Feature detector vs dense detector

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first, must be looking at outdated opencv2.4 docs to come up with the list above,

as of opencv4.3 now (and many years later), the StarDetector is no more, also the DenseFeatureDetector got removed

so, all algos in the list above are feature detectors, a "dense" detector just samples points on a predefined grid and a scaled pyramid, not at possible corner locations

(i'd exclude GFFT and HarrisLaplace tough, those are more "corner" detectors and don't deliver KeyPoints)

btw, there is a new "dense" detector/descriptor called "Daisy" in opencv_contrib now