RTMaps offers tools to deal with images : color space conversion, JPEG compression / decompression, and a muxer to display multiple images in only one.
Color space conversion
In the Image processing package, there is a RGB -> YUV and a YUV -> RGB component.
If what you want to do is more than that, you can go for the image_processing_opencv package, which has a Colorspace Converter component. This component has two properties : the input colorspace and the output colorspace.
Compression / Decompression JPEG
In the Image processing package, there are two components : JPEG compressor and JPEG decompressor.
Realize an image puzzle - Show several images in the same window !
In the opencv package, you have a Video Muxer component. You can choose the number of inputs, and parameters for each image : width and height for the output image, positions of the input images, etc...
Here are the signification of the properties :