
[測][數] 透視投影;中心投影法
The paper presents the methods of developing the multimedia courseware on architecture perspective projection.
本文介紹了多媒體課件《建築透視投影》的開發方法。
In this paper the focus is introduced as a parameter to resolve this problem that is the recovery from an image that is a perspective projection of a cylinder.
本文通過引入焦距這個參量,很好的解決了在未知圓柱體端面輪廓的情況下,對透視投影圓柱體圖像進行恢複的問題。
Creates a perspective projection matrix.
創建一個透視投影矩陣。
Research on dam perspective projection and its visualization drawing attaches importance to the hydraulic digitalization and modernizes the design of hydraulic projects.
堤壩透視投影及圖形可視化研究是數字水利,實現水利工程設計現代化的重要課題。
The aliasing artifacts that ray sampling may yield in perspective projection is discussed, too.
另外,對透視投影中光線采樣對走樣的影響也進行了讨論。
The equation can be used in all cases of perspective projection.
該方程適用于透視投影的一切情況。
This paper stu***s the fundamental problem of perspective projection (central projection) and gives a corresponding equation. The equation can be used in all cases of perspective projection.
對透視投影(中心投影)的基本問題進行了研究,并給出了相應方程;該方程適用于透視投影的一切情況。
This paper puts forward a method of texture rectification based on perspective projection.
論述了一種基于透視投影的紋理校正方法。
Based on the screen coordinate theory of solid diagram of complementary color, a perspective projection diagram of space surface is drawn using floating horizontal line method.
利用求補色立體圖屏幕坐标原理,采用浮動水平線法來繪出空間曲面的透視投影圖形。
One method which make use of cross-rate invariant of perspective projection to render novel image is proposed.
提出了一種利用透視投影中的交比不變量來生成新圖象方法。
Perspective projection works like the real world: when you look down a long, straight road, it seems that the road's boundaries meet at a point at the horizon.
透視投影與真實世界中的情況比較類似:當您俯視一條又長又直的道路時,道路兩邊看上去似乎在地平線處交彙了。
Spherical projection is a ****** and effective method to transform a fisheye image to a perspective projection image.
把魚眼圖象變換成透視投影圖象,球面投影是一種簡單有效的方法。
The ******st form of projection is a perspective projection.
最簡單的投影形式是透視投影。
This paper stu***s the transformation matrixes for perspective projection and axonometric projection, deduces the general matrix for three dimensional graphic transformation.
對軸測投影和透視投影變換矩陣進行了研究,推出了三維圖形變換的統一矩陣。
This paper presents a new method for constructing the height of perspective view according to the theory of perspective projection and the principle of central projection.
本文根據透視對應理論和透視投影的基本原理,在透視鳥瞰圖中論證出了求作形體透視高度的新方法。
A vision measurement method of lateral deviation error under the condition of near view is presented according to camera's perspective projection relationship.
根據攝像機的成像幾何關系,提出了一種針對近視野情況的自主車輛橫向偏差的視覺測量方法。
The paper presents a novel approach to compute interior and exterior parameters and calibrate camera based on geometry property of vanishing points in perspective projection theory.
根據透視投影理論中滅點的幾何性質,計算出相機的内、外參數,以此實現相機标定。
The perspective projection model of the theodolite is analyzed and the mathematical model of the three-dimensional coordinates measuring system with bino-theodolites(TCMSBT) is analyzed.
分析了經緯儀透視投影模型以及雙經緯儀三維坐标測量模型。
In this paper, we present a new algorithm to obtain aspect graphs of complex objects under view oriented perspective projection model.
本文提出了基于視點固定的透視投影模型下,形态圖的求解新方法。
This thesis reports a new approach to panorama construction, using NURBS' surface segmentation to present spherical surface which combined perspective projection, and the novel contributions are made.
該研究提供了一種可行的、開發容易的、制作成本低廉的制作球面全景圖像的有效方法。
First, navigation measurement equations and measurement sensitive matrices are provided based on the colinear equation of perspective projection.
首先,基于透視投影模型的共線方程,給出了導航測量方程和測量敏感矩陣;
In terms of perspective projection transformation, a novel mathematical model is proposed for a non contacting optical flexible 3D measurement system constructed by the two theodolites.
文中以透視投影變換為依據,為基于兩台經緯儀形成的一種非接觸式光學柔性三坐标測量系統提出了一全新的數學模型。
After reviewing the parallel-perspective projection, the improved stereo mosaicing algorithm is proposed to get the stereo pair preserved 3D information.
在簡單回顧了平行-透視投影之後,提出了改進的圖像立體鑲嵌算法,用來獲取地面三維信息立體像對。
In terms of perspective projection transformation this paper study the technology of spatial 3-D coordinate. New camera calibration technique is proposed.
以透視投影變換為依據,研究了空間三維測量技術,提出了一種新的标定方法。
According to the camera perspective projection model, it carries on the linear calibration to the camera, and uses the nonlinear to revise, then obtains the parameters of camera.
根據攝像機透視投影模型,對攝相機進行線性标定,再進行非線性修正,得出攝像機各參數。
|perspective shadow;[測][數]透視投影;中心投影法
視角投影(Perspective Projection)的詳細解釋
一、基本定義 視角投影是一種在二維平面上模拟人眼觀察三維空間物體時産生的視覺效果的技術。其核心在于模仿光線從物體表面反射後通過一個“視點”(類似于人眼瞳孔)投射到成像平面(類似于視網膜)的過程。這種投影會導緻物體隨着與視點距離的增加而呈現“近大遠小”的視覺收縮現象,并産生“消失點”(所有平行線在遠處彙聚的點),從而在二維平面上營造出深度感和空間立體感。它是計算機圖形學、攝影、建築制圖等領域中實現真實感三維渲染的核心技術。
二、核心原理與數學表達
三、關鍵特征
四、應用領域
權威參考來源:
Perspective projection(透視投影)是計算機圖形學中用于将三維物體轉換為二維圖像的核心技術,其特點是模拟人眼的視覺規律,使遠處的物體比近處的物體更小,從而呈現立體感和空間深度。
基本原理
通過将三維坐标系中的點沿着視線方向投影到虛拟的二維平面上,投影後的位置會根據物體到觀察點(如相機)的距離(通常由z軸坐标決定)動态縮放。例如,一個立方體的遠頂點在投影後坐标會被壓縮,形成「近大遠小」的效果。
數學表達
使用齊次坐标和投影矩陣實現變換。标準透視投影矩陣公式如下:
$$
begin{bmatrix}
frac{2n}{r-l} & 0 & frac{r+l}{r-l} & 0
0 & frac{2n}{t-b} & frac{t+b}{t-b} & 0
0 & 0 & -frac{f+n}{f-n} & -frac{2fn}{f-n}
0 & 0 & -1 & 0
end{bmatrix}
$$
其中,(n)和(f)為近/遠裁剪面距離,(l, r, t, b)為投影平面左右上下的邊界。投影後坐标需通過透視除法(除以w分量)得到标準化設備坐标(NDC)。
與正交投影的區别
若需更深入的技術實現細節(如具體API調用),建議參考計算機圖形學教材或OpenGL/DirectX文檔。
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