User guide

Chemi Doc

4-13

Highlight Saturated Pixels

When this box is checked, any saturated pixels in the image will appear

highlighted in red in the scan window and in the pop-up image window. To

view/hide saturated pixels in the pop-up image window, use the Image >

Transform command.

Invert Display

This checkbox will switch light spots on a dark background to dark spots on a

light background, and visa versa.

Note: This will only affect how the image appears on your screen; it will not

change the image data.

Auto-scale

Clicking on Auto-scale will adjust your displayed image automatically. The

lightest part of the image will be set to the minimum intensity (e.g., white),

and the darkest will be set to the maximum intensity (e.g., black). You can

then “ﬁne tune” the display using the High, Low, and Gamma sliders

described below.

High/Low Sliders

If Auto-scale doesn’t give you the appearance you want, you can use the High

and Low sliders to redraw the image yourself. Dragging the High slider

handle to the left will make weak signals appear darker. Dragging the Low

slider handle to the right will reduce background noise.

You can also type speciﬁc High and Low values in the text boxes next to the

sliders. Clicking anywhere on the slider bars will move the sliders

incrementally.

Gamma Slider

Some images may be more effectively visualized if their data are mapped to

the computer screen in a nonlinear fashion. Adjusting the Gamma slider

handle changes the light and dark contrast nonlinearly.