100town’s application utilizes the JavaTM Advanced Imaging API to handle the uploaded images from users. The current version of JAI support the following image formats: BMP, GIF (decoder only), FlashPix (decoder only), JPEG, PNG, PNM, TIFF, and WBMP.
You can test that if your image is understandable to 100town’s application by dragging and dropping it into the application. If the application pops up an error message it means it is not acceptable by our program. As an option you can go to find one image format converter to convert your image to a popular file format, for example, JPG, PNG etc.
It will be helpful if you have some knowledge about the file formats you are using. For example, if you want a smaller image size, file format of BMP should not be considered; if you want part of your image be transparent, you could consider formats of PNG, GIF etc.