diff --git a/pdf/contentstream/processor.go b/pdf/contentstream/processor.go
index 50f0a25a..550702c7 100644
--- a/pdf/contentstream/processor.go
+++ b/pdf/contentstream/processor.go
@@ -127,7 +127,7 @@ func (csp *ContentStreamProcessor) getColorspace(name string, resources *PdfPage
 	}
 
 	// Otherwise unsupported.
-	common.Log.Debug("Unknown colorspace requested: %s", name)
+	common.Log.Error("Unknown colorspace requested: %s", name)
 	return nil, errors.New("Unsupported colorspace")
 }
 
@@ -140,6 +140,10 @@ func (csp *ContentStreamProcessor) getInitialColor(cs PdfColorspace) (PdfColor,
 		return NewPdfColorDeviceRGB(0.0, 0.0, 0.0), nil
 	case *PdfColorspaceDeviceCMYK:
 		return NewPdfColorDeviceCMYK(0.0, 0.0, 0.0, 1.0), nil
+	case *PdfColorspaceCalGray:
+		return NewPdfColorCalGray(0.0), nil
+	case *PdfColorspaceCalRGB:
+		return NewPdfColorCalRGB(0.0, 0.0, 0.0), nil
 	case *PdfColorspaceLab:
 		l := 0.0
 		a := 0.0
@@ -190,7 +194,7 @@ func (csp *ContentStreamProcessor) getInitialColor(cs PdfColorspace) (PdfColor,
 		return nil, nil
 	}
 
-	common.Log.Debug("Unable to determine initial color for unknown colorspace: %T", cs)
+	common.Log.Error("Unable to determine initial color for unknown colorspace: %T", cs)
 	return nil, errors.New("Unsupported colorspace")
 }
 
@@ -364,8 +368,8 @@ func (this *ContentStreamProcessor) handleCommand_SC(op *ContentStreamOperation,
 
 	cs := this.graphicsState.ColorspaceStroking
 	if len(op.Params) != cs.GetNumComponents() {
-		common.Log.Debug("Invalid number of parameters for SC")
-		common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+		common.Log.Error("Invalid number of parameters for SC")
+		common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 		return errors.New("Invalid number of parameters")
 	}
 
@@ -389,8 +393,8 @@ func (this *ContentStreamProcessor) handleCommand_SCN(op *ContentStreamOperation
 
 	if !isPatternCS(cs) {
 		if len(op.Params) != cs.GetNumComponents() {
-			common.Log.Debug("Invalid number of parameters for SC")
-			common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+			common.Log.Error("Invalid number of parameters for SC")
+			common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 			return errors.New("Invalid number of parameters")
 		}
 	}
@@ -411,8 +415,8 @@ func (this *ContentStreamProcessor) handleCommand_sc(op *ContentStreamOperation,
 
 	if !isPatternCS(cs) {
 		if len(op.Params) != cs.GetNumComponents() {
-			common.Log.Debug("Invalid number of parameters for SC")
-			common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+			common.Log.Error("Invalid number of parameters for SC")
+			common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 			return errors.New("Invalid number of parameters")
 		}
 	}
@@ -433,8 +437,8 @@ func (this *ContentStreamProcessor) handleCommand_scn(op *ContentStreamOperation
 
 	if !isPatternCS(cs) {
 		if len(op.Params) != cs.GetNumComponents() {
-			common.Log.Debug("Invalid number of parameters for SC")
-			common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+			common.Log.Error("Invalid number of parameters for SC")
+			common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 			return errors.New("Invalid number of parameters")
 		}
 	}
@@ -454,8 +458,8 @@ func (this *ContentStreamProcessor) handleCommand_scn(op *ContentStreamOperation
 func (this *ContentStreamProcessor) handleCommand_G(op *ContentStreamOperation, resources *PdfPageResources) error {
 	cs := NewPdfColorspaceDeviceGray()
 	if len(op.Params) != cs.GetNumComponents() {
-		common.Log.Debug("Invalid number of parameters for SC")
-		common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+		common.Log.Error("Invalid number of parameters for SC")
+		common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 		return errors.New("Invalid number of parameters")
 	}
 
@@ -475,8 +479,8 @@ func (this *ContentStreamProcessor) handleCommand_G(op *ContentStreamOperation,
 func (this *ContentStreamProcessor) handleCommand_g(op *ContentStreamOperation, resources *PdfPageResources) error {
 	cs := NewPdfColorspaceDeviceGray()
 	if len(op.Params) != cs.GetNumComponents() {
-		common.Log.Debug("Invalid number of parameters for SC")
-		common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+		common.Log.Error("Invalid number of parameters for SC")
+		common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 		return errors.New("Invalid number of parameters")
 	}
 
@@ -496,8 +500,8 @@ func (this *ContentStreamProcessor) handleCommand_g(op *ContentStreamOperation,
 func (this *ContentStreamProcessor) handleCommand_RG(op *ContentStreamOperation, resources *PdfPageResources) error {
 	cs := NewPdfColorspaceDeviceRGB()
 	if len(op.Params) != cs.GetNumComponents() {
-		common.Log.Debug("Invalid number of parameters for SC")
-		common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+		common.Log.Error("Invalid number of parameters for SC")
+		common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 		return errors.New("Invalid number of parameters")
 	}
 
@@ -516,8 +520,8 @@ func (this *ContentStreamProcessor) handleCommand_RG(op *ContentStreamOperation,
 func (this *ContentStreamProcessor) handleCommand_rg(op *ContentStreamOperation, resources *PdfPageResources) error {
 	cs := NewPdfColorspaceDeviceRGB()
 	if len(op.Params) != cs.GetNumComponents() {
-		common.Log.Debug("Invalid number of parameters for SC")
-		common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+		common.Log.Error("Invalid number of parameters for SC")
+		common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 		return errors.New("Invalid number of parameters")
 	}
 
@@ -537,8 +541,8 @@ func (this *ContentStreamProcessor) handleCommand_rg(op *ContentStreamOperation,
 func (this *ContentStreamProcessor) handleCommand_K(op *ContentStreamOperation, resources *PdfPageResources) error {
 	cs := NewPdfColorspaceDeviceCMYK()
 	if len(op.Params) != cs.GetNumComponents() {
-		common.Log.Debug("Invalid number of parameters for SC")
-		common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+		common.Log.Error("Invalid number of parameters for SC")
+		common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 		return errors.New("Invalid number of parameters")
 	}
 
@@ -557,8 +561,8 @@ func (this *ContentStreamProcessor) handleCommand_K(op *ContentStreamOperation,
 func (this *ContentStreamProcessor) handleCommand_k(op *ContentStreamOperation, resources *PdfPageResources) error {
 	cs := NewPdfColorspaceDeviceCMYK()
 	if len(op.Params) != cs.GetNumComponents() {
-		common.Log.Debug("Invalid number of parameters for SC")
-		common.Log.Debug("Number %d not matching colorspace %T", len(op.Params), cs)
+		common.Log.Error("Invalid number of parameters for SC")
+		common.Log.Error("Number %d not matching colorspace %T", len(op.Params), cs)
 		return errors.New("Invalid number of parameters")
 	}
 
diff --git a/pdf/model/colorspace.go b/pdf/model/colorspace.go
index ef1bbb05..f4a6572f 100644
--- a/pdf/model/colorspace.go
+++ b/pdf/model/colorspace.go
@@ -354,6 +354,7 @@ func (this *PdfColorspaceDeviceRGB) ImageToRGB(img Image) (Image, error) {
 }
 
 func (this *PdfColorspaceDeviceRGB) ImageToGray(img Image) (Image, error) {
+
 	grayImage := img
 
 	samples := img.GetSamples()
@@ -374,7 +375,9 @@ func (this *PdfColorspaceDeviceRGB) ImageToGray(img Image) (Image, error) {
 
 		// Convert to uint32
 		val := uint32(grayValue * maxVal)
+
 		graySamples = append(graySamples, val)
+
 	}
 	grayImage.SetSamples(graySamples)
 	grayImage.ColorComponents = 1
@@ -893,7 +896,7 @@ func (this *PdfColorspaceCalRGB) String() string {
 }
 
 func (this *PdfColorspaceCalRGB) GetNumComponents() int {
-	return 1
+	return 3
 }
 
 func newPdfColorspaceCalRGBFromPdfObject(obj PdfObject) (*PdfColorspaceCalRGB, error) {
@@ -1119,7 +1122,7 @@ func (this *PdfColorspaceCalRGB) ImageToRGB(img Image) (Image, error) {
 	maxVal := math.Pow(2, float64(img.BitsPerComponent)) - 1
 
 	rgbSamples := []uint32{}
-	for i := 0; i < len(samples); i++ {
+	for i := 0; i < len(samples)-2; i++ {
 		// A, B, C in range 0.0 to 1.0
 		aVal := float64(samples[i]) / maxVal
 		bVal := float64(samples[i+1]) / maxVal
@@ -1916,6 +1919,7 @@ func (this *PdfColorspaceSpecialPattern) ColorFromFloats(vals []float64) (PdfCol
 // the name of the pattern.
 func (this *PdfColorspaceSpecialPattern) ColorFromPdfObjects(objects []PdfObject) (PdfColor, error) {
 	if len(objects) < 1 {
+		common.Log.Error("ColorFromPdfObjects: len(objects)=%d", len(objects))
 		return nil, errors.New("Invalid number of parameters")
 	}
 	patternColor := &PdfColorPattern{}