检查图片是否空白图片

最新推荐文章于 2024-01-09 16:04:05 发布

原创最新推荐文章于 2024-01-09 16:04:05 发布 · 2.6k 阅读

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/// <summary>
/// 检查图片是否空白图片
/// </summary>
/// <param name="img">Image</param>
/// <returns>是否空白图片</returns>
private static bool CheckTransparentImg(string fileNamePath)
{
bool blnIsTransparent = false;
//加载位图
System.Drawing.Bitmap bitMap = new System.Drawing.Bitmap(fileNamePath);
//图片总像素
int intAll = bitMap.Height * bitMap.Width;
int intBrightnessCount = 0;
//按像素遍历
for (int intY = 0; intY < bitMap.Height; intY++)
{
for (int intX = 0; intX < bitMap.Width; intX++)
{
System.Drawing.Color color = bitMap.GetPixel(intX, intY);
float dBrightness = color.GetBrightness();
//亮度小于0.2认为不透明
if (dBrightness < 0.2)
{
intBrightnessCount++;
}
}
}
//释放资源
bitMap.Dispose();
//只需要把数量为200以下的,基本能把噪点去掉
if (intBrightnessCount <= 200)
{
blnIsTransparent = true;
}