IBM AC453A Still Image Display, Print Captured Images, Freeze/Unfreeze Video, Set Scaling Mode

CHAPTER 4: Operation

4.16 Still Image Display

Still images can be loaded when the standard Windows interface or screen is selected. To load an image, select the Load option from the Display menu. The dialog box displays two list boxes, one to select the directory or disk drive, the other to display image files available in the current directory. A file is selected by double-clicking on the file name in the list box, typing the name into an edit box, or selecting the file through the list box and clicking on the OK button. The Cancel button is provided to abort the file load. The file format is automatically detected. The following file types can be loaded:

a. Windows device-independent bitmap 24-bit RGB, 8-bit, and 4-bit

b.Targa 32-, 24-, and 16-bit RGB

c. PCX 8-bit color and 8-bit grey scale

d.TIFF (Tagged Image File Format) 24-bit RGB, 8-bit color, or 8-bit grey scale

e. IBM M-Motion (4:1:1) compressed luma/chroma format

A dialog box with the message “Unsupported file format” is displayed if you try to load a file that is not in one of the formats listed above.

4.17 Print Captured Images

To print captured images, select the Print option from the floating menu or from the Display menu of the menu bar. This brings up the Print dialog box supported by the default printer. If no default printer is selected, an error message is displayed.

4.18 Freeze/Unfreeze Video

Video can be frozen or unfrozen through the Freeze/Unfreeze option in the floating menu or in the Display menu in the menu bar. If live video is frozen and the TV Board style is changed to cabinet, the frozen video is unfrozen. This is done to prevent uninitialized parts of the video buffer from being exposed.

4.19 Set Scaling Mode

When resizing the video window, the aspect ratio can be forced to 4:3 by selecting the Proportional option in the Scale menu option in the floating menu or in the Display menu of the menu bar. Selecting Stretch instead of Proportional allows the user to arbitrarily size the video window (any aspect ratio is allowed).

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