File Formatting Preferences
|[download as pdf]||current for: v1.5.6|
The File Formatting Preferences panel is shown below:
Image/Map Format. Allows you to select the type (format) for the saved files, independently for images, x-ray maps, and color phase maps.
Image/Map Owner. Allows you to select the owner for images, x-ray maps, color phase maps, and spectra. Windows uses 3-letter extensions to specify the owner. Macintosh uses an invisible 4-character resource (the creator) to specify the owner.
Save as Displayed. Saves the image or map to disk exactly as it looks on the computer screen. This is useful if you have applied custom scaling to the raw image data and want to preserve the appearance. Warning: this checkbox will rescale the original data to new values - the original data will be lost!
Spectrum Probe Data Format. Specifies the data format for the spectrum data.
Spectrum Image Format. Specifies format options for spectrum-at-every-pixel. No further documentation is available at this time.
Selector to determine degree of JPEG compression. Units are dimensionless and inversely proportional to compression. High quality (100) is lowest compression. Low quality (0) is highest compression.
Printer DPI. The user can specify an arbitrary printer dpi (dots per inch) value for acquired images. There is often confusion about the meaning of this value. In Revolution, Printer DPI is the number inserted into the X- and Y-Resolution Tags of a TIFF file. You must understand how your imaging program interprets the TIFF Resolution Tags to predict the effect on printed image size. Depending on the program that you use, the results may not be what you expect. In Revolution, knowing the pixel dimensions of the image or map and the printer dpi, one can determine how large the image or map will be when printed. Note that a 512x512 image on the computer screen will print out smaller than 2" x 2" on paper (512 pixels divided by 300 dpi).
The 4pi setting for Printer DPI is synonymous with resolution in the Image Size window in Adobe Photoshop. Note that further manipulation of the image in the same window (for example, changing resolution, image width and height, and the ruler units) can lead to unexpected results when printed. Consult your image application manuals for complete information on these image attributes.
Note carefully that an image on screen has no printer dpi association until it is either saved or printed. When saved as a TIFF image, the listed Printer DPI setting is saved in the appropriate X- and Y-Resolution tags. When printed from Revolution, the listed Printer DPI setting is used. So for example, consider saving a TIFF image at 300 dpi to disk. If then printed from Revolution, it will be printed at 300 dpi. If one then changes the dpi field to 150 and prints from Revolution again (without resaving), the value 150 will be used, even though the file saved to disk has dpi = 300.
Revolution 1.5.x will correctly open a color TIFF with 8-bit color channels and with or without an alpha channel, which is ignored. In other words, Revolution can read standard 24- or 32-bit color TIFF images. Revolution can then correctly save out such an image again as a color TIFF. There are 3 issues involving any examples other than the ones just stated:
Grayscale images or maps with color overlays are not saved as color TIFFs even if the file format is set to TIFF.
Colorized x-ray maps with or without color overlays are not saved as color TIFFs even if the file format is set to TIFF.
Color Phase Maps are saved as color TIFFs if the File Format is set to TIFF.
The upshot of this is that, for example, color text overlays or color waveform overlays saved in TIFF images or maps will reopen with a grayscale equivalent. They will reopen in full color for Color Phase Maps. In general, to retain color in images and maps, save them in either Revolution format or jpeg or bmp/pict; TIFF should still be avoided. These issues will be resolved in a later release.