Introduction: the procedure for digitizing images from printed originals utilizes image scanning hardware and software to create a TIFF format digital file, which can be manipulated or edited using image enhancement software.
Image scanning software available: HP DeskScan 2.3 (in staff creativity lab and LIST office)
a. The scanner should be warmed up:
The HP DeskScan software has a setting for faster scan versus warm up lamp before scanning. Use the Edit/Preferences/Image Quality = better illumination setting for best results.
b. Images should be placed in the center of the scanner bed:
The light source provides best illumination to the center of the platen
Each scanner has its own color and contrast bias. Scanner software controls can be used to correct the bias and improve quality of the initial scan. Careful adjustment before scanning will substantially reduce image editing time in Photoshop.
Saturation default = 50. Changing this setting to 40 removes the inaccurate red cast from sepia tone originals (on King Kong). The color adjustment may also be used to change the overall color balance of an image, if you want to intentionally alter the colors. Manipulate the distance and direction settings and observe the result.Tools / Highlight and Shadow:
In DeskScan II, use the Tools / Highlight and Shadow adjustment to define the lightest and darkest points in each image.Tools / Emphasis Adjustment:
Use the Highlight and Shadow settings in place of the Brightness and Contrast adjustments. Adjustments to the brightness and contrast settings may adversely affect image quality. (This principle is also valid in Adobe Photoshop, where the Levels adjustments will usually provide a clearer image than the brightness/contrast adjustment.)
- Select the Highlight button and place the crosshairs on the lightest area within the image
- Select the Shadow button and place the crosshairs on the darkest area within the image
The final scan will show superior contrast and definition.
For images with faded or exaggerated highlights and shadows, you can adjust the levels curve (similar to the Photoshop Image / Adjust / Levels feature) before scanning.Note: these settings are only active when their dialogue boxes are open. When you close the custom settings adjustment windows, the scanner reverts to default settings.
If you plan to use the image at a size larger or smaller than the original, adjust the image size before scanning. If you plan to create a full size image and a smaller, thumbnail version, scan at the largest size you need. Image quality deteriorates when files are resized in Photoshop, especially in the enlargement process.
I consider 5 x 7 inches as the ideal size for full screen images. Any original image which is smaller is scanned at an enlargement ratio to approximate 5 x 7 inches; images larger than 5 x 7 inches are scanned at a reduction ration to create files with image dimensions approximating 5 x 7 inches. This procedure facilitates the preparation of images for screen display and seems to produce a better result (with smaller digital files) than resizing to enlarge the image in Adobe Photoshop.
Image files should be numbered consecutively. Assign numbers starting at the top left of the page, in the following order:
top left, top right, bottom left, bottom right
Updated 29 August 1997