The second chapter describes how to implement the calibration-based Augmented reality on the iOS platform, including the following four aspects:
1. Build opencv project on iOS platform
2. Marker Detection and Recognition
3. Camera Calibration and marker pose estimation
4. rendering a 3D virtual object based on marker
The first part is the development of the iOS platform. I am not too concerned about it. The
;
......
Load the cascading classifier and determine if the load is successful and print the prompt if it is unsuccessful
if (!face_cascade.load (Face_cascade_name)) {
printf ("[ERROR] cannot load a cascading classifier file!") \ n ");
return-1;
}
......
Recognition and detection of picture frame
Face_cascade.detectmultiscale (Frame_gray, Faces, 1.1, 2, 0| Cv_haar_scale_image, Size (30, 30));
Convert to grays
Adjust the object recognition parameters of the AdaBoost Cascade classifier based on the Haar feature 1. Object recognition problem of AdaBoost Cascade classifier based on Haar featurePaul A. Viola and Michael J. Jones published in 2001 the article "Fast object detection using simple features to improve cascade detectors." At the same time, many bloggers in csdn from 07 to 13 have made a lot of work on the
MSR Image Recognition Challenge (IRC)
Microsoft happy to continue hosting this series of Image recognition (retrieval) Grand challenges. What is the it takes to build of the best image recognition system? Enter These MSR
need to train with more data.
We need to set the SVM parameters that define the basic parameters to use in an SVM algorithm; we will use the cvsvmparams structure to define it. It is a mapping done to the training dataTo improve its resesponance to a linearly separable set of data. this mapping consists of increasing the dimensionality of the data and is done efficiently using a kernel function. we choose here the cvsvm: Linear types which means that no mapping is done.We then create and train
Image Recognition: Hop robot and Image Recognition RobotPreparation
IDE:VisualStudio Language:VB.NET/C# GitHub:AutoJump.NET
This article will introduce you to a method for achieving a "Hop" robot through image recognition.Section 1 I
A recent project used image recognition, has never touched OpenCV, after a variety of tutorials, and finally understand some.
The whole process is probably getting the image--image binary, grayscale (cvtcolor)--Image noise Reducti
Because the iOS version of demo provided by TensorFlow is not as high as the Android version, it has developed an iOS program for image recognition through the recognition service.The program is based on the image recognition Service (http://www.cnblogs.com/conorpai/p/687365
Handwritten Digit Recognition [QT + OpenCV], handwritten digit qtopencv
[Description]
There are many ways to implement Handwritten Digit Recognition.
This article tries to simplify it so that you can quickly understand how to implement a dynamic system.
【]
[Idea]
1. Feature Extraction
Divide the image into 5x5 areas
Image Recognition is to properly process an image and then identify the target object. This technology mainly involves two aspects: digital signal processing and pattern recognition. Digital signal processing is the premise and foundation of pattern recognition, and pattern
system becomes higher.4.2 uses the nearest neighbor. That is, the selection of the smallest European distance image as the result of the current test image.In the actual system, it is often necessary to use K nearest neighbor, that is, choose the smallest k Euclidean distance, determine which class they belong to and determine the current numerical results.For reasons of simplification, the correct rate of digital
[OpenCV] expands the image boundary and opencv expands the image boundary.
In image processing, some attribute values at the current pixel position are often calculated using the adjacent pixels of the current pixel. This will lead to cross-border access to the border pixel.
Original address: http://blog.csdn.net/u013088062/article/details/50435079OpenCV is an important tool for C + + image processing, and the gender-aware project of this face is developed with the help of OpenCV. Although there are a lot of OPENCV on the Internet configuration tutorial, but for the sake of tutorial integrity, here is a special blog to introduce the
OpenCV Handwriting Selection quiz (b) Character recognitionThe choice question basically only need to recognize ABCD and empty five content, theoretically should recognize the rate is higher, the identification code refers to the online search code, because the reference URL is more, now also can not clear is the reference where the code, here does not thank each.Basic steps:First, the recognition function
Recently in the construction of point cloud system, the main combination of Point Cloud Library PCL, Visual library VTK and image processing open Source Library OpenCV to combine image and point cloud data collaboration of rock mass analysis system. Here I would like to share with you the overall construction process, the shortage of places I hope you can help to
[Opencv] pixel-operated digital image processing and opencv Digital Image Processing
A few days ago, the matlab was used to process digital images and matrix operations. If you forget linear algebra, it would actually be GG.
After using matlab, I decided to use opencv. C ++
for these people, but you are still in the initial stage of machine learning and pattern recognition.) in practical application, the number of training samples cannot be infinite, however, in any case, three or five thousand positive samples and three or five thousand negative samples are not difficult? (If you cannot even do this, we recommend that you do not engage in machine learning, pattern recognition
Circulated on the Internet
Void showimageauto (iplimage * pimg, cwnd * WND );Void showimage (iplimage * pimg, cwnd * WND, bitmapinfo * BMI );Void fillbitmapinfo (bitmapinfo * BMI, int width, int height, int bpp );
You can use iplimage to draw an image on the MFC interface. However, the function has bugs and does not support single-channel, 8-bit grayscale display.The main reason is that the color palette is used for 8 bitmap. In the bitmapinfo structu
OpenCV image matching algorithm-sift, opencv image sift
//utils.h#ifndef _UTILS_H#define _UTILS_H#include
//utils.cpp#include "stdafx.h"#include "utils.h"#include
// Sift. cpp # include "stdafx. h "# include
Use
INFO sift_info;sift(path1,path2,sift_info,true);showInfo(sift_info);
This is a Raspberry Pi run, opencv3.OPENCV provides a handwritten digital picture to us, as shown, as a sample library for identifying handwritten numbers.0 to 9 A total of 10 numbers, each number has five lines, a row of 100 digits. First of all, we need to intercept these 5,000 numbers.The picture size is 1000*2000, and each number block size is 20*20.1. Intercept samples and storeThe following code is the process of intercepting the above numbers a
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