perspective | 易学教程

What is the value of BPM? (Business Process management) Is it worth using? In which cases? [closed]

阅读更多关于 What is the value of BPM? (Business Process management) Is it worth using? In which cases? [closed]

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 7 years ago . And I'm not meaning Bits Per Minute, but Business Process Management. At first though BPM was overestimated, because the technology is

Perspective Transform + Crop in iOS with OpenCV

阅读更多关于 Perspective Transform + Crop in iOS with OpenCV

问题 I'm trying to implement a cropping & perspective correction feature into an upcoming app. Whilst doing research, I came across: Executing cv::warpPerspective for a fake deskewing on a set of cv::Point http://sudokugrab.blogspot.ch/2009/07/how-does-it-all-work.html So I decided to try implementing this feature with OpenCV - the framework is there so the installation was fast. However, I'm not getting the results I hoped for: (2nd picture is the result) I've translated all the code to work with

Move camera to fit 3D scene

阅读更多关于 Move camera to fit 3D scene

I'm looking for an algorithm to fit a bounding box inside a viewport (in my case a DirectX scene). I know about algorithms for centering a bounding sphere in a orthographic camera but would need the same for a bounding box and a perspective camera. I can not just change the FOV because this app has FOV as a user editable variable, so it must move the camera. I have most of the data: I have the up-vector for the camera I have the center point of the bounding box I have the look-at vector (direction and distance) from the camera point to the box center I have projected the points on a plane

Skewing an image using Perspective Transforms

阅读更多关于 Skewing an image using Perspective Transforms

问题 I'm trying to perform a skew on an image, like one shown here (source: microsoft.com) . I have an array of pixels representing my image and am unsure of what to do with them. 回答1: A much better way to do this is by inverse mapping. Essentially, you want to "warp" the image, right? Which means every pixel in the source image goes to a predefined point - the predefinition is a transformation matrix which tells you how to rotate, scale, translate, shear, etc. the image which is essentially

How do I reset perspective for Eclipse e4 RCP application?

阅读更多关于 How do I reset perspective for Eclipse e4 RCP application?

问题 After building a perspective in application.e4xmi file, I am unable to reset perspective by calling IWorkbenchPage.resetPerspective(). 回答1: I thought this may save others some time, as well as document it for myself. The trick to being able to reset an e4 perspective is as follows (assumes a basic application.e4xmi with PerspectiveStack element): In your application.e4xmi file, locate your PerspectiveStack under your Application/TrimmedWindow node. Record/set its ID. In Eclipse 4 Model Editor

Perspective transform of SVG paths (four corner distort)

阅读更多关于 Perspective transform of SVG paths (four corner distort)

问题 How is it possible to distort paths in SVG in browser so that they are distorted to certain perspective using possibly javascript or css? The perspective distort can be made easily in Photoshop, Illustrator etc, but how about browsers? This is source path: And this is the path after transformation: 回答1: This is my drag distort proposal (share you knowledge, Q&A-style). Live example is in http://jsfiddle.net/xjHUk/278/ and the main code is this: (only output window: http://jsfiddle.net/xjHUk

Calculating rectangle 3D coordinate with coordinate its shadow?

阅读更多关于 Calculating rectangle 3D coordinate with coordinate its shadow?

问题 Sometimes was a problem what is the rectangle 3D rotated and be perspective transition (for example in CSS) draw as the tetragon. But we want obtain the rectangle (width, length, Euler angle, perspective) transformed via rotate and perspective draw as the tetragon. 回答1: figure fig.1 points a,c diagonal rectangle(yellow) points A,C diagonal tetragon(shadow) (red) fig.2 a,b,c,d rectangle points(yellow) A,B,C,D shadow(tetragon) (red) 回答2: Solve: Coordinate system: The origin of the coordinate

Transformation of 3D objects related to vanishing points and horizon line

阅读更多关于 Transformation of 3D objects related to vanishing points and horizon line

问题 I\'m trying to computing the exact prospective transformation of a 3D object starting from a vanishing points and horizon line of a picture. What I want is, fixed the vanishing points and horizontal line of a picture, I want rotate and skew an 3D object according with vanishing points and horizontal lines that I set starting from the picture Below the final result that I expected. How can I obtain this result? What kind of transformation can I use? In this video is possibile to see the result