为了在Selenium下执行视觉测试,我执行了图像比较测试(仅2张图像)。我使用文件大小来查看是否存在差异。但是,没有什么可以告诉我我在哪里有这个差异,我希望能够显示图像上显示的差异。
我正在考虑按颜色而不是尺寸进行比较。这对我来说似乎很复杂,特别是因为我想获得显示差异的图像输出(使用指定区域的裁剪)或提取受该差异影响的像素。您认为在C#中的硒环境下可以做到吗?目前,我尝试了按尺寸。
public static void TestComapre()
{
string imgPath1 = <//PATHNAME >
string imgPath2 = <//PATHNAME >
const int size = 1000;
var len = new FileInfo(imgPath1).Length;
if (len != new FileInfo(imgPath2).Length)
var s1 = File.OpenRead(imgPath1);
var s2 = File.OpenRead(imgPath2);
var buf1 = new byte[size];
var buf2 = new byte[size];
for (int i = 0; i < len / size; i++)
{
s1.Read(buf1, 0, size);
s2.Read(buf2, 0, size);
if (CompareBuffers(buf1, buf2) == false)
Assert.Fail();
}
Assert.True(true);
}
答案 0 :(得分:0)
我在C#中有一个自定义的图像比较器。
它比较2张图像,忽略洋红色像素(您可以将洋红色用作遮罩,以便在比较时忽略区域),并在新图像中将不同像素标记为蓝色
//////////////////////变量///////////////////////// //
private string pathReferenceImg;
private string pathTestImg;
private FileInfo fReferenceFile;
private FileInfo fTestFile;
private Bitmap referenceImage;
private Bitmap testImage;
private int areaToCompareWidth;
private int areaToCompareHeight;
public int xMinAreaToCompare = 0;
public int yMinAreaToCompare = 0;
public int pixelDifferenceQuantity = 0;
public List<Point> differentPixelsList = new List<Point>();
private int[] rgbArrayTestImgWithReferenceImgPink;
private int tolerance = 15;
public bool result = false;
//////////////////////代码///////////////////////// //
public void compareFiles(string pathReferenceImg, string pathTestImg)
{
fReferenceFile = new FileInfo(pathReferenceImg);
fTestFile = new FileInfo(pathTestImg);
referenceImage = new Bitmap(pathReferenceImg);
testImage = new Bitmap(pathTestImg);
areaToCompareWidth = referenceImage.Width;
areaToCompareHeight = referenceImage.Height;
while (xMinAreaToCompare < areaToCompareWidth)
{
Color colorRef = referenceImage.GetPixel(xMinAreaToCompare, yMinAreaToCompare);
Color colorTest = testImage.GetPixel(xMinAreaToCompare, yMinAreaToCompare);
//Magenta = 255R,255B,0G
if (colorRef.ToArgb() != Color.Magenta.ToArgb())
{
if (colorRef != colorTest)
{
pixelDifferenceQuantity++;
differentPixelsList.Add(new Point(xMinAreaToCompare, yMinAreaToCompare));
}
}
yMinAreaToCompare ++;
if (yMinAreaToCompare == areaToCompareHeight)
{
xMinAreaToCompare ++;
yMinAreaToCompare = 1;
}
}
if (pixelDifferenceQuantity >= tolerance)
{
Bitmap resultImage = new Bitmap(testImage);
foreach (Point pixel in differentPixelsList)
{
resultImage.SetPixel(pixel.X, pixel.Y, Color.Blue);
}
resultImage.Save(pathTestImg.Replace("TestFolder", "ResultFolder"));
}
else
{
result = true;
}
}
希望有帮助。