Mounting a complete disk image rescued by ddrescue

If you imaged the whole drive you can use offset option with mount command. mmls (from The Sleuth Kit) can show partitions within an image

$ mmls image -b
DOS Partition Table
Offset Sector: 0
Units are in 512-byte sectors

     Slot    Start        End          Length       Size    Description
00:  -----   0000000000   0000000000   0000000001   0512B   Primary Table (#0)
01:  -----   0000000001   0000000031   0000000031   0015K   Unallocated
02:  00:01   0000000032   0001646591   0001646560   0803M   DOS FAT16 (0x06)
03:  00:00   0001646592   0002013183   0000366592   0179M   DOS FAT16 (0x06)

Mount the DOS partition starting at block 32:

sudo mount -o loop,offset=16384 image mnt

(32 multiplied by 512 byte blocks = 16384)

For mounting a typical NTFS partition created by Windows use:

sudo mount -t ntfs -o r,force,loop,offset=32256 image mnt

(63 multiplied by 512 byte blocks = 32256)

Another solution is to use losetup to map the image to a block device, then kpartx to scan the loopback device and create block devices for each partition, and then mount those. Something like (untested)

losetup /device/loop0 /path/to/file.img
kpartx /dev/loop0
mount /device/mapper/loop0p1 /mntpath