diff --git a/README.md b/README.md
index 60d6c17..af0571b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# bimg [![Build Status](https://travis-ci.org/h2non/bimg.png)](https://travis-ci.org/h2non/bimg) [![GitHub release](http://img.shields.io/github/tag/h2non/bimg.svg?style=flat-square)](https://github.com/h2non/bimg/releases) [![GoDoc](https://godoc.org/github.com/h2non/bimg?status.svg)](https://godoc.org/github.com/h2non/bimg)
+# bimg [![Build Status](https://travis-ci.org/h2non/bimg.png)](https://travis-ci.org/h2non/bimg) [![GoDoc](https://godoc.org/github.com/h2non/bimg?status.svg)](https://godoc.org/github.com/h2non/bimg) [![Go Report Card](http://goreportcard.com/badge/h2non/bimg)](http://goreportcard.com/report/h2non/bimg)
 
 Small [Go](http://golang.org) package for fast high-level image processing using [libvips](https://github.com/jcupitt/libvips) via C bindings, providing a simple, elegant and fluent [programmatic API](#examples).
 
@@ -297,6 +297,21 @@ Enable libvips traces (note that a lot of data will be written in stdout):
 VIPS_TRACE=1 ./app 
 ```
 
+You can also dump a core on failure, as [John Cuppit](https://github.com/jcupitt) said: 
+```c
+g_log_set_always_fatal(
+                G_LOG_FLAG_RECURSION |
+                G_LOG_FLAG_FATAL |
+                G_LOG_LEVEL_ERROR |
+                G_LOG_LEVEL_CRITICAL |
+                G_LOG_LEVEL_WARNING );
+```
+
+Or set the G_DEBUG environment variable:
+```
+export G_DEBUG=fatal-warnings,fatal-criticals
+```
+
 ## API 
 
 See [godoc reference](https://godoc.org/github.com/h2non/bimg) for detailed API documentation.
diff --git a/fixtures/vertical.jpg b/fixtures/vertical.jpg
new file mode 100644
index 0000000..3e12e65
Binary files /dev/null and b/fixtures/vertical.jpg differ
diff --git a/image.go b/image.go
index 6b6e179..fae447e 100644
--- a/image.go
+++ b/image.go
@@ -1,5 +1,6 @@
 package bimg
 
+// Image encapsulates the whole image buffer
 type Image struct {
 	buffer []byte
 }
diff --git a/metadata.go b/metadata.go
index c1e311a..9be6dac 100644
--- a/metadata.go
+++ b/metadata.go
@@ -6,11 +6,13 @@ package bimg
 */
 import "C"
 
+// ImageSize represents the image width and height values
 type ImageSize struct {
 	Width  int
 	Height int
 }
 
+// ImageMedatada represents the basic metadata fields
 type ImageMetadata struct {
 	Orientation int
 	Channels    int
diff --git a/resize_test.go b/resize_test.go
index d57852c..7b4759a 100644
--- a/resize_test.go
+++ b/resize_test.go
@@ -4,6 +4,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path"
+	"strconv"
 	"testing"
 )
 
@@ -28,27 +29,70 @@ func TestResize(t *testing.T) {
 	Write("fixtures/test_out.jpg", newImg)
 }
 
+func TestResizeVerticalImage(t *testing.T) {
+	tests := []struct {
+		format  ImageType
+		options Options
+	}{
+		{JPEG, Options{Width: 800, Height: 600}},
+		{JPEG, Options{Width: 1000, Height: 1000}},
+		{JPEG, Options{Width: 1000, Height: 1500}},
+		{JPEG, Options{Width: 1000}},
+		{JPEG, Options{Height: 1500}},
+		{JPEG, Options{Width: 100, Height: 50}},
+		{JPEG, Options{Width: 2000, Height: 2000}},
+		{JPEG, Options{Width: 500, Height: 1000}},
+		{JPEG, Options{Width: 500}},
+		{JPEG, Options{Height: 500}},
+		{JPEG, Options{Crop: true, Width: 500, Height: 1000}},
+		{JPEG, Options{Crop: true, Enlarge: true, Width: 2000, Height: 1400}},
+		{JPEG, Options{Enlarge: true, Force: true, Width: 2000, Height: 2000}},
+		{JPEG, Options{Force: true, Width: 2000, Height: 2000}},
+	}
+
+	buf, _ := Read("fixtures/vertical.jpg")
+	for _, test := range tests {
+		image, err := Resize(buf, test.options)
+		if err != nil {
+			t.Errorf("Resize(imgData, %#v) error: %#v", test.options, err)
+		}
+
+		if DetermineImageType(image) != test.format {
+			t.Fatal("Image format is invalid. Expected: %s", test.format)
+		}
+
+		size, _ := Size(image)
+		if test.options.Height > 0 && size.Height != test.options.Height {
+			t.Fatalf("Invalid height: %d", size.Height)
+		}
+		if test.options.Width > 0 && size.Width != test.options.Width {
+			t.Fatalf("Invalid width: %d", size.Width)
+		}
+
+		Write("fixtures/test_vertical_"+strconv.Itoa(test.options.Width)+"x"+strconv.Itoa(test.options.Height)+".jpg", image)
+	}
+}
+
 func TestResizeCustomSizes(t *testing.T) {
 	tests := []struct {
-		file    string
 		format  ImageType
 		options Options
 	}{
-		{"test.jpg", JPEG, Options{Width: 800, Height: 600}},
-		{"test.jpg", JPEG, Options{Width: 1000, Height: 1000}},
-		{"test.jpg", JPEG, Options{Width: 100, Height: 50}},
-		{"test.jpg", JPEG, Options{Width: 2000, Height: 2000}},
-		{"test.jpg", JPEG, Options{Width: 500, Height: 1000}},
-		{"test.jpg", JPEG, Options{Width: 500}},
-		{"test.jpg", JPEG, Options{Height: 500}},
-		{"test.jpg", JPEG, Options{Crop: true, Width: 500, Height: 1000}},
-		{"test.jpg", JPEG, Options{Crop: true, Enlarge: true, Width: 2000, Height: 1400}},
-		{"test.jpg", JPEG, Options{Enlarge: true, Force: true, Width: 2000, Height: 2000}},
-		{"test.jpg", JPEG, Options{Force: true, Width: 2000, Height: 2000}},
+		{JPEG, Options{Width: 800, Height: 600}},
+		{JPEG, Options{Width: 1000, Height: 1000}},
+		{JPEG, Options{Width: 100, Height: 50}},
+		{JPEG, Options{Width: 2000, Height: 2000}},
+		{JPEG, Options{Width: 500, Height: 1000}},
+		{JPEG, Options{Width: 500}},
+		{JPEG, Options{Height: 500}},
+		{JPEG, Options{Crop: true, Width: 500, Height: 1000}},
+		{JPEG, Options{Crop: true, Enlarge: true, Width: 2000, Height: 1400}},
+		{JPEG, Options{Enlarge: true, Force: true, Width: 2000, Height: 2000}},
+		{JPEG, Options{Force: true, Width: 2000, Height: 2000}},
 	}
 
+	buf, _ := Read("fixtures/test.jpg")
 	for _, test := range tests {
-		buf, _ := Read("fixtures/" + test.file)
 		image, err := Resize(buf, test.options)
 		if err != nil {
 			t.Errorf("Resize(imgData, %#v) error: %#v", test.options, err)