46 lines
1.8 KiB
PowerShell
46 lines
1.8 KiB
PowerShell
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$code = @"
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using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Runtime.InteropServices;
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public class ImageProcessor {
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public static void RemoveWhiteBg(string inputFile, string outputFile, int threshold) {
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Bitmap bmp = new Bitmap(inputFile);
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Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
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BitmapData bmpData = bmp.LockBits(rect, ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
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int bytes = Math.Abs(bmpData.Stride) * bmp.Height;
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byte[] rgbValues = new byte[bytes];
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Marshal.Copy(bmpData.Scan0, rgbValues, 0, bytes);
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for (int i = 0; i < rgbValues.Length; i += 4) {
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byte b = rgbValues[i];
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byte g = rgbValues[i + 1];
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byte r = rgbValues[i + 2];
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byte a = rgbValues[i + 3];
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float avg = (r + g + b) / 3f;
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if (avg > threshold && r > threshold - 10 && g > threshold - 10 && b > threshold - 10) {
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float factor = (avg - threshold) / (255f - threshold);
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int alpha = (int)(255 * (1 - factor));
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if (alpha < 0) alpha = 0;
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if (alpha > 255) alpha = 255;
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rgbValues[i] = 255;
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rgbValues[i + 1] = 255;
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rgbValues[i + 2] = 255;
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rgbValues[i + 3] = (byte)alpha;
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}
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}
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Marshal.Copy(rgbValues, 0, bmpData.Scan0, bytes);
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bmp.UnlockBits(bmpData);
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bmp.Save(outputFile, ImageFormat.Png);
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bmp.Dispose();
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}
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}
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"@
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Add-Type -TypeDefinition $code -ReferencedAssemblies System.Drawing
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[ImageProcessor]::RemoveWhiteBg("d:\Code\Project\X-Financial\web\src\assets\images\raw_documents.png", "d:\Code\Project\X-Financial\web\src\assets\images\hero-financial-decor.png", 235)
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Write-Host "Done"
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