What is the Imagist movement in American poetry? Imagism

This movement
resulted from a reaction to Victorian poetry that  Imagist poets felt was too sentimental,
moralizing, and too conventional is itsand form. Rejecting the conformity of such poetry, the
Imagist poets sought to concentrate on the precise rendering of images in .  Ezra Pound and
F. S. Flint first documented the Imagist Movement in the second decade of the twentieth
century.  They called for three primary precepts:  conciseness, musical rhythm, and the direct
treatment of the 'thing,' whether it is subjective or objective.

Between
1915-1917, American Amy Lowell edited a volume of the anthology Some Imagist
Poets.  One of her poems is entitled "Generations."   This poem is concise,
it has musical rhythm, and it treats its subject directly.  In this poem, Lowell initially
declares,

You are lke the stem

Of a
young beech-tree,

Straight and swaying,

Breaking out in
golden leaves.

Just as directly, Lowell ends her
poem:

But I am like a great oak under a cloudy
sky,

Watching a stripling beech grow up at my feet.

In conveying the contrast, Lowell employs much
light/dark : 

Your shadow is no shadow, but a scattered
sunshine:

And at night you pull the sky down to you

And
hood yourself in stars.