diff --git a/datasets/raise/extract_4_color_channel_images_from_raw.py b/datasets/raise/extract_4_color_channel_images_from_raw.py
index 9ed1a88..0c35b5f 100644
--- a/datasets/raise/extract_4_color_channel_images_from_raw.py
+++ b/datasets/raise/extract_4_color_channel_images_from_raw.py
@@ -14,16 +14,19 @@ def getImageFilePath(imageIndex):
 
 def getImageColorChannel(imageIndex, color):
     imageFilePath = getImageFilePath(imageIndex)
-    return getColorChannel(imageFilePath, color)
+    return getColorChannel(imageFilePath, color).astype(np.int32)
 
-colorChannel = getImageColorChannel(IMAGE_INDEX, COLOR)
-print(colorChannel.shape)
+firstColorChannel = getImageColorChannel(IMAGE_INDEX, COLOR)
+secondColorChannel = getImageColorChannel(IMAGE_INDEX + 1, COLOR)
+differenceColorChannel = firstColorChannel - secondColorChannel
+print(differenceColorChannel.shape)
 
 def crop(image, interestingPosition, yRange, xRange):
     return image[interestingPosition[0] - yRange: interestingPosition[0] + yRange, interestingPosition[1] - xRange: interestingPosition[1] + xRange]
 
 #colorChannel = crop(multipleColorsImage, ORIGINAL_INTERESTING_POSITION, Y_RANGE, X_RANGE)
-colorChannel = crop(colorChannel, INTERESTING_POSITION, Y_RANGE, X_RANGE)
-print(colorChannel.shape)
-plt.imshow(colorChannel)
+colorChannelToDisplay = differenceColorChannel
+colorChannelToDisplay = crop(colorChannelToDisplay, INTERESTING_POSITION, Y_RANGE, X_RANGE)
+print(colorChannelToDisplay.shape)
+plt.imshow(colorChannelToDisplay)
 plt.show()
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