Imports github.com/stretchr/testify/require github.com/unidoc/unipdf/v3/common github.com/unidoc/unipdf/v3/internal/bitwise github.com/unidoc/unipdf/v3/internal/imageutil github.com/unidoc/unipdf/v3/internal/jbig2/basic github.com/unidoc/unipdf/v3/internal/jbig2/errors Standard library imports encoding/binary image math sort strings testing