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Images

Images in MacLispix are associated with image windows - one image (or one stack) per window. The title bar of the window is the name of the image. This name can be changed.

• Redrawing windows. Windows are redrawn when they are uncovered. Some graphics are temporary and will not be redrawn. In other words, redrawing the window is a way to erase the temporary graphics. Redrawing occurs when:
  • The window is covered, and then uncovered.
  • The grow box is clicked on. This is the most convenient way.
  • The window is zoomed. (When the window is so large that the grow square is not on the screen, zooming the window is another convenient way.)
• Title this is the name of the image. Originally the name of the file, or a combination of the names of images that are its source (via an image operation), this name can be changed for convenience or readability. Often, needs to be shortened before writing an image file.

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  Details

Image windows are objects that have slots containing auxilliary information. Some of these slots are:

• Image array. This is the original data. These values are plotted, read out, etc., but are rarely changed. This is why scaling operations never need to be undone - subsequent scaling operations are unaffected by previous ones. Image operations such as gradients, subtraction, etc. usually generate a new window with a new image array - the old window and data are not changed. The few image operations that are done IN PLACE, that is, they replace the original data, are: Fill...menus, Flip menus, and the Invert Pixel values, Reverse Bytes, and Transpose menus. Also Shrink sum has the option of working IN PLACE (actually, a new window is made then old window is closed).
• Scaled Image array This is an 8 bit scaled version of the original data. It is this copy that is displayed. It is changed each time scaling is done.
• Note (annotation).
  • Input by user to document an image.
  • Can be input via MacLispix with the Annotate button.
  • TIFF files: will can be read from and written to the resource fork of the file. The Get Info box in the finder will also access the note.
  • The Note is not burned into the image - it is drawn temporarily like most graphics.

Types of Images and other windows

The windows are grouped into classes by the Windows menu.

• Image_Window
  • byte_image - normal type of gray level image. Image data can be bit, byte, integer, float. (example)
    • blob_image Special type of gray level image on which blobbing is done. The window has a list of blobs, a mask image, and other morphological information.
    • sblob_image Special type of gray level image on which super blobbing is done.
    • cch_image and ccch_image Scatter diagrams.
    • gstack Stack of gray level images.
    • display_rect_window Small (usually) rectangular region of an image, blown up, updated when source image is clicked.
  • overlay_image Color overlay image, or RGB color image.
    • cstack Stack of color (RGB) images.
• FRED (text) window
• Dialog
• (various) graphics windows