Looking at the Exif metadata for the 'portrait' photo it is the orientation attribute which is triggering your PC photo viewer to rotate the picture. As the Humax is not using this you would need to rotate the actual picture and not just the metadata.
EXIF — this group of metadata is encoded in 22,168 bytes (21.6k)
Exif Image Size 2,048 × 1,536
Image Description
Y Cb Cr Positioning Co-sited
Exposure Time 1/40
F Number 3.50
Exposure Program Program AE
ISO 200
Exif Version 0221
Date/Time Original 2013:07:02 06:48:05
6 months, 28 days, 21 hours, 37 minutes, 22 seconds ago
Create Date 2013:07:02 06:48:05
6 months, 28 days, 21 hours, 37 minutes, 22 seconds ago
Components Configuration Y, Cb, Cr, -
Compressed Bits Per Pixel 4
Exposure Compensation 0
Max Aperture Value 3.5
Metering Mode Multi-segment
Light Source Unknown
Flash Off, Did not fire
Focal Length 6.3 mm
Exposure Mode Auto
Maker Note Sony (9,916 bytes binary data)
Flashpix Version 0100
Color Space sRGB
Interoperability Index R98 - DCF basic file (sRGB)
Interoperability Version 0100
File Source Digital Camera
Scene Type Directly photographed
Custom Rendered Normal
White Balance Auto
Scene Capture Type Standard
Contrast Normal
Saturation Normal
Sharpness Normal
Print Image Matching PrintIM%000300%00%00%02%00%02%00%01%00%00%00%01%01%01%00%00%00
Compression JPEG (old-style)
Make SONY
Camera Model Name DSC-H20
Orientation Rotate 90 CW
Modify Date 2013:07:02 06:48:05
6 months, 28 days, 21 hours, 37 minutes, 22 seconds ago
Resolution 72 pixels/inch
Thumbnail Length 11,340
| Fri 31 Jan 2014 13:30:21
#16 |