我根据给定图像的注视区域创建热图。我可以创建热图并将其作为新文件保存到我的桌面。但我想创建另一个图像,它由热图和注视的图像组成,用于收集眼动追踪数据。我希望原始图片是纯色背景,然后将热图重叠(或覆盖我不知道)透明,并将它们合并到一个新文件中。有没有办法在c#中做到这一点? 谢谢
答案 0 :(得分:0)
好的,我找到了答案,
首先我调整背景图片
public static Bitmap ResizeImage(Bitmap image, int width, int height)
{
var destRect = new Rectangle(0, 0, width, height);
var destImage = new Bitmap(width, height);
destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
using (var graphics = Graphics.FromImage(destImage))
{
graphics.CompositingMode = CompositingMode.SourceCopy;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
using (var wrapMode = new ImageAttributes())
{
wrapMode.SetWrapMode(WrapMode.TileFlipXY);
graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
}
}
return destImage;
}
之后,必须将热图设置为另一个不透明度级别,以使背景可见
public static Image SetImageOpacity(Image image, float opacity)
{
try
{
//create a Bitmap the size of the image provided
Bitmap bmp = new Bitmap(image.Width, image.Height);
//create a graphics object from the image
using (Graphics gfx = Graphics.FromImage(bmp))
{
//create a color matrix object
ColorMatrix matrix = new ColorMatrix();
//set the opacity
matrix.Matrix33 = opacity;
//create image attributes
ImageAttributes attributes = new ImageAttributes();
//set the color(opacity) of the image
attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
//now draw the image
gfx.DrawImage(image, new Rectangle(0, 0, bmp.Width, bmp.Height), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attributes);
}
return bmp;
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message);
throw ex;
//return null;
}
}
最后我们需要合并这两个
public static Image Overlap(Image source1, Image source2)
{
var target = new Bitmap(source1.Width, source1.Height, PixelFormat.Format32bppArgb);
var graphics = Graphics.FromImage(target);
graphics.CompositingMode = CompositingMode.SourceOver; // this is the default, but just to be clear
graphics.DrawImage(source1, 0, 0);
graphics.DrawImage(source2, 0, 0);
return target;
}
这是我的背景: original RTE
这里是合并版本,带有眼球跟踪数据的热图 RTE + heatmap