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Image Gaussian Blur

Apply Gaussian blur kernel for smooth noise reduction and image softening with precise control

Click to upload file or drag and drop file here

Maximum file size: 10MB Supported formats: image/jpeg, image/png, image/webp, image/gif, image/bmp, image/tiff

Image to apply Gaussian blur

Standard deviation for Gaussian distribution. Higher = more blur

Theoretical kernel size for Gaussian calculation. Sharp uses optimized algorithms internally.

Number of times to apply Gaussian blur. More iterations = stronger effect

Additional processing on the blurred output

Key Facts

Category
Design
Input Types
file, number, select
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Image Gaussian Blur tool allows you to apply a professional-grade Gaussian blur filter to your images, providing precise control over smoothing, noise reduction, and aesthetic softening.

When to Use

  • •When you need to reduce digital noise or graininess in high-ISO photographs.
  • •When you want to create a soft-focus effect for portraits or artistic backgrounds.
  • •When you need to obscure sensitive information or faces in an image for privacy.

How It Works

  • •Upload your image file in any supported format like JPEG, PNG, or WebP.
  • •Adjust the Sigma value and Kernel Size to define the intensity and reach of the blur effect.
  • •Select the number of iterations and an optional output mode to refine the final visual style.
  • •Process the image and download your smoothed, high-quality result.

Use Cases

Softening skin textures in portrait photography for a professional, polished look.
Creating depth-of-field effects by blurring background elements to make the subject stand out.
Removing high-frequency noise from low-light images to improve overall clarity.

Examples

1. Portrait Skin Smoothing

Photographer
Background
A portrait session resulted in images with slightly harsh skin textures that need a subtle, natural-looking soften.
Problem
The skin appears too sharp, highlighting imperfections.
How to Use
Upload the portrait, set a low Sigma value of 1.5, and use a 5x5 kernel for a gentle, natural smoothing effect.
Example Config
sigma: 1.5, kernelSize: 5, iterations: 1, outputMode: normal
Outcome
The skin texture is smoothed while maintaining the sharpness of the eyes and hair.

2. Privacy Masking

Background
Need to share a screenshot that contains sensitive personal information.
Problem
Sensitive text and data must be obscured to protect privacy.
How to Use
Upload the screenshot and apply a high Sigma value with multiple iterations to ensure the text is completely unreadable.
Example Config
sigma: 10, kernelSize: 11, iterations: 3, outputMode: normal
Outcome
The sensitive areas are heavily blurred, making the underlying text impossible to decipher.

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FAQ

What is the Sigma value?

Sigma represents the standard deviation of the Gaussian distribution. A higher value results in a more intense, widespread blur.

How does Kernel Size affect the image?

The kernel size determines the area of pixels used to calculate the blur. Larger kernels create a heavier, more noticeable blur effect.

Can I apply the blur multiple times?

Yes, you can use the 'Iterations' setting to apply the Gaussian blur effect multiple times in a single pass for a stronger result.

What file formats are supported?

The tool supports common image formats including JPEG, PNG, WebP, GIF, BMP, and TIFF.

What do the output modes do?

Output modes like 'Enhanced', 'Vintage', or 'Dramatic' apply additional color and contrast adjustments to the blurred image to achieve specific artistic looks.

API Documentation

Request Endpoint

POST /en/api/tools/image-gaussian

Request Parameters

Parameter Name Type Required Description
imageFile file (Upload required) Yes Image to apply Gaussian blur
sigma number No Standard deviation for Gaussian distribution. Higher = more blur
kernelSize select No Theoretical kernel size for Gaussian calculation. Sharp uses optimized algorithms internally.
iterations number No Number of times to apply Gaussian blur. More iterations = stronger effect
outputMode select No Additional processing on the blurred output

File type parameters need to be uploaded first via POST /upload/image-gaussian to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-image-gaussian": {
      "name": "image-gaussian",
      "description": "Apply Gaussian blur kernel for smooth noise reduction and image softening with precise control",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=image-gaussian",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]