I found out that manually attach and stitch photo are easier that the preset automatic photo merge software. Thou, one need to master the skills and logic of the photo shop software so that one can manipulate the tools to serve your photo editing process.
Above, the photo that i merged using photo shop photo merge function. I pretty easy if you take the photo the right way but it will be a mess if not with horizontal problem, wide angle out shape, shadow and highlight differences on each shot. I don’t see any way for me to fix it using photo merge function. Maybe there are not or i just missed it. There are plenty way to fix some abnormality in the photo above. But I think by manually merge the photo it, one will have more control on the photo merging process.
Above photo was merged manually one by one with photo shop. The difficulties are to find out the match and same point for both photos. The use the mask layer to brush of the uneven side and with match color function, you can match the contrast, brightness and the color level for both photos you want to merge. It sound a little bit technical but if one get used to photo shop one will know it. I actually found out this technique while using the photo merge function on CS3. Seem that photo shop kindly enough to let the user see how the software actually does it.
I wonder if I can manually merge a photo with attachment on horizontal and vertical. Will let you all know after tested it.