from 4/7 stream

Author: JeremyMorgan

find_cars.py

@@ -0,0 +1,106 @@
+import cv2
+import streamlink
+import numpy as np
+
+
+def get_stream_url(video_url):
+    streams = streamlink.streams(video_url)
+    return streams['best'].url
+
+
+video_url = "https://www.youtube.com/watch?v=b7lsZ-0KiJw"
+# video_url = "https://www.youtube.com/watch?v=R3YNscjcJOk"
+# video_url = "https://www.youtube.com/watch?v=e_WBuBqS9h8"
+stream_url = get_stream_url(video_url)
+
+
+def detect_vehicles(frame, classifier_path):
+
+    vehicle_cascade = cv2.CascadeClassifier(classifier_path)
+
+    # pre processing
+
+    # image = frame.resize((450, 250))
+    # image_arr = np.array(image)
+
+    # define the alpha and beta
+    alpha = 1.5  # Contrast control
+    beta = 10  # Brightness control
+
+    # call convertScaleAbs function
+    # adjusted = cv2.convertScaleAbs(frame, outimage, alpha=alpha, beta=beta)
+
+    image_arr = np.array(frame)
+
+    adjusted = cv2.convertScaleAbs(
+        image_arr, image_arr, alpha=alpha, beta=beta)
+
+    # make it gray!
+    gray = cv2.cvtColor(adjusted, cv2.COLOR_BGR2GRAY)
+    gray = cv2.equalizeHist(gray)
+
+    # blur
+    blur = cv2.GaussianBlur(gray, (3, 3), 0)
+
+    # sobely = cv2.Sobel(blur, cv2.CV_64F, 0, 1, ksize=5)
+
+    wide = cv2.Canny(blur, 50, 200)
+    mid = cv2.Canny(blur, 30, 150)
+    tight = cv2.Canny(blur, 210, 250)
+
+    kernel = np.ones((3, 3), np.uint8)
+    dilated_image = cv2.dilate(blur, kernel, iterations=1)
+
+    # output
+    finalimage = blur
+
+    # vehicles = vehicle_cascade.detectMultiScale(finalimage, 1.1, 1)
+    vehicles = vehicle_cascade.detectMultiScale(finalimage,
+                                                scaleFactor=1.1,
+                                                minNeighbors=3,
+                                                minSize=(30, 30),
+                                                flags=cv2.CASCADE_SCALE_IMAGE)
+
+    return finalimage, vehicles
+
+
+def main():
+    cv2.ocl.setUseOpenCL(False)
+
+    cap = cv2.VideoCapture(stream_url)
+    cap.set(cv2.CAP_PROP_FPS, 20)
+
+    classifier_path = "cars.xml"
+
+    while True:
+        ret, frame = cap.read()
+        if not ret:
+            break
+
+            # 1080 1920
+        height, width = frame.shape[:2]
+
+        output_size = (800, 800)
+
+        scaling_factor = min(output_size[0]/width, output_size[1]/height)
+        resized_image = cv2.resize(
+            frame, None, fx=scaling_factor, fy=scaling_factor, interpolation=cv2.INTER_AREA)
+
+        processed, vehicles = detect_vehicles(resized_image, classifier_path)
+
+        for (x, y, w, h) in vehicles:
+            cv2.rectangle(resized_image, (x, y),
+                          (x + w, y + h), (0, 255, 0), 2)
+
+        cv2.imshow('Pre Processing', processed)
+        cv2.imshow('Vehicle Detection', resized_image)
+
+        if cv2.waitKey(1) & 0xFF == ord('q'):
+            break
+
+    cap.release()
+    cv2.destroyAllWindows()
+
+
+if __name__ == "__main__":
+    main()

newimage.jpg

@@ -0,0 +1,31 @@
+import numpy as np
+import cv2
+import os
+import random
+
+canvas = np.zeros((255, 510, 3), dtype="uint8")
+
+for x in range(255):
+    cv2.line(canvas, (x, 0), (x, 255), (0, 0, x))
+    cv2.line(canvas, (509-x, 0), (509-x, 255), (0, 0, x))
+
+f = os.popen('cat /proc/cpuinfo | grep \'model name\' | uniq | cut -c 14-')
+m = os.popen('cat /proc/meminfo | grep MemFree')
+
+cpu = f.read()[:-1]
+memfree = m.read()[:-1]
+
+print(cpu)
+print(memfree)
+
+cv2.rectangle(canvas, (45, 156), (450, 95), (255, 255, 255), -1)
+
+font = cv2.FONT_HERSHEY_PLAIN
+
+cv2.putText(canvas, cpu, (60, 123), font, 1, (0, 0, 0), 2, cv2.LINE_AA)
+cv2.putText(canvas, memfree, (60, 145), font, 1, (0, 0, 0), 2, cv2.LINE_AA)
+
+cv2.imshow("Canvas", canvas)
+cv2.imwrite("newimage.jpg", canvas)
+
+cv2.waitKey(0)

