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Nikon Digital Eclipse DXM 1200

Option Settings Panel

The Option settings panel in the DXM 1200 ACT-1 control software can be utilized to configure various functions related to image capture. Among the variables controlled by this panel are image resolution, auto printing, automatic image enhancement, noise reduction, and color mode.

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The tutorial operates in a manner that is similar to the native Nikon software. Currently, working modules include the Reduce Resolution and Enhancement features, as well as the Color menu.

The ACT-1 control software is capable of capturing images using two resolution modes that are selectable in the Mode menu of the Photo settings control panel. High-resolution images can be acquired using the Fine mode, which features a resolution range between 12 and 0.3 million pixels. Images of lower resolution can be captured more quickly using the Quick mode that has a range between 1.3 and 0.3 million pixels. Even lower resolution images can also be acquired of selecting the resolution change ratio in the Option settings panel. By default, this option is set to the Off state with a resolution change ratio of 75 percent loaded into the menu. The feature is selected using a checkbox and is equipped with a pull-down menu to display the list of resolution reduction options.

To activate the Reduce Resolution feature, use the mouse cursor to place a check mark in the checkbox, indicating that the resolution change function is turned on. If the checkbox is clicked again, the check mark disappears, indicating that the resolution change function is again turned off. After activating the feature, use the pull-down menu to select a change ratio. The ratios available are 25 percent (highest reduction), 50 percent (medium reduction), and 75 percent (lowest reduction). For example, an image normally captured in Quick mode at a resolution of 1024 x 768 pixels would be resized to 768 x 576 pixels at 75 percent reduction, 512 x 384 pixels at 50 percent reduction, and 256 x 192 pixels at 25 percent reduction (all images are recorded at 72 pixels per inch).

A limited enhancement of digital images can be made automatically and immediately after acquisition by utilizing the Auto Enhancement feature in the Option settings panel. The default setting for this software routine is off. To enable the feature, choose the Option settings panel tab and use the mouse to place a check mark in the checkbox adjacent to the Auto Enhancement menu. In order to disable automatic enhancement of images, uncheck the checkbox. Digital enhancement is limited to contrast, color level, and sharpness. Adjustment of these variables can be accomplished either by using a set of up- and down-arrow buttons, or directly typing the values into the text input box next to the menu item. The default value for each enhancement feature is 0 with a normalized maximum value of 15. When this feature is selected, the enhancements are made to the digital image after capture, but before storage on the computer hard drive.

A choice of Color Mode for image capture can also be selected in the Option settings panel. The default setting for this feature is full-color positive images. Alternative choices are black & white and color negative images. The Color menu contains three radio buttons labeled Color, B&W, and Negative. Clicking on the appropriate radio button will enable the desired image color capture mode. Selecting the B&W option produces an image devoid of color, while using the Negative option results in an image that has inverted colors that mimic a chrome (transparency) negative.

Contributing Authors

John C. Long and Michael W. Davidson - National High Magnetic Field Laboratory, 1800 East Paul Dirac Dr., The Florida State University, Tallahassee, Florida, 32310.

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