scanimage output

luca@g550jk ~> scanimage --device=pixma:MP495_192.168.0.40 -v > /tmp/output.png
[sanei_debug] Setting debug level of dll to 4.
[dll] sane_init: SANE dll backend version 1.0.13 from sane-backends 1.0.27
[dll] sane_init/read_dlld: attempting to open directory `./dll.d'
[dll] sane_init/read_dlld: attempting to open directory `/etc/sane.d/dll.d'
[dll] sane_init/read_dlld: using config directory `/etc/sane.d/dll.d'
[dll] add_backend: adding backend `net'
[dll] add_backend: adding backend `abaton'
[dll] add_backend: adding backend `agfafocus'
[dll] add_backend: adding backend `apple'
[dll] add_backend: adding backend `avision'
[dll] add_backend: adding backend `artec'
[dll] add_backend: adding backend `artec_eplus48u'
[dll] add_backend: adding backend `as6e'
[dll] add_backend: adding backend `bh'
[dll] add_backend: adding backend `canon'
[dll] add_backend: adding backend `canon630u'
[dll] add_backend: adding backend `canon_dr'
[dll] add_backend: adding backend `cardscan'
[dll] add_backend: adding backend `coolscan'
[dll] add_backend: adding backend `coolscan3'
[dll] add_backend: adding backend `dell1600n_net'
[dll] add_backend: adding backend `dmc'
[dll] add_backend: adding backend `epjitsu'
[dll] add_backend: adding backend `epson2'
[dll] add_backend: adding backend `epsonds'
[dll] add_backend: adding backend `fujitsu'
[dll] add_backend: adding backend `genesys'
[dll] add_backend: adding backend `gt68xx'
[dll] add_backend: adding backend `hp'
[dll] add_backend: adding backend `hp3900'
[dll] add_backend: adding backend `hpsj5s'
[dll] add_backend: adding backend `hp3500'
[dll] add_backend: adding backend `hp4200'
[dll] add_backend: adding backend `hp5400'
[dll] add_backend: adding backend `hp5590'
[dll] add_backend: adding backend `hpljm1005'
[dll] add_backend: adding backend `hs2p'
[dll] add_backend: adding backend `ibm'
[dll] add_backend: adding backend `kodak'
[dll] add_backend: adding backend `kodakaio'
[dll] add_backend: adding backend `kvs1025'
[dll] add_backend: adding backend `kvs20xx'
[dll] add_backend: adding backend `leo'
[dll] add_backend: adding backend `lexmark'
[dll] add_backend: adding backend `ma1509'
[dll] add_backend: adding backend `magicolor'
[dll] add_backend: adding backend `matsushita'
[dll] add_backend: adding backend `microtek'
[dll] add_backend: adding backend `microtek2'
[dll] add_backend: adding backend `mustek'
[dll] add_backend: adding backend `mustek_usb'
[dll] add_backend: adding backend `mustek_usb2'
[dll] add_backend: adding backend `nec'
[dll] add_backend: adding backend `niash'
[dll] add_backend: adding backend `pie'
[dll] add_backend: adding backend `pint'
[dll] add_backend: adding backend `pixma'
[dll] add_backend: adding backend `plustek'
[dll] add_backend: adding backend `qcam'
[dll] add_backend: adding backend `ricoh'
[dll] add_backend: adding backend `rts8891'
[dll] add_backend: adding backend `s9036'
[dll] add_backend: adding backend `sceptre'
[dll] add_backend: adding backend `sharp'
[dll] add_backend: adding backend `sm3600'
[dll] add_backend: adding backend `sm3840'
[dll] add_backend: adding backend `snapscan'
[dll] add_backend: adding backend `sp15c'
[dll] add_backend: adding backend `tamarack'
[dll] add_backend: adding backend `teco1'
[dll] add_backend: adding backend `teco2'
[dll] add_backend: adding backend `teco3'
[dll] add_backend: adding backend `u12'
[dll] add_backend: adding backend `umax'
[dll] add_backend: adding backend `umax1220u'
[dll] add_backend: adding backend `v4l'
[dll] add_backend: adding backend `xerox_mfp'
[dll] sane_open: trying to open `pixma:MP495_192.168.0.40'
[dll] load: searching backend `pixma' in `/usr/lib/sane'
[dll] load: trying to load `/usr/lib/sane/libsane-pixma.so.1'
[dll] load: dlopen()ing `/usr/lib/sane/libsane-pixma.so.1'
[dll] init: initializing backend `pixma'
[dll] init: backend `pixma' is version 1.0.17
[dll] sane_open: open successful
[dll] sane_get_option_descriptor(handle=0x16e7150,option=0)
[dll] sane_control_option(handle=0x16e7150,option=0,action=0,value=0x7ffc9d1a3e8c,info=(nil))
[dll] sane_get_option_descriptor(handle=0x16e7150,option=0)
[dll] sane_control_option(handle=0x16e7150,option=0,action=0,value=0x7ffc9d1a3dd0,info=(nil))
[dll] sane_get_option_descriptor(handle=0x16e7150,option=1)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=2)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=3)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=4)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=5)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=6)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=7)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=8)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=9)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=10)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=11)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=12)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=13)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=14)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=15)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=16)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=17)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=18)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=19)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=20)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=21)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=22)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=23)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=24)
[dll] sane_get_option_descriptor(handle=0x16e7150,option=25)
[dll] sane_control_option(handle=0x16e7150,option=13,action=0,value=0x60b640,info=(nil))
[dll] sane_control_option(handle=0x16e7150,option=11,action=0,value=0x7ffc9d1a3dd4,info=(nil))
[dll] sane_control_option(handle=0x16e7150,option=14,action=0,value=0x60b644,info=(nil))
[dll] sane_control_option(handle=0x16e7150,option=12,action=0,value=0x7ffc9d1a3dd4,info=(nil))
[dll] sane_control_option(handle=0x16e7150,option=11,action=0,value=0x7ffc9d1a3ec0,info=(nil))
[dll] sane_get_option_descriptor(handle=0x16e7150,option=13)
[dll] sane_control_option(handle=0x16e7150,option=13,action=1,value=0x7ffc9d1a3ee0,info=0x7ffc9d1a3dc4)
[dll] sane_control_option(handle=0x16e7150,option=12,action=0,value=0x7ffc9d1a3ec0,info=(nil))
[dll] sane_get_option_descriptor(handle=0x16e7150,option=14)
[dll] sane_control_option(handle=0x16e7150,option=14,action=1,value=0x7ffc9d1a3ee0,info=0x7ffc9d1a3dc4)
[dll] sane_start(handle=0x16e7150)
[dll] sane_get_parameters(handle=0x16e7150,params=0x7ffc9d1a3ec0)
scanimage: scanning image of size 638x877 pixels at 24 bits/pixel
scanimage: acquiring RGB frame
[dll] sane_read(handle=0x16e7150,data=0x16fdff0,maxlen=32768,lenp=0x7ffc9d1a3e94)
[bjnp] bjnp_open_tcp: ERROR - Can not connect to scanner: Connection refused
scanimage: min/max graylevel value = 255/0
scanimage: sane_read: Invalid argument
[dll] sane_cancel(handle=0x16e7150)
[dll] sane_close(handle=0x16e7150)
[dll] sane_exit: exiting
[dll] sane_exit: calling backend `pixma's exit function
[dll] sane_exit: finished