Crop and Resize JPEG Image using C#

CropResizeJPEG_CSharp.md

Learn how to crop and resize JPEG images using C#

The following topics shall be covered in this article:

1. C# Image API to Crop and Resize JPEG
2. Crop JPEG Images using C#
3. Crop Image in Specific Size using C#
4. Resize JPEG Images in C#
5. Resize JPEG Images Proportionally in C#

CropResizeJPEG_CSharp_CropByRectangle.cs

// This code example demonstrates how to crop JPG image using crop by Rectangle approach.
// Load an existing image into an instance of RasterImage class
RasterImage rasterImage = (RasterImage)Image.Load(@"C:\Files\images\aspose_logo.jpg");

// Before cropping, the image should be cached for better performance
if (!rasterImage.IsCached)
{
    rasterImage.CacheData();
}

// Create an instance of Rectangle class with desired size
Rectangle rectangle = new Rectangle(35, 35, 580, 240);

// Perform the crop operation on object of Rectangle class
rasterImage.Crop(rectangle);

// Save the cropped image
rasterImage.Save(@"C:\Files\images\CroppingByRectangle_out.jpg");

CropResizeJPEG_CSharp_CropByShift.cs

// This code example demonstrates how to crop JPG image using crop by shift approach.
// Load an existing image into an instance of RasterImage class
RasterImage rasterImage = (RasterImage)Image.Load(@"C:\Files\images\aspose_logo.jpg");

// Before cropping, the image should be cached for better performance
if (!rasterImage.IsCached)
{
    rasterImage.CacheData();
}

// Define shift values for all four sides
int leftShift = 30;
int rightShift = 30;
int topShift = 30;
int bottomShift = 30;

// Based on the shift values, apply the cropping on image 
// Crop method will shift the image bounds toward the center of image
rasterImage.Crop(leftShift, rightShift, topShift, bottomShift);

// Save the cropped image
rasterImage.Save(@"C:\Files\images\cropped_out.jpg");

CropResizeJPEG_CSharp_Resize.cs

// This code example demonstrates how to crop JPG image using crop by Rectangle approach.
// Load an existing image
Image image = Image.Load(@"C:\Files\images\aspose_logo.jpg");

// New width and height
image.Resize(300, 100);

// Save the resized image
image.Save(@"C:\Files\images\SimpleResizing_out.jpg");

CropResizeJPEG_CSharp_ResizeProportionally.cs

// This code example demonstrates how to crop JPG image using crop by Rectangle approach.
// Load an existing image
Image image = Image.Load(@"C:\Files\images\sample.jpg");

// Width
int newWidth = image.Width / 2;
image.ResizeWidthProportionally(newWidth);

// Height
int newHeight = image.Height / 2;
image.ResizeHeightProportionally(newHeight);

// Define save options
JpegOptions saveOptions = new JpegOptions();
saveOptions.Quality = 100;

// Save the image
image.Save(@"C:\Files\images\sample_out.jpg", saveOptions);