AmScope MU USB2.0, User Manual

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MU Series (Windows)
User’s Manual
Process Menu Tools
Filter
Erode - This morphological filter is useful when a user wishes to modify the size of the objects in the image, as
it erodes the edges of bright objects and enlarges the edges of dark ones.
Dilate - The “Dilate” filter if used if one wants to modify the size of the objects in the image, as it erodes the
dark objects and dilates the bright ones.
Open - This filter is useful if one wishes to modify the shape of objects in an image. If the image contains bright
objects on a dark field, the “Open” filter will smooth object contours, separate narrowly connected objects,
and remove small dark holes.
Close - This filter is useful if one wishes to modify the shape of objects in an image. If the image contains bright
objects on a dark field, the “Open” filter will fill gaps and enlarge protrustions to connect objects that are close
together.
Tophat - The “Tophat” filter detects and emphasizes points, or grains, that are brighter than the background.
There are 3 kernel sizes for this filter process. The radio buttons allow the user to select between them to se -
lect which best fits the grain size to detect.
Well - This filter detects and emphasizes grains that are darker than the background. There are 3 kernel sizes
for this processing method. The radio buttons change the size of the kernel--picking the one most closely
matching the grain of the desired detection area provides best results.
Gradient - The “Gradient” filter enhances edges in an image.
Watershed - The “Watershed” filter separates objects that are touching by eroding objects until they disap -
pear, then dilating them again, preventing them from touching. “Watershed“ doesn’t work with True Color
images, so, it must be converted to “Gray Scale” mode first before this will function.
Thinning - This filter reduces the image to its bare skeleton. When choosing this filter, the user must set the
threshold that determines whether a pixel is part of the subject or the background. Like the “Watershed” filter,
the image must be in “Gray Scale” mode before it will function.
Distance - The “Distance” filter is used to show the distance of pixels within blobs to the outer boundaries of
those blobs. After applying the distance filter, the background will be black. Only the area within the blobs will
have non-zero values (white). The values of each pixel within the blob will be a count of the shortest distance
from that pixel to the edge of the blob. Thus, all pixels a long the blob’s border will have a value of 1 since they
are one pixel away from the blob, while pixels that are a distance of 2 from the border will have the value 2,
and so on. This creates a distance map of the image. Like the above, “Gray Scale” mode must be used for this
filter to work.