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'm currently in Ubuntu 14.04, using python 2.7 and cv2. When I run this code: import numpy as np import cv2 img = cv2.imread('2015-05-27-191152.jpg',0) gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) it returns: File "face_detection.py", line 11, in gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) cv2.error: /home/arthurckl/Desktop/opencv-3.0.0-rc1/modules/imgproc/src/color.cpp:7564: error: (-215) scn == 3 || scn == 4 in function cvtColor I already searched here and one answer said that I could be loading my photo the wrong way, because it should

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 recently started working with openCV and python and decided to analyze some sample code to get an idea of how things are done. However, the sample code I found, keeps throwing this error: Traceback (most recent call last): File "test.py", line 9, in <module> img = cv2.imread(sys.argv[1],cv2.CV_LOAD_IMAGE_COLOR) ## Read image file AttributeError: 'module' object has no attribute 'CV_LOAD_IMAGE_COLOR' The code I was using can be found below: import cv2 import sys import numpy as np if len(sys.argv) != 2: ## Check for error in usage syntax

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 use OpenCV 3.0 and Ubuntu 14.04. I'm trying to compile a few codes on ubuntu using opencv. I get error "error: 'imread' is not a member of 'cv'" Due to my previous search knowledge, I tried compiling by adding "highgui.h". I use: $g++ main.cpp HOG.cpp HOGFeaturesOfBlock.cpp -I/usr/local/include/opencv -lml -lcvaux -highgui -lcv -lcxcore -o featureExtractor on terminal to compile. Any suggest? Regards. Can. 回答1: The following commands should work. If it doesn't work you should check if you set the include/lib files correctly. #include

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 read an image with scipy. However it does not accept the scipy.misc.imread part. What could be the cause of this? >>> import scipy >>> scipy.misc >>> scipy.misc.imread('test.tif') Traceback (most recent call last): File " ", line 1, in scipy.misc.imread('test.tif') AttributeError: 'module' object has no attribute 'imread' 回答1: You need to install Pillow (formerly PIL ). From the docs on scipy.misc : Note that Pillow is not a dependency of SciPy but the image manipulation functions indicated in the list below are not available

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: I'm trying to use matplotlib to read in an RGB image and convert it to grayscale. In matlab I use this: img = rgb2gray ( imread ( 'image.png' )); In the matplotlib tutorial they don't cover it. They just read in the image import matplotlib . image as mpimg img = mpimg . imread ( 'image.png' ) and then they slice the array, but that's not the same thing as converting RGB to grayscale from what I understand. lum_img = img [:,:, 0 ] I find it hard to believe that numpy or matplotlib doesn't have a built-in function to convert from rgb

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 wondering if we - the Matlab users can get the code of some functions in Matlab (like fft - fast fourier transform, dwt - descrete wavelet transform, and so on.) Just in case we want to edit something to adapt with what we need. Is it possible in Matlab? and if so, how can we get the code? Thank you. 回答1: As already mentioned, lots of MATLAB functions are written in MATLAB, so you can see the source. For performance reasons, some things are implemented in native code, or use external libraries. In the case of FFT, MATLAB uses the FFTW

1.jieba库的基本介绍 (1)、jieba是优秀的中文分词第三方库 中文文本需要通过分词获得单个的词语 jieba是优秀的中文分词第三方库，需要额外安装 jieba库提供三种分词模式，最简单只需掌握一个函数 (2)、jieba分词的原理 Jieba 分词依靠中文词库 利用一个中文词库，确定汉字之间的关联概率 汉字间概率大的组成词组，形成分词结果 除了分词，用户还可以添加自定义的词组 2.jieba库使用说明 (1)、 jieba 分词的三种模式 精确模式、全模式、搜索引擎模式 精确模式：把文本精确的切分开，不存在冗余单词 全模式：把文本中所有可能的词语都扫描出来，有冗余 搜索引擎模式：在精确模式基础上，对长词再次切分 3、wordcloud wordcloud 是优秀的词云展示第三方库，以词语为基本单位，通过图形可视化的方式，更加直观和艺术的展示文本。 基本使用 wordcloud 库把词云当作一个WordCloud对象 wordcloud.WordCloud()代表一个文本对应的词云 可以根据文本中词语出现的频率等参数绘制词云 绘制词云的形状、尺寸和颜色均可设定 以WordCloud对象为基础，配置参数、加载文本、输出文件 常规方法 方法 描述 w.generate ('分割后的分词') 向 WordCloud 对象中加载文本txt。 w.generate('python

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 been trying to load .png files with transparency channel (RGB and Alph) with no luck. It appears that openCV strips the 4th channel out of the image. Is there any method to load the image with the complete 4 channels including the alpha channel even if I had to modify the OpenCV source code and rebuild it 回答1: If you are using OpenCV 2 or OpenCV 3 you should use IMREAD_* flags (as mentioned at here ). C++ using namespace cv; Mat image = imread("image.png", IMREAD_UNCHANGED); Python import cv2 im = cv2.imread("image.png", cv2.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): 由 翻译 强力驱动 问题: cv2.imread is always returning NoneType . I am using python version 2.7 and OpenCV 2.4.6 on 64 bit Windows 7. Maybe it's some kind of bug or permissions issue because the exact same installation of python and cv2 packages in another computer works correctly. Here's the code: im = cv2 . imread ( "D:\testdata\some.tif" , CV_LOAD_IMAGE_COLOR ) I downloaded OpenCV from http://www.lfd.uci.edu/~gohlke/pythonlibs/#opencv . Any clue would be appreciated. 回答1: It might indeed be an OpenCV bug that is not resolved yet. cv2.imread is not

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: I read an image in matlab using input = imread ( 'sample.jpeg' ); Then I do imhist ( input ); It gives this error: ??? Error using ==> iptcheckinput Function IMHIST expected its first input , I or X , to be two - dimensional . Error in ==> imhist > parse_inputs at 275 iptcheckinput ( a , { 'double' , 'uint8' , 'logical' , 'uint16' , 'int16' , 'single' }, ... Error in ==> imhist at 57 [ a , n , isScaled , top , map ] = parse_inputs ( varargin {:}); After running size(input) , I see my input image is of size 300x200x3 . I know the