- has: searches what segmentation found, by the whole class name: has:dog, has:"dining table"
(has:table is a table, not a dining table). Plain words do not match segments.
- The catalog keeps each capture's segments (class, score, area) and its classes between newlines,
so a has: term is one contains per capture.
- Stats: "What is in the images", how many of the segmented images hold each class, each one a
has: search; shown even when nothing has been read by OCR. -stats logs it.
- Tests: has: (whole names, quoted names, case, combinations, plain words not matching).
