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Pixel Computations (PixCom)
Type: Information
Computes image pixel information.
Detailed Description
Computes and displays the real-world size of an image's pixels in feet and meters given an input of scan rate in microns/DPI and photo scale. This application is for information only and does not manipulate images.
Scan rate (microns)
Specifies the scan rate in microns. If this field is entered, the Scan rate (DPI) field should be left blank and will be automatically computed.
Scan rate (Dpi)
Specifies the scan rate in dots per inch. If this field is entered, the Scan rate (microns) should be left blank and will be automatically computed.
NOTE: If both the Scan rate (microns) and the Scan rate (Dpi) fields are entered then the value in the microns field will be used and the dots per inch will be computed.
Photo size
Select a photo size to use to compute image file sizes. Options include:
| • | 229 x 229 millimeters (9 x 9 inches) |
| • | 183 x 160 millimeters (7.2 x 6.3 inches) |
| • | 160 x 91 millimeters (6.3 x 3.6 inches) |
Black and white file size (MB)
Displays the resulting image file size for a black and white scan in mega-bytes.
Color file size (MB)
Displays the resulting image file size for a color scan in mega-bytes.
Photo scale (1:n)
Specifies the photo scale as a ratio. This will be used to compute the pixel sizes.
Pixel size (feet)
Displays the image's pixel size in feet.
Pixel size (meters)
Displays the image's pixel size in meters.
Compute button
Computes output fields based on current input parameters. This button must be pressed after an input field, such as Scan rate, is entered to show revised values.
Reset button
Clears all fields.
Help
Starts the help page.
Computations
The following constants are used:
1 Micron = .00003937 inches
1 inch = 25.4 millimeters