"easily picture" is correct and can be used in written English.
It is typically used to express that something can be understood or imagined with relative ease. Example sentence: With the help of the diagram, the process could be easily pictured.
Well, they can easily picture Henman on skis; Murray, in contrast, looks suspiciously like a snowboarder.
You can easily picture any of Fever's 12 tracks in the current top 10.
Mr. Immelt, who never did a foreign stint himself, can easily picture that.
Damon can easily picture a summer full of similar games, with a talented lineup supporting a strong rotation.
I could more easily picture her doing a brisk backstroke to the river's edge rather than allowing the waters to claim her, as poor mad Ophelia does.
Reading this chaotic if sporadically funny first novel by Cappellani, a Sicilian journalist, one can easily picture the author typing beneath a framed photograph of Elmore Leonard.
Not all of these couplings are that easily pictured.
In "Brazzaville Beach," as in his other work, Boyd, born in Ghana and educated in Scotland, France and England, sets off a domino effect of visual and psychological associations that lead the reader from richly drawn, easily pictured images of the natural world into a labyrinth of murky emotions.
As the Stranger says in the Statesman (see above § 2), some things are easily pictured: we can perceive the angler's essential activity, fishing by means of a special hook, and readily depict it.
But whereas Benedict XVI was a prolific scholar, a well-published theologian, someone one easily pictured alone at a desk in a book-filled office, Francis is more easily imagined at a parish fiesta laughing, eating, and talking with average people, and with the poor.
The observation that cumulative angles oscillate, and the way that cells move by extending pseudopods, inspired us to describe cell motion as a discrete, but easily pictured turn-run-turn model.
