Convert scanned contact sheet to images

Crop and Straighten Photos may not help in this case. Crop and Straighten Photos was designed to work with multiple prints arranged on a single flatbed scanner, where the space between each photo is solid white, and therefore easy for Photoshop to isolate and remove.

The problem with a scanned film contact sheet is that it is not a solid color between images. The film edges and leader can include frame numbers, text, bar codes, and other bits that were in the film. This confuses Crop and Straighten Photos. For one thing, in my test Crop and Straighten Photos returned inconsistent numbers of frames per image, instead of one image per frame.

Mark102030, there is one possible technique I just tested quickly:

1. Open the contact sheet in Photoshop. 
2. Use the Slice tool to draw a slice over each frame. Remember that you can use the Option-drag technique to duplicate selected slices, so one frame can quickly become six, and one strip of six can quickly be duplicated to six strips of six (36 exposures). And you can add Shift for a perfectly horizontal  or vertical duplicate and move.
3. Export using Save for Web (Legacy), which can export slices as individual files.

Here’s the thing: This might be scalable. For subsequent contact sheets:

1. Start with a copy of the Photoshop document you created above. 
2. Add the next contact sheet as the new top layer, at the same size as the previous contact sheet. (You can delete the old one.)
3. Make sure the existing slices are lined up with the frames of the new contact sheet; adjust with the Slice Select tool as needed. You probably have to do this each time because filmstrips are not in the same position in every contact sheet.
4. Export again, to a different folder. Now you have the images of the second contact sheet as individual image files. 

If you do this, it will help to go into the Slice Options of all of the auto-created non-image slices, and set them to No Image so they do not export. That way, all the images you get in the export folder will be film image frames only.

If you find a more reliable automatic way to do this, definitely do that instead of drawing slices. But if you don’t, using slices is one way to make it slightly less manual. I originally thought the Lightroom Classic cropped virtual copies was the way to go, but the Lightroom Classic crop tool is not efficient…for example, you can’t use the Shift key to constrain a crop rectangle move to exactly horizontal, which would help here; and you can’t zoom in while cropping.

Hopefully the OP realizes the quality will be less than optimal but my current scanning process is to create thumbnails approximate 600x800 so I can cull the images. Scanning can take a long time. While this creates a two step process, it allows me to load the images faster.