Adobe photoshop is a professional and mature [image converter utility](http://www.rasteredge.com/how-to/csharp-imaging/image-converting/) , it helps you convert pdf to all sorts of image formats such as tiff,jpeg, bmp and so on.
hello, arronlee, supoost there are some difference between the two [bulk image converter](http://www.rasteredge.com/how-to/csharp-imaging/image-converting/) , the API is clearly different and the sampel codes we use. even some functions doesn't fit.
hi there rasteredge's image app have the function of [drawing on images c#](http://www.rasteredge.com/how-to/csharp-imaging/image-drawing-text/), if you are interesed in this aspect, you can take a look.