Fig. 5

Raw RGB images of ventral and dorsal surfaces of Jatropha curcas seeds based on germination capacity and corresponding reflectance images captured at 940 nm (grayscale and transformed images using nCDA algorithm) and X-ray images. RGB images are represented by three-color channels (red, green and blue) to generate a single-color value for each pixel in the image. In the grayscale and transformed images using nCDA each pixel is represented by a single-value that correspond to reflectance intensity. Higher pixel values in the X-ray images indicate higher tissue density