The automatic species ID procedure I'm working on goes through the following steps of image manipulation and decision making to detect Chelonia mydas from a photo. For demonstration I'm using an image contributed by Rachel Ruzgis to the image database of www.seaturtle.org
1. Convert RGB image to Lab color space
2. Threshold 'a' channel of the image with a predefined constant, 100 for this image
3. Fill holes
4. Erode image
5. Mark the blob with maximum area
6. If area of the marked blob is not less than 20% of the image size then declare detection of CM
