The phrase "as a key image" is correct and usable in written English.
It can be used when discussing an important visual element or representation in a particular context, such as art, literature, or design.
Example: "In the novel, the river serves as a key image that symbolizes the passage of time and change."
Alternatives: "as a central motif" or "as a significant visual".
So even when I worked on a key image (such as the Monster pushing a boy in the classroom), I could still incorporate other illustrations and scenes into that set-piece.
The movie begins with a key image - a kind of signature image - of inscrutability and inaccessibility.
Archival footage was used and with the help of such techniques as chroma key, image warping, morphing, and rotoscoping, Hanks was integrated into it.
Here the Lena image was encrypted using a one-time-pad as a key. Figure 14 Transform encrypted sample images decoded using the PCT and DCT.
Experience has been identified as a key factor in image segmentation that is, in determining whether and how perceptual features will be grouped.
If you could create a list of all the distortions made, that would serve as a key to unwrapping the image back to it's original form.
You could also find pictures and paintings that include words as a key element of the image, with words forming a meaningful statement or graphic.
It's the visual memory that it appeals to: once seen, its overall shape and inner patterns, as well as its key images, seem printed on the brain.
Yet all of the upscale centers unabashedly use their poshness as a key selling point, displaying images of tanned patients playing volleyball and sailing, or showcasing polished hardwood floors and ocean vistas in their brochures.
A variety of visualization types can be used to provide the best view of the data: The 1C1V image viewer as a key element for HCS data allows users to visualize and edit images and image processing results.
