Display

The Display group provides controls that allow you change the appearance of the image to optimize it for brightness and contrast.  Brief descriptions of the controls in the Display group are provided below.  For a more in-depth discussion of the Display options, read also Enhancing Images Using LUTs.

BCG Controls:  The Brightness, Contrast and Gamma (BCG) controls are used to adjust the visual qualities of your images.  Brief descriptions are provided below.  For a more in-depth discussion of these options, read Enhancing Images Using LUTs.

  • Brightness:   Move this slider up to increase, or down to decrease, the image brightness.  A value of 50 represents no change to the image values.
  • Contrast:  Move this slider up to increase, or down to decrease, the image contrast.  A value of 50 represents no change to the image values.
  • Gamma:  Move this slider up to increase the Gamma value (increase dark area contrast) or down to decrease the Gamma value (increase bright area contrast).  A value of 1 represents no change to the image values.

Note: The BGC controls change the appearance of your image as it is interpreted through the Lookup Table.  They do not actually change the pixel values in your image bitmap.  If you want to apply the changes to your bitmap you must write the values to the bitmap by using the Apply Display to Image button.

BL: Use this spin box to set the black level value to be used for the currently active image.  All pixels in the image with a pixel intensity value equal or less than the value specified here will be translated as having a value of zero (black).  All other pixels will be decreased proportionally to use the full intensity range.  Note that you can also have Image-Pro automatically determine an optimal black level for the image using the Best Fit tool.

WL: Use this spin box to set the white level value to be used for the currently active image.  All pixels in the image with a pixel intensity value equal or more than the value specified here will be translated as having the highest value possible for the pixel depth of the active image.  All other pixels will be increased proportionally to use the full intensity range.  Note that you can also have Image-Pro automatically determine an optimal black level for the image using the Best Fit tool.

Best Fit: Click this tool to have Image-Pro automatically reset the black level and white level in the image according to the currently selected Best Fit option.  To review and select options, click on the down arrow to reveal a menu of options, Click here to learn more about the options on this menu.

Apply Display to Image:  Use this tool to make the current Lookup Table adjustments permanent.  

When the Display controls are adjusted, the pixel values in your image bitmap are not actually modified; the controls modify a Lookup Table (LUT) through which your image is interpreted.   For example, when you increase brightness in an image, all of the intensity values in your image are increased by a certain amount.  The pixel values in your image are not actually changed; the changes you see on the screen are calculated by reading the image's original value and processing it through the Lookup Table.  The Apply Display to Image tool replaces the image's original pixel values with the LUT calculated values and deletes the lookup table.

 Reset Display: Click this tool to reset the entire lookup table (display range and contrast enhancement).  This action restores the image to its pre-adjusted appearance.

 Invert Display: Click this tool to reverse the values in the lookup table for your active image. The example below shows the original image, and the image with the inverted contrast.