opencvtest.py

@@ -0,0 +1,247 @@
+<#
+.Synopsis
+Activate a Python virtual environment for the current PowerShell session.
+
+.Description
+Pushes the python executable for a virtual environment to the front of the
+$Env:PATH environment variable and sets the prompt to signify that you are
+in a Python virtual environment. Makes use of the command line switches as
+well as the `pyvenv.cfg` file values present in the virtual environment.
+
+.Parameter VenvDir
+Path to the directory that contains the virtual environment to activate. The
+default value for this is the parent of the directory that the Activate.ps1
+script is located within.
+
+.Parameter Prompt
+The prompt prefix to display when this virtual environment is activated. By
+default, this prompt is the name of the virtual environment folder (VenvDir)
+surrounded by parentheses and followed by a single space (ie. '(.venv) ').
+
+.Example
+Activate.ps1
+Activates the Python virtual environment that contains the Activate.ps1 script.
+
+.Example
+Activate.ps1 -Verbose
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and shows extra information about the activation as it executes.
+
+.Example
+Activate.ps1 -VenvDir C:\Users\MyUser\Common\.venv
+Activates the Python virtual environment located in the specified location.
+
+.Example
+Activate.ps1 -Prompt "MyPython"
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and prefixes the current prompt with the specified string (surrounded in
+parentheses) while the virtual environment is active.
+
+.Notes
+On Windows, it may be required to enable this Activate.ps1 script by setting the
+execution policy for the user. You can do this by issuing the following PowerShell
+command:
+
+PS C:\> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
+
+For more information on Execution Policies: 
+https://go.microsoft.com/fwlink/?LinkID=135170
+
+#>
+Param(
+    [Parameter(Mandatory = $false)]
+    [String]
+    $VenvDir,
+    [Parameter(Mandatory = $false)]
+    [String]
+    $Prompt
+)
+
+<# Function declarations --------------------------------------------------- #>
+
+<#
+.Synopsis
+Remove all shell session elements added by the Activate script, including the
+addition of the virtual environment's Python executable from the beginning of
+the PATH variable.
+
+.Parameter NonDestructive
+If present, do not remove this function from the global namespace for the
+session.
+
+#>
+function global:deactivate ([switch]$NonDestructive) {
+    # Revert to original values
+
+    # The prior prompt:
+    if (Test-Path -Path Function:_OLD_VIRTUAL_PROMPT) {
+        Copy-Item -Path Function:_OLD_VIRTUAL_PROMPT -Destination Function:prompt
+        Remove-Item -Path Function:_OLD_VIRTUAL_PROMPT
+    }
+
+    # The prior PYTHONHOME:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PYTHONHOME) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME -Destination Env:PYTHONHOME
+        Remove-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME
+    }
+
+    # The prior PATH:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PATH) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PATH -Destination Env:PATH
+        Remove-Item -Path Env:_OLD_VIRTUAL_PATH
+    }
+
+    # Just remove the VIRTUAL_ENV altogether:
+    if (Test-Path -Path Env:VIRTUAL_ENV) {
+        Remove-Item -Path env:VIRTUAL_ENV
+    }
+
+    # Just remove VIRTUAL_ENV_PROMPT altogether.
+    if (Test-Path -Path Env:VIRTUAL_ENV_PROMPT) {
+        Remove-Item -Path env:VIRTUAL_ENV_PROMPT
+    }
+
+    # Just remove the _PYTHON_VENV_PROMPT_PREFIX altogether:
+    if (Get-Variable -Name "_PYTHON_VENV_PROMPT_PREFIX" -ErrorAction SilentlyContinue) {
+        Remove-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Scope Global -Force
+    }
+
+    # Leave deactivate function in the global namespace if requested:
+    if (-not $NonDestructive) {
+        Remove-Item -Path function:deactivate
+    }
+}
+
+<#
+.Description
+Get-PyVenvConfig parses the values from the pyvenv.cfg file located in the
+given folder, and returns them in a map.
+
+For each line in the pyvenv.cfg file, if that line can be parsed into exactly
+two strings separated by `=` (with any amount of whitespace surrounding the =)
+then it is considered a `key = value` line. The left hand string is the key,
+the right hand is the value.
+
+If the value starts with a `'` or a `"` then the first and last character is
+stripped from the value before being captured.
+
+.Parameter ConfigDir
