Jose Pereira wrote: > I created a .cht and .cie file for the Datacolor SpyderCheckr color chart, > in case anyone finds it useful. Hi, thanks, but since these includes color patch values taken from the Datacolor website, I don't think I can include these in an Argyll release due to copyright. Datacolor have (presumably deliberately) provided the nominal patch values as a .jpg image, to frustrate third party use of the target. There are three possible workarounds: i) Each person could create their own reference file by typing in the values from the Datacolor website. ii) Someone could write an OCR module that is capable of parsing the image into reference numbers. iii) Someone could measure a chart and provide that as a reference. iv) Use a chart from a different vendor. Graeme Gill.