Strange Files on my Mac Hard drive

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good day,

have noticed these strange files showing on hard drive.i have 27" imac has os x 10.6.8. don't know causes them show up. , appear harmless nevertheless i'd know what's causing them. i've attached screenshot of hard drives can see mean.

i've attempted open these files , here sample of info found in them:

kernel size = 5 (range 3..15)
volume thresh = 4.0000
t1 = 10
gray step = 256.00
gray diff thresh = 2560.0000
resolution = 300
scale = 100
effective res = 300

tdustnscratch: level = 2
tdustnscratch: start time: thu feb 12 12:08:02 2015
tdustnscratch: begin detect: thu feb 12 12:08:02 2015
tdustnscratch: begin applymedianfilter: thu feb 12 12:08:02 2015
tdustnscratch: end detect: thu feb 12 12:08:02 2015
tdustnscratch: begin reconstruct: thu feb 12 12:08:05 2015


info in each file looks above , repeats multiple times , other times it's once or twice.

me please?
 

attached files:

i think clue "tdustnscratch" lines.
guess have hp printer/scanner, , files generated when make changes "dust , scratch filter" in hp scanner software.

installing hp software messes os x permissions.
run disk utility, repair disk permissions.

can safely delete files random characters in name - or may normal files see, weird bug in hp scanner software.
may check @ hp web site updates printer/scanner software. issue might known issue hp has fixed update.
 


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