1. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Distribution of the PSNRs for ROIs using the WCS algorithm. (a) 100 compressed images with a single ROI. (b) 20 compressed images with multiple ROIs. Figure Legend: From: Ad hoc cell-split algorithm of vector quantization with emphasis on regions-of- interest blocks Opt. Eng. 2008;47(3):037006-037006-7. doi:10.1117/1.2899145

2. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Comparison of ROI qualities between traditional VQ and WCS algorithms: (a) code book 256 (traditional VQ); (b) code book 256 (WCS, w=10); (c) code book 1024 (traditional VQ); (d) code book 1024 (WCS, w=10). Figure Legend: From: Ad hoc cell-split algorithm of vector quantization with emphasis on regions-of- interest blocks Opt. Eng. 2008;47(3):037006-037006-7. doi:10.1117/1.2899145

3. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. PSNR of a single ROI using the ACS algorithm on 100 compressed images. Figure Legend: From: Ad hoc cell-split algorithm of vector quantization with emphasis on regions-of- interest blocks Opt. Eng. 2008;47(3):037006-037006-7. doi:10.1117/1.2899145

4. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Comparison between traditional VQ and ACS algorithms on compressed ROI images: (a) 256 code book (traditional VQ); (b) 256 code book (ACS, p=1.00); (c) 1024 code book (traditional VQ); (d) 1024 code book (ACS, p=1.00). Figure Legend: From: Ad hoc cell-split algorithm of vector quantization with emphasis on regions-of- interest blocks Opt. Eng. 2008;47(3):037006-037006-7. doi:10.1117/1.2899145

5. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Comparison of decreased PSNRs of non-ROIs for 100 compressed images with a single face using the WCS algorithm and the ACS algorithm: (a) WCS algorithm; (b) ACS algorithm. Figure Legend: From: Ad hoc cell-split algorithm of vector quantization with emphasis on regions-of- interest blocks Opt. Eng. 2008;47(3):037006-037006-7. doi:10.1117/1.2899145

6. Date of download: 9/17/2016 Copyright © 2016 SPIE. All rights reserved. Comparison of image quality (PSNRs) of traditional VQ, WCS, and ACS. Figure Legend: From: Ad hoc cell-split algorithm of vector quantization with emphasis on regions-of- interest blocks Opt. Eng. 2008;47(3):037006-037006-7. doi:10.1117/1.2899145