Magick.NET version

13.3.3

Environment (Operating system, version and so on)

Windows10, net framework 4.7.2

Description

CannelCount=2, but Cannels.Count=1 when load a gray jpg ?

it is jpg image
img.zip

Steps to Reproduce

byte[] picbyte = File.ReadAllBytes(fullpath);
using (MagickImage magickimage = new MagickImage(picbyte, settings))

settings as follow :

var settings = new MagickReadSettings
{
// #1077
SyncImageWithExifProfile = true,
SyncImageWithTiffProperties = true,
};
if (extname.Equals(".SVG", StringComparison.OrdinalIgnoreCase))
{
settings.BackgroundColor = MagickColors.Transparent;
settings.SetDefine("svg:xml-parse-huge", "true");
}
else if (extname.Equals(".HEIC", StringComparison.OrdinalIgnoreCase) ||
extname.Equals(".HEIF", StringComparison.OrdinalIgnoreCase))
{
settings.SetDefines(new HeicReadDefines
{
PreserveOrientation = true,
DepthImage = true,
});
}
else if (extname.Equals(".JP2", StringComparison.OrdinalIgnoreCase))
{
settings.SetDefines(new Jp2ReadDefines
{
QualityLayers = 100,
});
}
else if (extname.Equals(".TIF", StringComparison.OrdinalIgnoreCase) ||
extname.Equals(".TIFF", StringComparison.OrdinalIgnoreCase))
{
settings.SetDefines(new TiffReadDefines
{
IgnoreTags = new[] {
// Issue d2phap/ImageGlass#1454
"34022", // ColorTable
"34025", // ImageColorValue
"34026", // BackgroundColorValue

// Issue https://github.com/d2phap/ImageGlass/issues/1181
"32928",

// Issue https://github.com/d2phap/ImageGlass/issues/1583
"32932", // Wang Annotation
// Issue https://github.com/d2phap/ImageGlass/issues/1617
"34031", // TrapIndicator

},
});
}

// Fixed #708: length and filesize do not match
settings.SetDefines(new BmpReadDefines
{
IgnoreFileSize = true,
});

// Fix RAW color
settings.SetDefines(new DngReadDefines()
{
UseCameraWhitebalance = true,
OutputColor = DngOutputColor.SRGB,
ReadThumbnail = true,
});