pentaho transformation

Computer vision is to make the computer understand the image and video, the purpose of this series of blog is to deepen their learning computer vision in the process of understanding and review of relevant knowledge. Many of the contents refer to: Textbook "Computer vision:algorithms and Applications", textbook "Learning Image Processing with OpenCV" reference book "Learning OpenCV" , the curriculum of foreign universities, "computer vision" and the course "Computer vision". The difference betw

This paper mainly analyzes the coordinate transformation formula from local coordinate system to global coordinate system. The global coordinate system is described first, as shown in Figure 1,o-xyz, the global coordinate system, O-x ' Y ' z ' is the local coordinate system defined in the o-xyz coordinate system, and the relationship between the two coordinate systems is as follows: the z ' axis of this o-x ' Y ' z ' will go through the coordinate ori

Summary: The transformation of the three-dimensional coordinate system is essentially the change of the origin and the orthogonal base vector, which is represented as translation and rotation in space. The transformation of the coordinate system as shown in the figure can be represented by a transformation matrix. Although the principle is relatively simple, bu

Stretching, shrinkage, distortion, and rotation are geometric transformations of images. These transformations are widely applied in 3D vision technology, and include affine transformation and perspective transformation. Generally, a single-application modeling method is used for affine transformation. cvwarpaffine is used for dense ing, and cvtransform is used f

As shown in the figure below, the unit square in the XY plane is projected onto any plane p and becomes an irregular quadrilateral abcd, and we can calculate the coordinates (x ', y ') after the projection of any point on the plane xy to the plane p by the coordinates before and after the four vertices of the square. We notice that the four sides of the square are projected to the plane P, respectively, to the line Ab,bc,cd,da, that is, the projection is located in a straight line point, the pr

The transformation of the coordinate space and the world to page spaces The coordinate space is a plane, in which the graph is positioned in the plane rectangular coordinates. The application uses coordinate space to scale, translate, cut, and mirror the output of the graphic. The following coordinate spaces are involved in Windows GDI 世界坐标空间（world space） 页面坐标空间（page space） 设备坐标空间（device space） 物理坐标空间（physical device space）

Bytes. Understanding the content of coordinate transformation, even if it truly enters the wonderful 3D world. 　　1. display of 3D objects in OpenGL (1) Coordinate System In the real world, all objects have three-dimensional characteristics, but the computer itself can only process numbers and display two-dimensional images. The only link connecting three-dimensional objects and two-dimensional data is coordinates. To digitize the displayed 3D object,

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

coordinate transformation is the basis of a deep understanding of the three-dimensional world, very important. The first part of this study is to understand several concepts: viewpoint Transformation, model transformation, projection transformation, viewport transformation.

Http://blog168.chinaunix.net/space.php? Uid = 20221192 Do = Blog id = 278899 Some netizens wrote to me hoping to understand the specific derivation process from the world space to the camera space transformation matrix in the fixed assembly line. In fact, I have explained how to use the camera transform as an example of using the basic theory in vector ry 6, but it may not be specific enough. In this article, I will try my best to explain the entir

The previous article reviewed the concepts of space, ing, and transformation. Next, we will introduce the affine, bilinear, and perspective commonly used in image processing. As discussed below Two-dimensional. Affine (Affine)An affine transformation is a linear transformation. After the transformation, the image will

Reading Tips: The C ++ image processing series focuses on code clarity and readability, all using C ++ code. 《Delphi Image ProcessingThe series focuses on efficiency. The general code is Pascal, and the core code is BaSm. Make sure that the two items are consistent and can be compared with each other. The code in this article must include "C ++ Image Processing-data types and common functions"The header file of BMP data. h and transformmatrix. h file of "C ++ Image Processing-Plane Geometric

Article 27: Minimize transformation actions One of the design goals of C ++ rules is to ensure that "type errors" are impossible. Unfortunately, the transformation (casts) destroys the type system. That could be This may cause any type of trouble, some of which are easy to identify and some are very obscure. The C-style transformation action looks like th

Transformation is based on inheritance, which is a mechanism of code reuse in object-oriented languages, through inheritance, subclasses can reuse the function of the parent class, and if the parent class does not meet the requirements of the current subclass, the subclass can override the methods in the parent class to extend it.Transition up: The object that the subclass refers to is converted to a parent class type called upward

Python image grayscale transformation and image array manipulationMingchaosun font: [Increase decrease] Type: Reprint time: 2016-01-27 I want to commentThis article mainly describes the Python image grayscale transformation and image array operation related data, the need for friends can refer to the followingUse Python and NumPy to perform a series of basic image processing by manipulating the image array

Hough Transformation Detection Linehttp://keith70.u.sourceforge.net/?p=200 1.1 Hough Transform In the computer recognition, it is often necessary to look for a specific shape from the image, if the direct use of image lattice to search and judge is obviously difficult to achieve, then it is necessary to image pixels according to a certain algorithm map to the parameter space. The Hough Transform provides a method for mapping image pixel informatio

The geometric transformation of an image is the spatial geometric transformation of the image pixels without changing the image content. It mainly includes the translation transformation, image transformation, scaling and rotation of the image. This article first introduces some basic concepts of image geometric

Have not quite understood this concept, so searched the internet a bit article reprinted from: http://www.cnblogs.com/fickleness/p/3149011.htmlTransformation is based on inheritance, which is a mechanism of code reuse in object-oriented languages, through inheritance, subclasses can reuse the function of the parent class, and if the parent class does not meet the requirements of the current subclass, the subclass can override the methods in the parent class to extend it.Transition up: The object

Linear transformation Affine Transformation: includes translation, rotation, and proportional transformation. This transformation can maintain the parallelism of Linear building and is reversible. Projection Transformation: includes perspective

The principle of transform is 2D matrix transformation in computer graphics, Before starting, let's first review the next simple linear algebra knowledge: matrix and vector multiplication. If it is too complex to be used, only the product of the 3-dimensional vector and the 3x3 matrix is required: Next, let's talk about the relationship between transform and matrix multiplication. After rendering any HTML element, we can get a bitmap and perform a ma