Abstract painting is a broad artistic style that does not rely on the concrete representation of the real world but instead expresses concepts and emotions through color, shape, line, and texture. Abstract painting can be further divided into several subcategories. Here are some of the main ones:

Geometric Abstraction:

Emphasizes the use of geometric shapes and structures, such as squares, circles, and straight lines.

Representative artists include Kazimir Malevich and Piet Mondrian.

Lyrical Abstraction:

Expresses emotions through fluid lines and free forms.

Representative artists include Wassily Kandinsky and Jackson Pollock.

Abstract Expressionism:

Emphasizes the artist's personal expression and the direct expression of emotions.

It includes Action Painting and Color Field Painting.

Representative artists include Jackson Pollock, Willem de Kooning, and Mark Rothko.

Minimalism:

Pursues simplicity, using the fewest elements to achieve the greatest effect.

Representative artists include Frank Stella and Agnes Martin.

Hard-Edge Abstraction:

Emphasizes clear, precise edges and flat areas of color.

Representative artists include Ellsworth Kelly and Barnett Newman.

Abstract Landscape:

Though not directly depicting natural landscapes, it suggests or evokes the feeling of natural scenery through abstract elements.

Representative artists include Francis Bacon and William Tillyer.

Abstract Sculpture:

Related to abstract painting but involves three-dimensional space and materials.

Representative artists include Henry Moore and Alexander Calder.

Abstract Photography:

Uses photographic techniques to create abstract images rather than traditional representational photography.

Representative artists include Alfred Stieglitz and Jerry Uelsmann.

These categories are not entirely independent. Artists often cross multiple categories or combine different abstract styles within a single work. The charm of abstract painting lies in its diversity and openness, allowing both artists and viewers to interpret and experience it in a variety of ways.