9. An apparatus comprising: a display; a memory configured to store instructions; and a processor communicatively coupled with the display and the memory and configured to execute the instructions, wherein the instructions cause the processor to access two or more sample images stored in the memory; transforming an input image using each of the sample images to generate output images; generate a metric for each output image corresponding to emotion conveyed by said output image, the emotions arranged along a plurality of emotion dimensions; receive a command to modify an emotion in the input image according to a specified emotion change identified by the user; obtain an emotion-transformed input image by selecting the output image whose generated metric is closest to the specified change; display the emotion-transformed image with the change in the particular emotion.
9. An apparatus comprising: a display; a memory configured to store instructions; and a processor communicatively coupled with the display and the memory and configured to execute the instructions, wherein the instructions cause the processor to access two or more sample images stored in the memory; transforming an input image using each of the sample images to generate output images; generate a metric for each output image corresponding to emotion conveyed by said output image, the emotions arranged along a plurality of emotion dimensions; receive a command to modify an emotion in the input image according to a specified emotion change identified by the user; obtain an emotion-transformed input image by selecting the output image whose generated metric is closest to the specified change; display the emotion-transformed image with the change in the particular emotion. 10. The apparatus according to claim 9 , wherein the metric comprises values corresponding to magnitudes of the emotions conveyed.