我目前正在做一个项目,用于获取.png/.gif图像,并将其转换为ASCII并将其保存为文本文件。我实现这一点的方法是获得每个像素的灰度平均值,然后使用2个for循环遍历图片的高度和宽度,然后将其添加到一个二维列表中(示例如下)。
假设这是一张50x50的图像:
[Y1,X1,X2,X3,X4,X5...,X50]
[Y2,X1,X2,X3,X4,X5...,X50]
[Y3,X1,X2,X3,X4,X5...,X50]
..。
[Y50,X1,X2,X3,X4,X5...,X50]
然后我使用像这样的小循环将其写入记事本:
for z in range(0, len(yList)):
根据八达通的帮助:
The origin (0, 0) for images is located in the
upper left. For ordinary plots, the origin is located in the lower
left. Octave handles this inversion by plotting the data normally,
and then reversing the direction of the y-axis by setting the
'ydir' property to "reverse&
当从前置摄像头捕获数据时,我总是得到镜像图像,我如何才能获得我在预览窗口中看到的内容。我已经将videoMirrored设置为TRUE。以下是代码片段:
AVCaptureConnection *lConnection = nil;
for ( AVCaptureConnection *connection in [lHandle->m_output connections]) {
for ( AVCaptureInputPort *port in [connection inputPorts] ) {
if ( [[port mediaType] is
这说明了翻转应该是什么,镜子应该是什么。
两种类型镜像的代码:
void mirrorLeftRight()
{
for (int x = 0; x < width/2; x++) {
for (int y = 0; y < height; y++) {
int temp = pixelData[x][y];
pixelData[x][y]=pixelData[width-x][y]
pixelData[width-x][y]=temp;