FRG圖像文件格式(二):壓縮質量
作者:
[email protected] 2013.06.10
FRG是一種優化從磁盤加載和解碼到顯示需要的時間的圖像文件格式.（更多介紹：http://blog.csdn.net/housisong/article/details/9077059 ）
這裏展示不同壓縮質量參數生成的圖片實際質量,測試圖片包括一些常規測試照片和帶alpha透明通道的圖片;
實際效果展示:
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit)
frg(90 quality)
frg(80 quality)
frg(75 quality)
png : 649,120 Bytes
jpg(100 quality) : 426,651 Bytes
bmp(ARGB32bit) :1,152,054 Bytes
frg(100 quality)(0 size): 809,579 Bytes
frg(100 quality)(50 size): 862,208 Bytes
frg(90 quality)(0 size) : 497,799 Bytes
frg(90 quality)(50 size) : 503,458 Bytes
frg(80 quality)(0 size) : 274,958 Bytes
frg(80 quality)(25 size) : 278,117 Bytes
frg(80 quality)(50 size) : 278,536 Bytes
frg(75 quality)(50 size) : 190,376 Bytes
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit)
frg(90 quality)
frg(80 quality)
frg(75 quality)
png : 704,013 Bytes
jpg(100 quality) : 540,890 Bytes
bmp(ARGB32bit) :1,310,774 Bytes
frg(100 quality)(0 size): 946,307 Bytes
frg(100 quality)(50 size): 987,170 Bytes
frg(90 quality)(0 size) : 585,886 Bytes
frg(90 quality)(50 size) : 590,997 Bytes
frg(80 quality)(0 size) : 307,448 Bytes
frg(80 quality)(25 size) : 308,631 Bytes
frg(80 quality)(50 size) : 310,017 Bytes
frg(75 quality)(50 size) : 204,183 Bytes
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit)
frg(90 quality)
frg(80 quality)
frg(75 quality)
png : 466,938 Bytes
jpg(100 quality) : 282,852 Bytes
bmp(ARGB32bit) :1,152,054 Bytes
frg(100 quality)(0 size): 521,916 Bytes
frg(100 quality)(50 size): 611,415 Bytes
frg(90 quality)(0 size) : 359,627 Bytes
frg(90 quality)(50 size) : 371,025 Bytes
frg(80 quality)(0 size) : 191,324 Bytes
frg(80 quality)(25 size) : 194,350 Bytes
frg(80 quality)(50 size) : 196,376 Bytes
frg(75 quality)(50 size) : 150,897 Bytes
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit)
frg(90 quality)
frg(80 quality)
frg(75 quality)
png : 394,266 Bytes
jpg(100 quality) : 238,127 Bytes
bmp(ARGB32bit) :1,152,054 Bytes
frg(100 quality)(0 size): 515,768 Bytes
frg(100 quality)(50 size): 644,118 Bytes
frg(90 quality)(0 size) : 255,562 Bytes
frg(90 quality)(50 size) : 262,275 Bytes
frg(80 quality)(0 size) : 163,425 Bytes
frg(80 quality)(25 size) : 166,849 Bytes
frg(80 quality)(50 size) : 167,308 Bytes
frg(75 quality)(50 size) : 112,538 Bytes
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit)
frg(90 quality)
frg(80 quality)
frg(75 quality)
file size:
png : 897,554 Bytes
jpg(100 quality) : 425,651 Bytes
bmp(ARGB32bit) :3,145,782 Bytes
frg(100 quality)(0 size):1,557,035 Bytes
frg(100 quality)(50 size):1,852,949 Bytes
frg(90 quality)(0 size) : 649,895 Bytes
frg(90 quality)(50 size) : 660,982 Bytes
frg(80 quality)(0 size) : 463,372 Bytes
frg(80 quality)(25 size) : 470,082 Bytes
frg(80 quality)(50 size) : 470,198 Bytes
frg(75 quality)(50 size) : 268,792 Bytes
帶透明通道的圖片:
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit) frg(90 quality)
frg(80 quality) frg(75 quality)
png : 48,321 Bytes
bmp(ARGB32bit) : 609,934 Bytes
frg(100 quality)(0 size): 74,611 Bytes
frg(100 quality)(50 size): 131,138 Bytes
frg(90 quality)(0 size) : 47,588 Bytes
frg(90 quality)(50 size) : 61,745 Bytes
frg(80 quality)(0 size) : 41,876 Bytes
frg(80 quality)(25 size) : 47,607 Bytes
frg(80 quality)(50 size) : 52,636 Bytes
frg(75 quality)(50 size) : 40,323 Bytes
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit)
frg(90 quality)
frg(80 quality)
frg(75 quality)
png : 309,279 Bytes
bmp(ARGB32bit) :1,406,650 Bytes
frg(100 quality)(0 size): 326,743 Bytes
frg(100 quality)(50 size): 495,925 Bytes
frg(90 quality)(0 size) : 300,649 Bytes
frg(90 quality)(50 size) : 399,434 Bytes
frg(80 quality)(0 size) : 262,599 Bytes
frg(80 quality)(25 size) : 300,890 Bytes
frg(80 quality)(50 size) : 315,332 Bytes
frg(75 quality)(50 size) : 276,114 Bytes
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit) frg(90 quality)
frg(80 quality) frg(75 quality)
png : 67,789 Bytes
bmp(ARGB32bit) : 274,546 Bytes
frg(100 quality)(0 size): 73,611 Bytes
frg(100 quality)(50 size): 93,280 Bytes
frg(90 quality)(0 size) : 61,833 Bytes
frg(90 quality)(50 size) : 74,310 Bytes
frg(80 quality)(0 size) : 41,277 Bytes
frg(80 quality)(25 size) : 43,966 Bytes
frg(80 quality)(50 size) : 45,635 Bytes
frg(75 quality)(50 size) : 39,462 Bytes
frg(100 quality)\png\jpg(100 quality)\bmp(ARGB32bit)
frg(90 quality)
frg(80 quality)
frg(75 quality)
png : 232,325 Bytes
bmp(ARGB32bit) :1,920,054 Bytes
frg(100 quality)(0 size): 364,840 Bytes
frg(100 quality)(50 size): 452,448 Bytes
frg(90 quality)(0 size) : 217,327 Bytes
frg(90 quality)(50 size) : 237,644 Bytes
frg(80 quality)(0 size) : 173,129 Bytes
frg(80 quality)(25 size) : 182,455 Bytes
frg(80 quality)(50 size) : 188,084 Bytes
frg(75 quality)(50 size) : 146,427 Bytes
可以看到frg的質量控制參數降低時,在小範圍過度較強的圖片區域時首先效果變差,這時建議提高質量參數;
在質量控制參數80以下後,frg質量控制較差(當然文件大小也在變小),建議80以下的質量控制參數只用在損失影響不大的圖片或者對文件大小很在意的情景.