This OpenCV tutorial is a very simple code example of GPU Cuda optical flow in OpenCV written in c++. The configuration of the project, code, and explanation are included for farneback Optical Flow method. Farneback algorithm is a dense method that is used to process all the pixels in the given image. The dense methods are slower but more accurate as all the pixels of the image are processed. In the following example, I am displaying just a few pixes based on a grid. I am not displaying all the pixes. In the opposite to dense method the sparse method like Lucas Kanade using just a selected subset of pixels. They are faster. Both methods have specific applications. Lucas-Kanade is widely used in tracking. The farneback can be used for the analysis of more complex movement in image scene and furder segmentation based on these changes. As dense methods are slightly slower, the GPU and Cuda implementation can lead to great performance improvements to calculate optical flow for all pixels o
LBP cascade for detect head and people in opencv
LBP cascade free to download to use in opencv to detect people and heads. Code example and cascade description. All you need to write your own people head detector from the youtube video.
Cascade is trained on my own people and head datasets. There are no perfect but in some cases are better then default opencv cascades. They are just different.. For example you can count that the head detector have much more false detection than the people detector.. The shape and feature space is much more common and close to others shapes than the whole people detector.
Cascade is trained on my own people and head datasets. There are no perfect but in some cases are better then default opencv cascades. They are just different.. For example you can count that the head detector have much more false detection than the people detector.. The shape and feature space is much more common and close to others shapes than the whole people detector.
Issues with opencv detectMultiScale head and people detector
Please let me know if cascades worked as expected.. In code example there is ground threshold settings and reccomentation.
LBP cascade head detection properties
Sure you can find inside file.
<!--
This is just basic 16 stage lbp cascade head detector develop by
V.K. from https://funvision.blogspot.com
-->
<?xml version="1.0"?>
<opencv_storage>
<cascade>
<stageType>BOOST</stageType>
<featureType>LBP</featureType>
<height>38</height>
<width>38</width>
<stageParams>
<boostType>GAB</boostType>
<minHitRate>9.9999994039535522e-01</minHitRate>
<maxFalseAlarm>6.0000002384185791e-01</maxFalseAlarm>
<weightTrimRate>9.4999999999999996e-01</weightTrimRate>
<maxDepth>25</maxDepth>
<maxWeakCount>60</maxWeakCount></stageParams>
<featureParams>
<maxCatCount>256</maxCatCount>
<featSize>1</featSize></featureParams>
<stageNum>16</stageNum>
<stages>
New LBP cascade people detection properties
<!--
This is just basic 10 stage lbp cascade head detector develop by
V.K. from https://funvision.blogspot.com
-->
<?xml version="1.0"?>
<opencv_storage>
<cascade>
<stageType>BOOST</stageType>
<featureType>LBP</featureType>
<height>64</height>
<width>32</width>
<stageParams>
<boostType>GAB</boostType>
<minHitRate>9.9999499320983887e-01</minHitRate>
<maxFalseAlarm>3.0000001192092896e-01</maxFalseAlarm>
<weightTrimRate>9.4999999999999996e-01</weightTrimRate>
<maxDepth>20</maxDepth>
<maxWeakCount>80</maxWeakCount></stageParams>
<featureParams>
<maxCatCount>256</maxCatCount>
<featSize>1</featSize></featureParams>
<stageNum>10</stageNum>
<stages>
Opencv cascade for car detection conditions of use
Also, Do not worry about the condition of use. Use only on your own risk. That's it. The dataset to train this cascade is only mine. I also colect positive and negative data. I just want to say, that there is also no conditions based on the datasets. There is no others conditions of use. Maybe check the Opencv traincascade utility. Thanks. Yes share and cite. Just small minimal condition like send me a million dolars. Its up to you.
Head cascade and people cascade download link.
Head detection download link
People detection download link
Head and people detection tutorial code
This code is based on my previous tutorial Fast people detection.
// Name of the downloaded my cascades..
string cascadeHead = "cascadeH5.xml";
string cascadeName = "cascadG.xml";
// Load the cascade
CascadeClassifier detectorBody;
bool loaded1 = detectorBody.load(cascadeName);
CascadeClassifier detectorHead;
bool loaded2 = detectorHead.load(cascadeHead);
// save original make img gray
// draw rectangle back to the original colored sample
Mat original;
img.copyTo(original);
// Prepare vector for results
vector<Rect> human;
vector<Rect> head;
// Prepare gray image
cvtColor(img, img, CV_BGR2GRAY);
// equalize Histogram
equalizeHist(img, img);
// detect body and head in the img
// Set the proper min and max size for your case
detectorBody.detectMultiScale(img, human, 1.04, 4, 0 | 1, Size(30, 80), Size(80,200));
detectorHead.detectMultiScale(img, head, 1.1, 4, 0 | 1, Size(40, 40), Size(100, 100));
if (human.size() > 0) {
for (int gg = 0; gg < human.size(); gg++) {
rectangle(original, human[gg].tl(), human[gg].br(), Scalar(0, 0, 255), 2, 8, 0);
}
}
if (head.size() > 0) {
for (int gg = 0; gg < head.size(); gg++) {
rectangle(original, head[gg].tl(), head[gg].br(), Scalar(0, 0, 255), 2, 8, 0);
}
}
I want code for Real time Face Recognition System using LBP Algorithm code for opencv 3.1 (C++) in Linux.
ReplyDeleteContact Details:-
Email:- perrykakkar.1993@gmail.com
Ph. No:- +91-8930228000
Code is same cascade is different.. There is lots of cascade detect faces. I do not spent time to doing training of that detector..
Deletewhat a nice blog it is!
ReplyDeleteCan i share the video file??
yunjung.erica@gmail.com
Hi. I'm using the head cascade in my project.
ReplyDeleteAnd my question is if the parameters are the same with the face cascade. All this implemented from python. Also, what would be the correct syntax to call the cascade.
Thanks for your help.
Mam can you please provide me the head cascade, i urgently needed, please.Thanks in advance.
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ReplyDeleteDo you have implementation in Python? of the same LBP cascade?
ReplyDeleteI need some suggestions on training data more precisely. can you guide me to train my own cascade in a efficient way.
ReplyDeleteIt would be really helpful for me.
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