These waist lines should not be grouped under one construction name. The short purple reference has a broader marked middle area, while the long pink and purple models show strong lines across close-fitting surfaces. A clearly high skirt join remains unconfirmed in the shiny long look. The black close view places shaped upper pieces above a patterned middle.
None of the pictures clearly establishes an Empire join immediately below the bust. Their value is therefore in distinguishing features: which line is decorative, which belongs to a cup shape and where does the actual connection between bodice and skirt need clarification? Follow the area beneath the conspicuous edge rather than naming that edge alone.
The individual images prepare different questions for a fitting. Compare your preferred shape with an actual documented garment afterwards, adding side and rear views. Material, stretch and internal support are not secure image information either. A precise visible description helps locate the contour you enjoy, even if a different construction ultimately matches your idea better than the original search term.
