template-matching

How can I detect multiple occurrence of of an object in an Image

由 怎甘沉沦 提交于 2019-12-12 02:32:37
问题 Hi new to OpenCV and I am using JavaCV plugin in Unity to detect floorplan. I want to detect the position of windows, doors and few other objects in the floorplan image. First I used template matching for detection, but later I figured out it wont work if object is placed in different orientation or size of object is mismatched. I am using the device camera to capture the image hence image may get a little skewed hence I abandoned this technique. Following is the reference image and the

How to align two images based on a common feature with matchTemplate

由 ≯℡__Kan透↙ 提交于 2019-12-11 03:08:37
问题 I have two images which overlap. I'd like to align these two images. My current approach is to find a common feature (a marking) in both images. I'd then like to align these two images according to the place where the feature overlaps. The images aren't perfect, so I'm looking for some way that will align based the 'best' fit (most overlap). Originally I tried to align the images using feature matching through SIFT but the features matches were often incorrect/too few. Here's the code I used

Android - OpenCV template matching with camera picture

由 依然范特西╮ 提交于 2019-12-11 00:11:38
问题 I'm trying to make an application which compares a pictures taken from the camera with others stored in the SD card. If I try to compare two images stored in SD card it works fine, but when I try to use the camera it freezes. That's a part of my code: private boolean isSame = false; final int c = 2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (!OpenCVLoader.initDebug()) { System.out.println(

OpenCV Template Matching Drawing Rectangle Around Match

由 折月煮酒 提交于 2019-12-08 01:56:59
问题 I want to use template matching, i am utilizing a code that i found that does what i want where it keeps it in bitmap and get a return of bitmap, the problem is im not entirely sure how i can get to drawing in the rectangles. I am using only java, no native while creating an app for android. With the use of openCV which i am new at. I will get multiple matches so i would like to get drawn rectangles around those point and also be able to obtain a value for the locations of these matches.

OpenCV matchTemplate threshold values for different methods

由 天大地大妈咪最大 提交于 2019-12-07 12:08:54
问题 I searched a lot for finding the threshold values for the below mention methods. methods = ['cv2.TM_CCOEFF', 'cv2.TM_CCOEFF_NORMED', 'cv2.TM_CCORR', 'cv2.TM_CCORR_NORMED', 'cv2.TM_SQDIFF', cv2.TM_SQDIFF_NORMED'] I also tried to figure them out by myself but I could only find thresholds for 3 methods which have max value of 1.0. The other methods values were in range of 10^5. I would like to know the bounds of these methods. Can somebody point me in the right direction. My agenda is to loop

OpenCV Template Matching Drawing Rectangle Around Match

由 不羁岁月 提交于 2019-12-06 09:07:46
I want to use template matching, i am utilizing a code that i found that does what i want where it keeps it in bitmap and get a return of bitmap, the problem is im not entirely sure how i can get to drawing in the rectangles. I am using only java, no native while creating an app for android. With the use of openCV which i am new at. I will get multiple matches so i would like to get drawn rectangles around those point and also be able to obtain a value for the locations of these matches. mFind=new Mat(256, 192, CvType.CV_8UC4); Input = new Mat(256, 192, CvType.CV_8UC4); Mat mResult8u = new Mat

Understanding and evaluating template matching methods

由 半世苍凉 提交于 2019-12-06 08:23:55
问题 OpenCV has the matchTemplate() function, which operates by sliding the template input across the output, and generating an array output corresponding to the match. Where can I learn more about how to interpret the six TemplateMatchModes? I've read through and implemented code based on the tutorial, but other than understanding that one looks for minimum results for TM_SQDIFF for a match and maximums for the rest, I don't know how to interpret the different approaches, and the situations where

Template Matching in Android using openCV

由 余生长醉 提交于 2019-12-06 06:04:48
问题 I'm trying to match an image with the camera input in Android using template matching. When i try this with static 2 images like in here: OpenCV Template Matching example in Android, everything works just fine. But when I try to use the captured images from the camera, I do not get the correct result. Following is the code that I have written: String baseDir = Environment.getExternalStorageDirectory().getAbsolutePath(); Mat img = Highgui.imread(baseDir + "/mediaAppPhotos/img2.png"); Mat templ

OpenCV matchTemplate threshold values for different methods

由 此生再无相见时 提交于 2019-12-06 03:49:14
I searched a lot for finding the threshold values for the below mention methods. methods = ['cv2.TM_CCOEFF', 'cv2.TM_CCOEFF_NORMED', 'cv2.TM_CCORR', 'cv2.TM_CCORR_NORMED', 'cv2.TM_SQDIFF', cv2.TM_SQDIFF_NORMED'] I also tried to figure them out by myself but I could only find thresholds for 3 methods which have max value of 1.0. The other methods values were in range of 10^5. I would like to know the bounds of these methods. Can somebody point me in the right direction. My agenda is to loop through all the methods for template matching and get the best outcome.I went through the documentation

how to detect known objects in OpenCV?

由 僤鯓⒐⒋嵵緔 提交于 2019-12-06 02:29:34
问题 I am try to draw shapes in the window in real time. The shapes are like tangle ,rectangle ,circle , half or circle and "Z" in the screen using yellow color. The size and the shape may not be same to the original image. But Program know all the original shapes. Because they are predefined. I want to know how i can identify the correct shape. as an example, is there possible way to do this? can I use template matching for this? Please help me with this.. 回答1: You can use different methods to
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