Hi @kawahyu,
I think the code for chapter is OK. I too write the same code. JatsParser by @Vitaliy might not be programmed to parse the name of book and editor. Vitaliy may look into the matter.
For image, I suggest you upload image as dependent file with the XML galley. For eg if the name of image is image1.jpg, then code it like:
<graphic xlink:href="image1.jpg">
Just use relative link.
I have never come across conference preceedings in reference, so I will see answer for it and record it for future use.
Regards