线程无法调度

发布于 2019-01-28 17:34:53 浏览：1787 订阅该版

6 个回答

天子帝师 2019-01-28

这家伙很懒，什么也没写！

[i=s] 本帖最后由 aozima 于 2019-1-29 00:16 编辑 [/i]

```
void wallner(uint8_t *src, uint8_t *dst)
{
        /*
        * pn = 当前点的灰度值
        * s = 图片宽度/n （n = 8时效果最好）
        * t = 比例阈值
        * 公式：g(n) = g(n-1) * (1-1/s) + p(n)
        */
        uint16_t t = 15;
        uint16_t nr = 120;
        uint16_t nc = 188;
        uint16_t s = nc >> 3;
        const uint8_t S = 9;
        const uint16_t power2S = 1 << S; //加速因子
        uint16_t factor = power2S * (100 - t) / (100 * s);
        /*使用初始值127*s *s是因为 原先算法采用均值也就是fn 是前n个像素之和 
        这次算法优化为与当前点越相邻对其影响越大的思路*/
        uint16_t gn = 127 * s;
        uint16_t q = power2S - power2S / s;
        uint16_t pn, hn;
        uint16_t prev_gn[IMAGEW] = {0}; //前一行各点像素值
        //Mat dst = Mat::zeros(src.size(), CV_8UC1);
        for (uint16_t i = 0; i < nc; i++)
                prev_gn<i> = gn;
        for (uint16_t i = 0; i < nr; i++)
        {
                for (uint16_t j = 0; j < nc; j++) //从左向右遍历
                {
                        pn = src[i * nc + j];
                        gn = ((gn * q) >> S) + pn;
                        hn = (gn + prev_gn[j]) >> 1;
                        prev_gn[j] = gn;
                        if (pn<(hn * factor)>> S)
                                dst[i * nc + j] = 0;
                        else
                                dst[i * nc + j] = 255;
                }
                i++;
                if (i == nr)
                        break;
                //scanline = src.ptr<uint8_t>(i);
                for (int16_t j = nc - 1; j >= 0; j--) //从右向左遍历
                {
                        pn = src[i * nc + j];
                        gn = ((gn * q) >> S) + pn;
                        hn = (gn + prev_gn[j]) >> 1;
                        prev_gn[j] = gn;
                        if (pn<(hn * factor)>> S)
                                dst[i * nc + j] = 0;
                        else
                                dst[i * nc + j] = 255;
                }
        }
}</i>
```