If you are on ccwimx53 and DEL 18.104.22.168 you are already on the latest version of Digi embedded Linux.
To display jpeg:
You can use the jpegdec gstreamer element to display still JPEG images in the screen.
# gst-launch multifilesrc location=/example.jpg ! jpegdec ! freeze ! mfw_v4lsink
# gst-launch filesrc location=/example.jpg ! jpegdec ! freeze ! mfw_isink
The JPEG images must have a resolution multiple of 16 to work properly with gstreamer's mfw_v4lsink and mfw_isink.
also please check those 2 threads for more info and potential workaround: