imread

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to do a basic colour conversion in python however I can't seem to get past the below error. I have re-installed python, opencv and tried on both python 3.4.3 (latest) and python 2.7 (which is on my Mac). I installed opencv using python's package manager opencv-python. Here is the code that fails: frame = cv2.imread('frames/frame%d.tiff' % count) frame_HSV= cv2.cvtColor(frame,cv2.COLOR_RGB2HSV) This is the error message: cv2.error: OpenCV(3.4.3) /Users/travis/build/skvark/opencv-python/opencv/modules/imgproc/src/color.cpp:181:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to implement an algorithm in computer vision and I want to try it on a set of pictures. The pictures are all in color, but I don't want to deal with that. I want to convert them to grayscale which is enough for testing the algorithm. How can I convert a color image to grayscale? I'm reading it with: x = imread('bla.jpg'); Is there any argument I can add to imread to read it as grayscale? Is there any way I change x to grayscale after reading it? 回答1: Use rgb2gray to strip hue and saturation (ie, convert to grayscale).

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have an algorithm that does some stuff. Among them, there is a conversion that works fine if I'm working on a CV_8UC3 image but goes wrong if the file type is C_16UC3 . This is some code: //new image is created Mat3w img(100,100,Vec3w(1000,0,0)); //Image Conversion - ERROR! cv::Mat inputSource; //saving the image here will work img.convertTo(inputSource, CV_64FC3); //saving the image here will not work -> black image The problem is that the CV_16UC3 image's processing result is an image of the right dimensions but fully black. The problem

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Here is my code I am running. I'm using Ubuntu trusty with g++ in Emacs. I'm getting the errors at the bottom of page but I could use help to figure them out. The program works, it uses the C wrappers for imread and imshow above the main in the code. The picture comes up but right after window opens i get long string of code as below...It must be my wrappers because the C++ imread and imshow work perfect..The wrappers were written by a software analyst though they are up for inclusion in OpenCv so I'm not sure what the issue is. Googling

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to use OpenCV in a servlet and this error pops up everytime I run the servlet. Here is the stacktrace for the same: SEVERE: Servlet.service() for servlet [com.patternrecognition.preprocessing.Preprocessing] in context with path **[/ImagePreprocessing] threw exception [Servlet execution threw an exception] with root cause java.lang.UnsatisfiedLinkError: org.opencv.highgui.Highgui.imread_0(Ljava/lang/String;I)J at org.opencv.highgui.Highgui.imread_0(Native Method) at org.opencv.highgui.Highgui.imread(Highgui.java:309)** at com

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: We have an OpenCV problem of opening (and writing) file paths that contain non-Ascii characters on Windows. I saw questions OpenCV imread with foreign characters and imread(openCV),QString unicodes but still didn't understand a proper way of solving the problem. As far I as I saw in the OpenCV source code, it uses fopen even on Windows (instead of _wfopen) and afaik fopen does not handle non-ascii characters on Windows. From the questions above I saw that there could be some trick using QStrings, but if it works what does it exactly do? How

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Hi friends i just now installed opencv and checking the basic code but it results in error. The code is import numpy as np import cv2 img = cv2 . imread ( 'C:\Users\Pravin\Desktop\a.jpeg' , 1 ) cv2 . namedWindow ( 'img' , cv2 . WINDOW_NORMAL ) cv2 . Waitkey ( 10000 ) cv2 . imshow ( 'cv2.WINDOW_NORMAL' , img ) cv2 . destoryAllWindows () The error for cv2.imshow() is Traceback ( most recent call last ): File " " , line 1 , in cv2 . imshow ( 'image' , img ) error : .. \. . \. . \src\opencv\modules\highgui\src\window . cpp : 261 :

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I would like to transmit an encoded image using USRP. The first step is to load the image using Matlab and encode it. The respective codes are shown as follows. function msg = genMsg1 %#codegen persistent msgStrSet count; if isempty(msgStrSet) count = 0; msgStrSet = imread('cameraman.tif'); % Load the image of cameraman.tif end msgtemp = dec2bin(msgStrSet); % Covert msgStrSet into binary value msg_1ine = msgtemp(count+1,:).'; % Take msgtemp line by line and tranpose it msg = str2num(msg_1ine); % Convert each line from string into column

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: is there any way to know in advance if an image used as an input to a system is in RGB or BGR format? I am using opencv with java API and i would like to convert an input image into grayscale or L a b* color space, and in opencv you have to specify first whether the image you want to convert is in RGB or BGR. update : the type of the image i am using is either .jpg or png 回答1: If your image is a BufferedImage then you can ask for his type with getType() , and test against the several constants (see: BufferedImage ). 回答2: When you use opencv

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Need help with an image I try to load and convert with OpenCV: Here is my code: templ = imread("Template.bmp",-1); cout<<"templ before convert: "<<type2str(templ.type())<<endl; templ.convertTo(templ,CV_8UC4); cout<<"templ after convert: "<<type2str(templ.type())<<endl; This gives me always CV_8UC3! Is the image not made for converting to 4 channels or something like this? Or do I need a scaling factor (read about sth like this)? Thanks for help, best regards! 回答1: cvtColor( src,dst, CV_BGR2BGRA ); 文章来源: OpenCV: imread gives CV_8UC3, can't