Convert a fraction string to a decimal.

Generate attachment meta data and create image sub-sizes for images.

Compare the existing image sub-sizes (as saved in the attachment meta) to the currently registered image sub-sizes, and return the difference.

Get extended image metadata, exif or iptc as available.

If any of the currently registered image sub-sizes are missing, create them and update the image meta data.

Filters the parameters for the attachment thumbnail creation.

Filters the “BIG image” threshold value.

Filters the image sizes generated for non-image mime types.

Filters whether the current image is displayable in the browser.

Filters the image sizes automatically generated when uploading an image.