Stereo analysis
AnalyzedVerdict
Genuine stereo pair97%
The two photographs contain the viewpoint difference needed to produce genuine depth.
- Depth spread
- 8px
- The range of horizontal difference between the two views. More spread generally means more depth; 0–1 px usually indicates a monoview.
- Match
- 91%
- The share of usable picture detail that can be matched between the left and right views. A higher number means a more reliable comparison.
- Vertical
- 2px
- Vertical drift between matched details. Lower is better; 4 px or more can indicate camera movement, scan skew, or poor alignment.
A stereoview of the monitor Onondaga on the James River, published by E. & H. T. Anthony & Co., New York, with the negative credited to Brady & Co., Washington. Men in caps and brimmed hats occupy a rowboat at the riverbank, with the monitor’s low deck, smokestack, canvas awnings, and flag beyond. The yellow mount bears “Photographic History” and “The War for the Union,” and carries a green “War Views” label identifying the vessel and location. Scattered spotting appears across the photographs and mount, with wear and small losses along the card’s edges.
- Medium
- Stereoview
- Subject
- Civil, Civil War
- Catalogue no.
- MSV1441