+Path to the directory that contains the `pyvenv.cfg` file.
+#>
+function Get-PyVenvConfig(
+    [String]
+    $ConfigDir
+) {
+    Write-Verbose "Given ConfigDir=$ConfigDir, obtain values in pyvenv.cfg"
+
+    # Ensure the file exists, and issue a warning if it doesn't (but still allow the function to continue).
+    $pyvenvConfigPath = Join-Path -Resolve -Path $ConfigDir -ChildPath 'pyvenv.cfg' -ErrorAction Continue
+
+    # An empty map will be returned if no config file is found.
+    $pyvenvConfig = @{ }
+
+    if ($pyvenvConfigPath) {
+
+        Write-Verbose "File exists, parse `key = value` lines"
+        $pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath
+
+        $pyvenvConfigContent | ForEach-Object {
+            $keyval = $PSItem -split "\s*=\s*", 2
+            if ($keyval[0] -and $keyval[1]) {
+                $val = $keyval[1]
+
+                # Remove extraneous quotations around a string value.
+                if ("'""".Contains($val.Substring(0, 1))) {
+                    $val = $val.Substring(1, $val.Length - 2)
+                }
+
+                $pyvenvConfig[$keyval[0]] = $val
+                Write-Verbose "Adding Key: '$($keyval[0])'='$val'"
+            }
+        }
+    }
+    return $pyvenvConfig
+}
+
+
+<# Begin Activate script --------------------------------------------------- #>
+
+# Determine the containing directory of this script
+$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
+$VenvExecDir = Get-Item -Path $VenvExecPath
+
+Write-Verbose "Activation script is located in path: '$VenvExecPath'"
+Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)"
+Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)"
+
+# Set values required in priority: CmdLine, ConfigFile, Default
+# First, get the location of the virtual environment, it might not be
+# VenvExecDir if specified on the command line.
+if ($VenvDir) {
+    Write-Verbose "VenvDir given as parameter, using '$VenvDir' to determine values"
+}
+else {
+    Write-Verbose "VenvDir not given as a parameter, using parent directory name as VenvDir."
+    $VenvDir = $VenvExecDir.Parent.FullName.TrimEnd("\\/")
+    Write-Verbose "VenvDir=$VenvDir"
+}
+
+# Next, read the `pyvenv.cfg` file to determine any required value such
+# as `prompt`.
+$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir
+
+# Next, set the prompt from the command line, or the config file, or
+# just use the name of the virtual environment folder.
+if ($Prompt) {
+    Write-Verbose "Prompt specified as argument, using '$Prompt'"
+}
+else {
+    Write-Verbose "Prompt not specified as argument to script, checking pyvenv.cfg value"
+    if ($pyvenvCfg -and $pyvenvCfg['prompt']) {
+        Write-Verbose "  Setting based on value in pyvenv.cfg='$($pyvenvCfg['prompt'])'"
+        $Prompt = $pyvenvCfg['prompt'];
+    }
+    else {
+        Write-Verbose "  Setting prompt based on parent's directory's name. (Is the directory name passed to venv module when creating the virtual environment)"
+        Write-Verbose "  Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'"
+        $Prompt = Split-Path -Path $venvDir -Leaf
+    }
+}
+
+Write-Verbose "Prompt = '$Prompt'"
+Write-Verbose "VenvDir='$VenvDir'"
+
+# Deactivate any currently active virtual environment, but leave the
+# deactivate function in place.
+deactivate -nondestructive
+
+# Now set the environment variable VIRTUAL_ENV, used by many tools to determine
+# that there is an activated venv.
+$env:VIRTUAL_ENV = $VenvDir
+
+if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) {
+
+    Write-Verbose "Setting prompt to '$Prompt'"
+
+    # Set the prompt to include the env name
+    # Make sure _OLD_VIRTUAL_PROMPT is global
+    function global:_OLD_VIRTUAL_PROMPT { "" }
+    Copy-Item -Path function:prompt -Destination function:_OLD_VIRTUAL_PROMPT
+    New-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Description "Python virtual environment prompt prefix" -Scope Global -Option ReadOnly -Visibility Public -Value $Prompt
+
+    function global:prompt {
+        Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) "
+        _OLD_VIRTUAL_PROMPT
+    }
+    $env:VIRTUAL_ENV_PROMPT = $Prompt
+}
+
+# Clear PYTHONHOME
+if (Test-Path -Path Env:PYTHONHOME) {
+    Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME
+    Remove-Item -Path Env:PYTHONHOME
+}
+
+# Add the venv to the PATH
+Copy-Item -Path Env:PATH -Destination Env:_OLD_VIRTUAL_PATH
+$Env:PATH = "$VenvExecDir$([System.IO.Path]::PathSeparator)$Env:PATH"