Imagej Open Multiple Images. In the imagej macro language it will look something like this. What is a stack.

Each channel is imported as a separate image stack. Like imagej does calculation with process image calculator with two images. Multiple image processor if your macro does not use the actual name of the image as e g.
A folder of images can be opened as a stack either by dragging and dropping the folder onto the imagej window or or by choosing file import image sequence to create a new stack simply choose file new image.
The approach is to first open imageb perform the operations using process math to create the output image open imagea and then use the process image calculator selecting imagea and output image with the multiply operation. I have tried shift and ctrl commands which normally work in other programs but it will not with image j. Tiff images can be 1 bit 8 bits 16 bits unsigned 32 bit real or rgb color. Is there a way in imagej to open multiple tiff stack files as one file where.