ImageResizeStep is a pipeline step that resizes an image, scaling up or down as needed to comply with the specified output height/width. Usually, both height and width are specified. However, if only one is specified, the other value is calculated based on the aspect ration of the input image. When both height and width are specified, and the aspect ratios of the input doesn't match the aspect ratio of the output, (for example, 100x200 in, 200x200 out) the
aspectRatioHandling setting is used to determine how to handle this situation.