Image Compression - Bezier and Splines in Image Processing and Machine Vision - page 100

(a)

(b) (c)

Fig. 4.5. Reconstruction of Lena image: (a) Using surface points; (b) JPEG result
1;(c)JPEGresult2.

that the result of the described algorithm is better than the JPEG result 1
because it has lower MSE and higher PSNR values. The correlation values
are comparable for all the images, which means that all the images are almost
alike. The index FD for the texture measure is the same for all of them, which
means texture in all the images is maintained in the same way (on the average
basis).

4.4.3 Effect of the Increase of Spatial Resolution on Compression
and Quality

For the 8-bit Lena image, some of the researchers have used an image size
of 256

× 256 while some others have used the size of 512 × 512. These two