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Performs
arithmetic and logical operations between two images selected from
pop-up menus. The operation to be performed is also selected from a
pop-up menu. For each pixel, the arithmetic operation is performed, the
result is multiplied by the scale factor, the offset value is added,
and the final result is clipped to 8-bits (0-255). The operations are
carried out in the upper left corner of each image using the largest
common rectangle.
If Real Result is checked, the calibrated pixel values for the two input images are used and the result is stored, in the same window, as both 32-bit real and scaled 8-bit images. The 8-bit image is calibrated using a linear calibration function so that commands in NIH Image that only 'see' the 8-bit image (currently everything accept Arithmetic, Image Math and FFT) will use approximations of the real pixel values. Notice that the name in the result window's title bar is enclosed in angle brackets to indicate that the it contains a real image. Also note the white diamond, indicating that the scaled 8-bit result is density calibrated. |
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Steve Barrett November 2014 |
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