536 rewrite tests/unit/image/test_imagepy to use truth images rather than hardcoded values#546

Jan-Willem merged 25 commits intomaincasangi/xradio:mainfrom

536-rewrite-testsunitimagetest_imagepy-to-use-truth-images-rather-than-hardcoded-valuescasangi/xradio:536-rewrite-testsunitimagetest_imagepy-to-use-truth-images-rather-than-hardcoded-valuesCopy head branch name to clipboard