You don’t plot an image, you plot data, either in the plain form, or resulting from equations, for images, you just display them, using functions like image Of course, images are in there raw form are data too, but they have special formats. solved What is means by Plotting an Image ?What is the purpose … Read more
Here is my Python/OpenCV code. I can get the region by a judicious choice of area thresholding. But this is not likely going to be robust for other images. Input: import cv2 import numpy as np # read image img = cv2.imread(“younas.jpg”) # convert img to grayscale gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) # median filter gray … Read more
You only need to carefully read the section B. Proposed methodology. It says something like this: Now our aim is to find the best set of values for these four parameters which can produce the optimal result and to perform this work PSO is used. P number of particles are initialized, each with four parameters … Read more
Jeru’s answer is correct for this case. If you have a case with bigger noise where morpholigocal operations won’t take them out, you can make a cutoff with the contour size, something like for contour in contours if cv2.contourArea(contour) > minimal_length before counting 1 solved How to calculate the number of shapes detected after thresholding
This is very difficult to answer given the vagueness of the question, but I’ll make a reproducible example of what I think you’re asking and will give a solution. Say I have a function that returns a data frame: MyFun <- function(x)randu[1:x,] And I have a data frame df that will act an input to … Read more
Anything through transparent regions in opacity mask will not be shown Here’s a complete example: Code: <Window x:Class=”WpfApp1.MainWindow” xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation” xmlns:x=”http://schemas.microsoft.com/winfx/2006/xaml” xmlns:d=”http://schemas.microsoft.com/expression/blend/2008″ xmlns:mc=”http://schemas.openxmlformats.org/markup-compatibility/2006″ mc:Ignorable=”d” SizeToContent=”WidthAndHeight”> <StackPanel Orientation=”Horizontal”> <Image Source=”rocks.png” Margin=”10″ /> <Image Source=”rocks.png” Margin=”10″> <Image.OpacityMask> <ImageBrush ImageSource=”mask1.png” /> </Image.OpacityMask> </Image> </StackPanel> </Window> https://learn.microsoft.com/en-us/dotnet/framework/wpf/graphics-multimedia/opacity-masks-overview#using-an-image-as-an-opacity-mask I have put everything you need to understand how it works, open the … Read more
You mean this? : import cv2 import numpy as np img = cv2.imread(“image.jpg”) hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV) mask = cv2.inRange(hsv, (0, 0, 0), (75, 255, 255)) imask = mask > 0 green = np.zeros_like(img, np.uint8) green[imask] = img[imask] cv2.imwrite(“result.png”, green) Output 1 solved How to remove the background of an object using OpenCV (Python) [closed]
I found some time to work on this. Now I understand what you tried to achieve with the offset computation, but I’m not sure whether yours is correct. Just change all the cv::Vec3b to unsigned char or uchar and load as grayscale, if wanted. Please try this code and maybe you’ll find your error: // … Read more
Looking at your comments, an appropriate solution would be: A = imread(‘Car.jpg’); % loads the image with a crop tool, select the region to be cropped B = imcrop(A); close % Displays the cropped region figure, imshow(B); 10 solved how to get a single feature vector from SIFT descriptor [closed]
[DllImport(@”../data/stasm_dll.dll”)] internal static extern void AsmSearchDll ( [Out] out Int32 pnlandmarks, [Out] out Int32[] landmarks, [In, MarshalAs(UnmanagedType.LPStr)] String image_name, [In, MarshalAs(UnmanagedType.LPStr)] String image_data, [In] Int32 width, [In] Int32 height, [In] Int32 is_color, [In, MarshalAs(UnmanagedType.LPStr)] String conf_file0, [In, MarshalAs(UnmanagedType.LPStr)] String conf_file1 ); IplImage img = cvlib.cvLoadImage(image_name, cvlib.CV_LOAD_IMAGE_COLOR); String imageData = Marshal.PtrToStringAnsi(img.imageData); AsmSearchDll(out nlandmarks, out landmarks, image_name, … Read more
To use default camera, you need to not pass -i argument. This command line works for me: path\\to\\cascade\\facefinder -m 128 -M 1024 -a 0.0 -q 5.0 -c 1.1 -t 0.1 All but first arguments are optional. solved How to give argument for webcam
It’s impossible to directly recover a colour image from the grey scale version of it. As correctly said by @Luis Mendo in the comments, the needed information are not physically stored there. What you can do is try to come up with a mapping between intensity level and colour, then play around with interpolation. This … Read more
Stride is usually reported in bytes, not pixels. Each pixel is 4 bytes (32 bits). This means that your offset or padding will be 0 (2048 bytes – 512*4 bytes). Each row of your bitmap will be 512 * 4 = 2018 bytes, and there will be 512 rows. This means that it is simply … Read more
If you want to “learn Java”, you should try it with something more doable. Try implementing Conway’s Game of Life for instance. You could start by showing the results in ASCII-Art or directly show it in a JFrame (for instance by extending JLabel to draw grids from a mask). You could then improve your application … Read more
Because Point2f is in the #include opencv2\core\core.hpp And Point2f rgbMat_center(rgbMat.cols/2.0F, rgbMat.rows/2.0F); this is wrong. rgbMat is pointer so it has to be like rgbMat->cols. 4 solved stuck in implementing filters in different direction in opencv [closed]