ext/rfreeimage/rfi_main.c in rfreeimage-0.1.3 vs ext/rfreeimage/rfi_main.c in rfreeimage-0.1.5

@@ -99,11 +99,13 @@
 		free(filename);
 		rb_raise(rb_eIOError, "Invalid image file");
 	}
 
 	if (ping) flags |= FIF_LOAD_NOPIXELS;
-	if (in_fif == FIF_JPEG) flags |= JPEG_EXIFROTATE;
+	// use JPEG_ACCURATE to keep sync with opencv
+	if (in_fif == FIF_JPEG)
+		flags |= JPEG_EXIFROTATE | JPEG_ACCURATE;
 	orig = FreeImage_Load(in_fif, filename, flags);
 	free(filename);
 	if (!orig)
 		rb_raise(rb_eIOError, "Fail to load image file");
 	if (ping) {
@@ -125,10 +127,11 @@
 static void
 rd_image_blob(VALUE clazz, VALUE blob, struct native_image *img, unsigned int bpp, BOOL ping)
 {
 	FIBITMAP *h = NULL, *orig = NULL;
 	FIMEMORY *fmh;
+	int flags = 0;
 	FREE_IMAGE_FORMAT in_fif;
 
 	Check_Type(blob, T_STRING);
 	fmh = FreeImage_OpenMemory((BYTE*)RSTRING_PTR(blob), RSTRING_LEN(blob));
 
@@ -136,10 +139,13 @@
 	if (in_fif == FIF_UNKNOWN) {
 		FreeImage_CloseMemory(fmh);
 		rb_raise(rb_eIOError, "Invalid image blob");
 	}
 
-	orig = FreeImage_LoadFromMemory(in_fif, fmh, ping ? FIF_LOAD_NOPIXELS : 0 );
+	if (ping) flags |= FIF_LOAD_NOPIXELS;
+	if (in_fif == FIF_JPEG)
+		flags |= JPEG_EXIFROTATE | JPEG_ACCURATE;
+	orig = FreeImage_LoadFromMemory(in_fif, fmh, flags);
 	FreeImage_CloseMemory(fmh);
 	if (!orig)
 		rb_raise(rb_eIOError, "Fail to load image from memory");
 
 	if (ping) {