Trim Mean Difference
trimmd parameter is the mean difference threshold for the trimming operation, and is only valid when
The default value is
11. This value defines the difference between each row of pixels while attempting to remove the border. Decreasing the threshold makes the imgix trim algorithm more aggressive about trimming. A decreased
trimmd value may still leave a line or two of border on an image, usually due to noise in the borders from image compression.
See the API specification for more information about this parameter's value ranges and format.