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118 lines
3.7 KiB
Markdown
118 lines
3.7 KiB
Markdown
*convert-image2ascii.ps1*
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================
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convert-image2ascii.ps1
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Parameters
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----------
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```powershell
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[<CommonParameters>]
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This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction,
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WarningVariable, OutBuffer, PipelineVariable, and OutVariable.
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```
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Script Content
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--------------
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```powershell
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<#
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.SYNOPSIS
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Converts images to ASCII art
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.DESCRIPTION
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This PowerShell script converts an image to ASCII art.
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.EXAMPLE
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PS> ./convert-image2ascii -InFile "C:\Folder\Image.jpg" -Width 32 -Height 32
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.NOTES
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Author: Fxbyy
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#>
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function Convert-ImageToAscii {
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[CmdletBinding(DefaultParameterSetName = 'AutoSize')]
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param (
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[Parameter(Mandatory = $true)]
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[string] $InFile,
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[Parameter(Mandatory = $false, ParameterSetName = 'CustomSize')]
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[int] $Width,
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[Parameter(Mandatory = $false, ParameterSetName = 'CustomSize')]
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[int] $Height,
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[Parameter(Mandatory = $false)]
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[switch] $Invert
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)
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begin {
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$tempFile = "$PSScriptRoot\temp.jpg"
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[void][System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
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$img = [System.Drawing.Image]::FromFile((Get-Item $InFile))
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if ($PSCmdlet.ParameterSetName -eq 'AutoSize') {
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[int]$Height = $Host.UI.RawUI.WindowSize.Height * ($img.Size.Width / $img.Size.Height)
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[int]$Width = $Height * ($img.Size.Width / $img.Size.Height)
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} else {
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if ($null -eq $Height -or $Height -eq 0) {
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[int]$Height = $Width * ($img.Size.Height / $img.Size.Width)
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} elseif ($null -eq $Width -or $Width -eq 0) {
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[int]$Width = $Height * ($img.Size.Width / $img.Size.Height)
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}
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}
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}
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process {
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$bmp = New-Object System.Drawing.Bitmap($Width, $Height)
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$graph = [System.Drawing.Graphics]::FromImage($bmp)
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$graph.DrawImage($img, 0, 0, $Width, $Height)
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$graph.Dispose()
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$img.Dispose()
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if ($Invert) {
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$symbols = " .,:~+t?xmoX#M%@"
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} else {
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$symbols = "@%M#Xomx?t+~:,. "
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}
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$res = ""
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foreach ($h in 1..$bmp.Height) {
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foreach ($w in 1..$bmp.Width) {
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$px = $bmp.GetPixel($w - 1, $h - 1)
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$brightness = (0.2126 * $px.R + 0.7152 * $px.G + 0.0722 * $px.B)
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if ($brightness -le 15) { $res += $symbols[0] + " " }
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elseif ($brightness -le 31) { $res += $symbols[1] + " " }
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elseif ($brightness -le 47) { $res += $symbols[2] + " " }
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elseif ($brightness -le 63) { $res += $symbols[3] + " " }
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elseif ($brightness -le 79) { $res += $symbols[4] + " " }
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elseif ($brightness -le 95) { $res += $symbols[5] + " " }
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elseif ($brightness -le 111) { $res += $symbols[6] + " " }
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elseif ($brightness -le 127) { $res += $symbols[7] + " " }
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elseif ($brightness -le 143) { $res += $symbols[8] + " " }
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elseif ($brightness -le 159) { $res += $symbols[9] + " " }
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elseif ($brightness -le 175) { $res += $symbols[10] + " " }
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elseif ($brightness -le 191) { $res += $symbols[11] + " " }
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elseif ($brightness -le 207) { $res += $symbols[12] + " " }
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elseif ($brightness -le 223) { $res += $symbols[13] + " " }
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elseif ($brightness -le 249) { $res += $symbols[14] + " " }
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else { $res += $symbols[15] + " " }
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}
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$res += "`n"
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}
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}
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end {
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$BitMap.Dispose()
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Remove-Item $tempFile -Force
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$res
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}
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}
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```
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*(generated by convert-ps2md.ps1 using the comment-based help of convert-image2ascii.ps1 as of 10/19/2023 08:11:37)*
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