Sharpening an image for web and social media aims to enhance the details and clarity of the image, making it more visually appealing and easier to view on digital screens.

Unsharp Mask is a widely used sharpening technique for web and social media images. It selectively enhances the edges and details of the image without introducing significant noise or artifacts.

The primary difference between sharpening for print and sharpening for web and social media lies in the amount of sharpening applied. Images intended for print typically require more sharpening due to the higher resolution and larger viewing distances.

To avoid introducing artifacts when sharpening an image for web and social media, it is important to consider the image's resolution, the sharpening radius, and the sharpening amount. Balancing these factors helps ensure that the image is sharpened effectively without creating unwanted artifacts.

Twitter is primarily a microblogging platform, and while it allows users to share images, it is not as image-centric as platforms like Facebook, Instagram, and Pinterest.

For social media platforms like Facebook and Instagram, an image resolution of 2048 x 2048 pixels is generally recommended. This resolution provides a good balance between image quality and file size, ensuring that the image looks sharp and clear without being excessively large.

JPEG (Joint Photographic Experts Group) is a widely used file format for sharing images on the web and social media. It offers a good balance between image quality and file size, making it suitable for online sharing.

A sharpening mask allows you to selectively enhance specific areas of the image while leaving other areas unaffected. This is useful for emphasizing certain details or features in the image.

Median Filter is primarily used for noise reduction and not for sharpening images.

A high-pass filter for sharpening images preserves fine details while enhancing edges. It is particularly useful for sharpening images with a lot of fine detail.

Blur is not a sharpening artifact. It is the opposite of sharpening and refers to the loss of detail and clarity in an image.

For web and social media images, a sharpening radius of 1 pixel is generally recommended. This radius provides a good balance between sharpening and avoiding artifacts.

A sharpening amount of 100% is generally too strong for web and social media images. It can lead to excessive sharpening and artifacts.

For web and social media images, a sharpening threshold of 5 is generally recommended. This threshold helps to reduce noise and artifacts while still enhancing the image's details.

Median Filter is primarily used for noise reduction and not for sharpening images. It is not a common sharpening technique in Adobe Photoshop.