Remapping Intensities Using Low Pass Filter

This option is designed to give an improved signal to noise ratio in the remapped intensities when compared with the standard pixel-by-pixel remapping.

Transform which buffer ?

Input the buffer to be transformed using the low pass filter and mapping function. You may use any DigImage buffer (the output may be to the same buffer).

Store result in which buffer ?

This entry specifies the buffer in which the result will be stored. This may be any buffer, including the one used as the source. The buffer will be made the current output buffer.

Remap intensities in Window or whole Screen ?

The intensities may be remapped in either a window within the source buffer <W> or the entire screen <S>. If a window is selected, the region of the destination buffer outside the window will be preserved.

{If processing in a window}

Window Selection: Region to remap intensities in

The standard window selection menu is produced to specifiy the window in the source buffer to be processed. For more information on how to use the window submenu, refer to [H Help] after the menu has started.

Formula to remap intensities ? Specify as a function of P or Q (Q=P/255)

Specify the formula used to translate the intensities in the source image to those in the destination image. This formula may be expressed in terms of the pixel intensities P (with values 0 to 255) or Q=P/255. In all cases it is your responsibility to ensure that the output range is scaled appropriately. Results exceeding 255 will be set to 255, while those less than zero will be set to zero.

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DigImage User Documentation

Stuart Dalziel, last page update: 19 February 1996