CommonNetFuncs.Images 3.6.18

CommonNetFuncs.Images

This project contains helper methods for dealing with base64 image encoding and image optimization.

Contents

• CommonNetFuncs.Images
  • Contents
  • Base64
    • Base64 Usage Examples
      • ConvertImageFileToBase64
      • CleanImageValue
      • ImageSaveToFile
      • IsValidBase64Image
  • Optimizer
    • Optimizer Usage Examples
      • OptimizeImage

Base64

Helper methods for dealing with Base64 image encoding.

Base64 Usage Examples

<details> <summary><h3>Usage Examples</h3></summary>

ConvertImageFileToBase64

Converts an image file or stream to a Base64 string.

string base64String = ConvertImageFileToBase64(@"C:\path\to\image.jpg"); // Returns the Base64 string representation of the image file.

CleanImageValue [Obsolete, please use ExtractBase64]

Attempts to clean a Base64 string by removing any metadata or unwanted characters that may come with it when reading from an HTML element.

string base64String = "data:image/png;base64, iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==";
string? cleanedBase64 = CleanImageValue(base64String); // "iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="

ExtractBase64

Attempts to clean a CSS background image containing a Base64 string by removing any metadata or unwanted characters that may come with it when reading from an HTML element. Validates that the Base64 string is a valid image format.

string base64String = "data:image/png;base64, iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==";
string? cleanedBase64 = base64String.ExtractBase64(); // "iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="

ImageSaveToFile

Save a Base64 string to an image file.

string base64String = "iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==";
ImageSaveToFile(base64String, @"C:\path\to\output_image.png"); // Saves the Base64 string as an image file at the specified path.

IsValidBase64Image

Checks to see if a Base64 string is a valid image format.

string base64String = "iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==";
bool isValid = IsValidBase64Image(base64String); // true

</details>

Manipulation

Helper methods for manipulating images, such as resizing, and changing image quality.

Manipulation Usage Examples

<details> <summary><h3>Usage Examples</h3></summary>

ResizeImage

Resizes an image to the specified width and height, maintaining the aspect ratio if desired.

await ResizeImage(@"C:\path\to\input_image.jpg", @"C:\path\to\output_image.jpg", 800, 600); // "C:\path\to\output_image.jpg" contains the 800px x 600px resized image.

ConvertImageFormat

Converts an image from one format to another (e.g., JPEG to PNG).

await ConvertImageFormat(@"C:\path\to\input_image.jpg", @"C:\path\to\output_image.png", PngFormat.Instance); // "C:\path\to\output_image.png" contains the converted image in png format.

ReduceImageQuality

Reduces the quality of an image by applying a specified JPEG quality level, which can help in reducing file size. Neither input nor output are required to be JPEG format.

await ReduceImageQuality(@"C:\path\to\input_image.jpg", @"C:\path\to\output_image.jpg", 50); // "C:\path\to\output_image.jpg" contains the image with reduced 50% quality

TryDetectImageType

Detects the image format of a file based on its content, returning the format as a string.

TryDetectImageType(@"C:\path\to\input_image.jpg", out IImageFormat? format); // Returns true and format is the "JPEG" IImageFormat.

TryGetMetadata

Attempts to retrieve ImageMetadata from an image file.

TryGetMetadata(@"C:\path\to\input_image.jpg", out ImageMetadata metadata); // Returns ImageMetadata with properties like Width, Height, Format, etc.

</details>

Optimizer

Helper methods for optimizing images.

Optimizer Usage Examples

<details> <summary><h3>Usage Examples</h3></summary>

OptimizeImage

Optimizes an image by reducing its file size without sacrificing quality using gifsicle, jpegoptim, or optipng CLI tools depending on the image format.

await OptimizeImage(@"C:\path\to\input_image.jpg", @"C:\path\to\output_image.jpg"); // "C:\path\to\output_image.jpg" contains the optimized image.

</details>