Will it make sense if I put a picture of sealed jars when my topic is about vacuum packed canning?
Yes. You can also use pictures like this picture of canned corn:
http://www.google.com/imgres?imgurl=http://www.bettycrocker.com/products/green-giant/images/product-group-vacuum-packed.gif&imgrefurl=http://www.bettycrocker.com/Products/Green-Giant/Products.aspx&usg=__Z8YRe5gcLz54dhhHcIRkjkJ3mmw=&h=149&w=150&sz=14&hl=en&start=19&zoom=1&tbnid=Kz44yYkuqDcz7M:&tbnh=111&tbnw=112&prev=/images%3Fq%3Dvacuum%2Bpacked%2Bcan%26um%3D1%26hl%3Den%26biw%3D788%26bih%3D398%26tbs%3Disch:10%2C958&um=1&itbs=1&iact=hc&vpx=441&vpy=156&dur=1875&hovh=119&hovw=120&tx=84&ty=62&ei=sJsiTe67BpuQnweFjemsDg&oei=fJsiTZf0GYiTnQettuDRDQ&esq=16&page=4&ndsp=8&ved=1t:429,r:6,s:19&biw=788&bih=398