If uploded file format is .bmp, .tif,.tiff, etc it should convert atleast one of this format like .jpg/.jpeg/.png on button submit,
<ejs-uploader id="formFileCheque" autoUpload="false" multiple="false" allowedExtensions=".jpeg,.jpg,.png," maxFileSize="40000000"> </ejs-uploader>
<input id="btnSave" type="submit" value="Save" />