Using Adobe Photoshop
Currently, Photoshop is not being used for everyday, basic optimization of images, but it can be helpful under special circumstances.
Batch Processing Adjusted TIFs
See this page if you need to use the Photoshop action that allows you to batch save out of Bridge, rather than out of Camera Raw.
Sometimes it is more effective, from a resolution standpoint, to take multiple images of a large page and combine them into one file, especially when it's more of an informational text-based source (like a typed page) than a graphic or map.
If you need to do this, consult with Jeremiah to get an overview on techniques you will need. This is merely a reminder of the procedure.
- When capturing the item, try to shoot it in such a way that there will not be a big discrepancy in the lighting (press flat under glass, orient same direction)
- When optimizing the pages, make sure they are similarly aligned and cropped to the same size.
- Open Photoshop, then open the individual images.
- Adapt one of the files to have a canvas twice as large by
- going to Image --> Canvas Size...
- adjusting the Width to twice the number it currently is
- clicking on the anchor box in the middle of whatever side the current image should be on once you expand the canvas (it will appear as a dot, with arrows pointing out in all directions)
- Copy and paste the other image onto the new expanded canvas
- The original image on the doubled canvas (A) will be Layer Background and the new, added one (B) will be Layer 0
- In Layer 0, using the arrow keys or the Move Tool, scoot B into place until it overlays with A
- it might be helpful to make B translucent (adjust Opacity in the Layers panel)
- If any edges look fuzzy because things aren't exactly in alignment, use the eraser tool on A side (with Layer 0 selected)
- If the top and bottom of the page do not match up, you will need to use the Transform tool
- Turn off Snap by going to View and deselecting it
- Click Background Layer; say yes, you want to make it Layer 0
- Control + T to put the image into Transform mode
- Drag the little boxes at the top and bottom of the image until the edges line up -- you will probably need to adjust both sides several times, as a transformation to one affects the other
- Hit enter to apply the transformation
- When you're done, find the flyout menu in the top right corner of the Layers panel and choose Flatten Image
- Save under the new filename
Optimizing Photo Negatives
See Photo Negatives for circumstances and procedures.
Moiré Pattern Correction
Most moiré patterns can be eliminated in Bridge's Camera Raw editor. For those that can't, consult Jeremiah.
See the Moiré Patterns section on the page Capture Anomalies.
Note: These procedures are no longer part of our regular workflow
Photoshop Action Macros
- Multi image batch optimization (file and procedure)
- Polyborder Image Opt