For a raster to embroidery conversion, such as png to vip conversion, you will have to obtain a roper embroidery digitizer that be used to process bitmap picture (for example logo) and generate a stitch by stitch embroidery design from it that can then be sewn on a T-shirt or other piece of clothing.
Often requires manual editting and fixing out little mistakes and details, but png to vip conversion is certainly doable.