brew qsc6085 camera 一

最近在brew 平台做。遇到一问题,已经量产的手机,由于结构上跟闪光灯隔离不够,导致有些手机拍照之后,会周边泛桔色,卖出去的手机,只可能通过手机软件升级来解决问题。发现把照片的整体红色减少之后,能弱化桔色,所以想到的办法时,在保存图片时,对图片做一些处理。

 

由于相关的代码camera_svcs.c是qualcomm写的,所以提了case 询问了qualcomm,图片的保存格式是:

1. 主图片是YCbCr:420

2. 缩略图是YCbCr:422

YCbCr 其中Y代表亮度,Cb代表蓝色,Cr代表红色

在static void camera_jpeg_encode (qcamrawHeaderType *main_image_header, uint8 *main_image_buffer, qcamrawHeaderType *thumbnail_image_header, uint8 *thumbnail_image_buffer)时做一些处理:

main_image_buffer 是主图片buffer,此处主要是对主图处buffer做处理, thumbnail_image_buffer 是缩略图buffer

 1   if (camera_flash_on) // 如果闪光灯开启的话
 2   {
 3           MSG_HIGH ("==camera_flash_on is true==", 0, 0, 0);   
 4           //0000,0000,0960,1280,0000,-024,0000;
 5            x = 0;
 6            x1 = 960;
 7            y = 0;
 8            y1 = 1280;
 9            ycb = 0;
10            cr = -24;
11            cb = 0;
12            picX = 1280;
13             for ( ; x <= x1 ; ++x)
14             { 
15                 for(ySize = y; ySize <= y1; ++ySize)
16                 {
17                    mainSize = x*(picX-1)+ySize;
18                    if (mainSize > main_image_header->YSize)//Ysize = 1228800
19                    {
20                       mainSize = main_image_header->YSize -1;
21                    }
22                    tmpY = main_image_buffer[mainSize] + ycb;  //对亮度做调整
23                    if (tmpY >255) tmpY = 255;
24                    if (tmpY <0) tmpY = 0;
25                    main_image_buffer[mainSize] = tmpY;
26 ///*=================YCbCr 420===========================
27                    cbCrSize = mainSize /2;
28                    if (cbCrSize > main_image_header->CbCrSize)//CbCrSize = 614400
29                    {
30                       cbCrSize = main_image_header->CbCrSize -1;
31                       MSG_HIGH("---illegality cbCrSize=%d", cbCrSize,0, 0);
32                    }
33                    cbCr = main_image_header->chromaBuffer[cbCrSize];
34 
35                    if (ySize % 2 == 0)
36                    {
37                       if (cb != 0)
38                       {
39                          cbCr = cbCr + cb;
40                          if (cbCr > 255) cbCr =255;
41                          if (cbCr < 0) cbCr =0;
42                       }
43                    }
44                    else
45                    {
46                       if (cr != 0)
47                       {
48                          cbCr = cbCr + cr;
49                          if (cbCr > 255) cbCr =255;
50                          if (cbCr < 0) cbCr =0;
51                       }
52                    }
53                    main_image_header->chromaBuffer[cbCrSize] = cbCr;
54 //============================End==========================*/
55                 }
56             }
57   }

 

 

 

 

posted on 2014-03-13 17:10  舍得0215  阅读(409)  评论(0编辑  收藏  举报