the focal length to 2CM, and set the aperture to the minimum, to ensure maximum depth of field. It is very difficult to clear the flowers. First, it is difficult to grasp the manual focus distance. The focus on the LCD display is clear, but it may not be clear. Second, such small flowers are generally relatively low and it is not easy to use a tripod. Third, when the shutter is pressed, there cannot be any breeze. There is no better way, only repeate
direction parallel to the edge of the screen. The coordinate origin is taken in the lower left corner, and the length unit is usually taken as a pixel.
(2) camera simulation of 3D objects
To illustrate the transformation between a 3D object and a two-dimensional image, we introduced a Camera (Camera) simulation method, assuming that a Camera is used to take a picture of the world, in the camera's viewfinder, there is a transformation process between the human eye and the real world.
Figure 1. T
is used, the shutter speed should be higher than 1/60 seconds. If the field illumination is insufficient, you can use a flashlight, a tripod, or let the camera solve the problem with some fixed objects.
Refer to the gray card rule. In the shooting process, the use of 18% Gray card light measurement is the best way to get a uniform and accurate photo exposure, even if you forget to bring a gray card does not matter, you can extend your hand, let it fa
let it go to bed elsewhere. And send your "pancake" to your optical bag.9. Use a Computer HostIf you want to kill your desktop computer, it will be faster if you drive it for a cross-country ride or carry it on your own to climb a mountain or Bundy. Your method is too small to shake, it takes a long time to score. If you are willing to stick to it, it is estimated that the first result will be a hard disk, and the cause of death is a bad hard disk.Solution: use the photo of your
sight, so I first turned my attention to Ji Guo, a neighboring country in the east of Qi. Although Ji Guo was small, it made an extremely serious mistake and had a deep hatred against Qi.
It turns out that after the establishment of Zhou Dynasty for more than one hundred years, an early Chinese monarch in this small country ran to Zhou YiWang to say bad things about Qi weigong Jiang. At that time, the Zhou Dynasty was still in the Western Zhou era, with its own strength, the Zhou royal family c
indicates transparency. 0 indicates transparency, and 1 indicates opacity.
Glmatrixmode (gl_projection );Glortho (-5, 5,-5, 5, 5, 15 );Glmatrixmode (gl_modelview );Glulookat (0, 0, 10, 0, 0, 0, 0, 1, 0 );These functions involve matrix, 3D to 2D transformation knowledge. First, let's introduce the background knowledge and then look at the usage of these functions.
In the real world, all objects are 3D. However, these 3D objects must be displayed in the form of 2D flat objects in the computer wor
question so that we can find the answer as much as possible
The indoor light is dark, the shutter speed is low, and the jitter causes blur. One method is to use a flashlight, and the other is to use a tripod. 2. Reduce the aperture and increase the depth of field. 3. The difference is clear, not dynamic, fuzzy, and dynamic.Summary of high school mathematics knowledge points
Summary of high school mathematics knowledge points1. For a set, it is necess
, there will always be 36,000 million people. Even though we are ignorant, we will establish a holy land, so do we know what we do for daily use?
Yuan Jing also lost, yuan qi also exhausted, Yuan Shen also left.
It is a 30 thousand moment, engraved to reconcile, if there is a moment of poor violation, the medicinal material consumption, fire shortage, so said no difference for Dan also.
It is suitable for use, do not work, really cool condensation, the vast majority of God.
The last day of the y
main familiar.Some people ask, I read after reading, I can't remember, feel no use, how to do?because you have seen too few times. Each classic is the leader of the corresponding field of the tripod, how can you see it can learn all the knowledge inside, to understand all the theory inside. A good book, like an inexhaustible treasure, every re-read there will be no previous harvest, it is worth our time and again to explore.2014 is about to pass, and
After a week or so, I don't want to go to work anymore. I'm sorry, but I have to go to the company tomorrow. There are still many meetings andCodeWaiting for me.
I had to pull myself out of my senses and memories as soon as possible, and screw up the working spring ......
This holiday was spent in the Maldives. It is said that it is the most beautiful island in the world:
The purest beach:
The most clear sea water:
The most leisurely fish:
The most greedy big bag:
The most inter
coordinate system, on the graphic display screen. The coordinates of this coordinate axis are usually taken parallel to the edge of the screen, the coordinate origin is taken in the lower left corner, and the unit of length is often taken as a pixel.(ii) Camera simulation of three-dimensional objectsTo illustrate what transformations need to be made between three-dimensional objects and two-dimensional images, we have introduced a camera simulation that assumes a camera to capture the world, an
he was not able to continue to ask questions. He could only point to his own mountain and said to the old man: "I came from that mountain."I don't know where everything is now, so I switched the concept. The old man asked his house where he was. Jin Ding Wang electric car, but he told others that he came down from the mountains.He did not care. He looked at Liu Feng's finger and moaned, "Oh, it's from shuangcross Ridge ."When I heard my name go down to the mountains, Liu Feng felt that the name
OpenGL before you draw a scene, you need to create or define a scene, the process that produces the target scene view is similar to the process of photographing a camera.1. Secure the camera to the tripod and align it to the scene (view transform).2. Arrange the scene so that the position of each object in the photo is what we want (model change).3. Select the camera lens and adjust the magnification (projection transform).4. Determine the size of the
shows the simulation by which several coarsely sampled low resolution images (a) are processed to a high resolution image (B ). the human brain has a similar processing capability. for more details refer to ShinAoki, "super resolution image processing from multiple digital images", image sensing Symposium, 1999, Yokohama.
Fig.1-(a) coarsely sampled low resolution image
Fig.1-(B) processed high resolution image using multiple randomly Phase Shifted Images
On the human retina, only a smal
composed of row vectors. In this example, we can clearly see that,MIt indicates that the part is rotated 26 degrees counter-clockwise.
Of course, all vectors are affected by linear transformation, not just base vectors. The most intuitive impression of transformation can be obtained from the "L" shape, the Complete 2D parallelogram composed of the base vector helps to further see the impact of the transformation on other vectors, as shown in Figure 7.2:
The parallelogram is called a deflection
image, we introduced a camera (CAMERA) simulation method, assuming that a camera is used to take a picture of the world, in the camera's viewfinder, there is a transformation process between the human eye and the real world.
Figure 1. The camera simulates various coordinate transformations in OpenGL
From a 3D object to a two-dimensional image, just like taking a photo with a camera, the following steps are usually taken:
1. Place the camera on a
need to be considered during the purchase, even if it is 1/2. 5 or above.
You can select a digital camera to purchase more suitable ones2. When the CCD size is the same, you should select a camera with a low pixel. The smaller the pixel size, the larger the photosensitive area of each pixel, and the better the performance. (Editor's note: choosing a digital camera doesn't mean that the higher the pixel, the better, the higher the pixel, and the higher the size of the photosensitive element. O
The transformation between viewing and modeling is closely related to the camera to place the tripod and adjust the position and angle of the object to be photographed. Usually, these two transformations are defined using a modelview transformation matrix. For the same coordinate transformation, you can use different methods to imagine this transformation. For example, if you want to translate a distance from the camera to a certain direction, the eff
a period of time but have not been "done", we recommend that you use them for 36-48 hours on the basis of the original speaker, which should be able to achieve better results. Of course, there must be a degree to do everything. I don't think it should take more than 72 hours to "boil" the speaker. Otherwise, even if there is no problem with the speaker, I am afraid you will also need to become a machine.
3. Placement
The placement here does not mean how to place the speaker, but rather it re
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