An undocumented feature of VueScan is that it can convert digital camera images of film negatives to positives. I've found that it seems to work better for jpeg files than for RAW files or TIFFs, but you'll have to be the judge. One nice feature is that you can use VueScan's batch conversion feature to crop & convert all the jpegs in a folder at one time. You will still need to do some touch up after the conversion, but the resulting positives are fairly decent IMO.
ColorPerfect provides the best results for converting scanned film negatives, but ColorPerfect has a higher learning curve, is more time consuming to use, and does not have a batch conversion feature.
An Instructable that explains the process and includes some sample images is located here: