stereoscopic image. Based on this principle, the program for generating stereoscopic pictures generates repeated patterns with different distances according to the distance of stereoscopic images.
Second, the appreciation of stereoscopic painting.
If you can't understand stereoscopic painting now, are you already in a hurry? Let me introduce how to read the three-dimensional painting.
There are two forms of stereoscopic painting: the first is the same pattern arranged at different intervals in the horizontal direction, which looks like objects with different distances. Please look at the picture below.
Another kind of stereoscopic painting is more complicated. In this kind of three-dimensional painting, you can't directly see the image of the object, and there are only messy patterns on the screen. These two works share the same point of view. The principle is to let the left eye see the image of the left eye and let the right eye see the image of the right eye. Specific methods: when looking at the stereoscopic painting, imagine yourself enjoying the artwork in the glass window, that is, don't look at the stereoscopic painting on the screen, but treat the screen as the glass in the glass window.
Three, two-point practice method
Please aim at the two points at the top of the picture below, let your eyes rest for a while, then aim at these two points with a slightly blurred line of sight as if looking far away, and you will see that the other two points are separated, then adjust your line of sight and try to combine the two points inside into one point. When four points become three points, you will see a three-dimensional image.
Fourth, another way of watching.
If the computer is ugly, you can do this. If there are two points marked on the screen (if not, you can observe carefully, and there are the same patterns in the horizontal direction, such as two points with the same color and size), then you can use two dark lines to stick them vertically on the display screen (you can enter the screen a little), so that the two lines are vertical and connected to the two points respectively. Then, put a small object above the back of the display as a reference object, look at the reference object along the upper edge of the display, and move the focus of the eyes back and forth so that the left eye, the left line and the reference object are in a straight line, and the right eye, the right line and the reference object are in a straight line, which can block one eye for adjustment. Then look at the reference object with both eyes, and the two lines will become three, so that the eyes can see the stereoscopic effect by climbing into the stereoscopic picture along the midline.
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