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• How to install opencv_contrib on Windows ?

  6 mai 2017, par How to code

  I want to use the function createFisherFaceRecognizer() in python,but when I wrote down model = cv2.createFisherFaceRecognizer() or cv2.face.createFisherFaceRecognizer()
  Error will occurs :

  Traceback (most recent call last) :
  File "C :\Users\Administrator\Desktop\My projects\test\RecognizeMe.py", line 5, in
  model = cv2.face.createFisherFaceRecognizer()
  AttributeError : ’module’ object has no attribute ’face’

  I referenced the methods online and found that I should install opencv_contrib.But I was stucked when I was configureing the opencv using CMake.
  Error :

  CMake Error at cmake/OpenCVUtils.cmake:895 (file) : file DOWNLOAD
  HASH mismatch

  for file: [E:/opencv-3.1.0/sources/opencv-3.1.0/3rdparty/ffmpeg/downloads/35fe6ccdda6d7a04e9056b0d73b98e76/opencv_ffmpeg_64.dll]
  
    expected hash: [35fe6ccdda6d7a04e9056b0d73b98e76]
  
      actual hash: [5171a37169c5e695c556c85dc3103d13]
  
           status: [28;"Timeout was reached"]

  Call Stack (most recent call first) : 3rdparty/ffmpeg/ffmpeg.cmake:15
  (ocv_download) cmake/OpenCVFindLibsVideo.cmake:206 (include)
  CMakeLists.txt:536 (include)

  CMake Error at cmake/OpenCVUtils.cmake:899 (message) : Failed to
  download opencv_ffmpeg_64.dll. Status=28 ;"Timeout was reached" Call
  Stack (most recent call first) : 3rdparty/ffmpeg/ffmpeg.cmake:15
  (ocv_download) cmake/OpenCVFindLibsVideo.cmake:206 (include)
  CMakeLists.txt:536 (include)

  How to solve this problem ?Thank you for your answer !

• Convert a 3d graphic into rgb array

  22 avril 2017, par Praveen C. Naik

  Im working on a project that has 3d led cube (256*256*256).What software do i use to design the 3D model and for projecting the same on the LED cube.The LED used is RGB but the answer need not be for RGB. Even monochromatic LED is also fine.
  Ive tried checking for MATLAB , FFMPG , OPENCV and AUTOCAD.But none of then help.

  Objective : CREATE 3D MODEL => GENERATE MATRIX/ARRAY of colors => Project the matrix onto LED cube.
  The generator has to be dynamic such that any changes in to 3d model should reflect on the LED cube.Any well known simulator as such is encouraged.Please count on the above mentioned software if they can do the same, image processing through matlab/opencv is new for me.

  Input file : graphic 3D model drawn.
  Output file : array of representation of color(any).

• upload video on local host

  20 avril 2017, par chan jack

  when i upload video on local host have error #Unable to detect any supported library#

  @internal_information = InternalInformation.new(internal_information_params)

  if @internal_information.update(internal_information_params)

  respond_to do |format|

  this is my code below

  Model

  class InternalInformation < ApplicationRecord
  
    has_attached_file :video , styles: {
  
                                        :medium => { :geometry => "640x480", :format => 'mp4' },
  
                                        :thumb => { :geometry => "100x100#", :format => 'jpg', :time => 10 }
  
                                    }, :processors => [:transcoder]
  
    validates_attachment_content_type :video, content_type: /\Avideo\/.*\Z/
  
  end

  Controller

  def create
  
  @internal_information = InternalInformation.new(internal_information_params)
  
  
  
  respond_to do |format|
  
    if @internal_information.save
  
      format.html { redirect_to @internal_information, notice: 'Internal information was successfully created.' }
  
      format.json { render :show, status: :created, location: @internal_information }
  
    else
  
      format.html { render :new }
  
      format.json { render json: @internal_information.errors, status: :unprocessable_entity }
  
        end
  
      end
  
    end
  
  
  
    # PATCH/PUT /internal_informations/1
  
    # PATCH/PUT /internal_informations/1.json
  
    def update
  
  respond_to do |format|
  
    if @internal_information.update(internal_information_params)
  
      format.html { redirect_to @internal_information, notice: 'Internal information was successfully updated.' }
  
      format.json { render :show, status: :ok, location: @internal_information }
  
    else
  
      format.html { render :edit }
  
      format.json { render json: @internal_information.errors, status: :unprocessable_entity }
  
        end
  
      end
  
    end

  Show

  <%= javascript_include_tag 'swfobject' %>
  
  <p>&lt;%= notice %></p>
  
  
  
  <p>
  
    <strong>Title:</strong>
  
    &lt;%= @internal_information.Title %>
  
  </p>
  
  
  
  <p>
  
    &lt;%= video_player({:file => @internal_information.video.url(:medium), :image => @internal_information.video.url(:thumb)}) %>
  
  </p>
  
  
  
  &lt;%= link_to 'Edit', edit_internal_information_path(@internal_information) %> |
  
  &lt;%= link_to 'Back', internal_informations_path %>