resizing PixelData of DicomData using EmguCV(C#)-CodePudding

i have issue with cv2.resize as you see in the example below. it seems that i use the api in the wrong way, or i missed some declarations. According to the API, the are InputArray, OutPutArray, which I didn't really understand how to use those. I tried the Cv2.Resize as you can see in my code.

Does anyone have a solution how i can use the cv2.resize correctly??. Thnak you.

DicomFile dicomFile_ = DicomFile.Open(pathOfFileList[0],FileReadOption.ReadAll);
//Read Dicom Dataset

var pixelData_ = dicomFile_.Dataset.GetValues<byte>(DicomTag.PixelData);
//Get Pixel Data for each slice 

Mat outputArray = new Mat();

Cv2.Resize(pixelData_.Length, outputArray, new Size(512,512),0.5,0.5, InterpolationFlags.Area);
//I try to resize the pixelData_, which its resolution 1024 pixels*1024 pixels(rows*columns), but it does not work, it seems that im using the cv2.resize in the wrong way.

var t = outputArray.ToBytes();
//i check if the size of the outputarray, which are 1358 bytes!!

enter image description here

CodePudding user response：

You cannot just input the length of the pixeldata array as the input for resize. You need to create a Mat with the correct size and color depth See Create an Image

If you only need to resize images with a specific color depth (i.e. 16 bit grayscale) I would suggest using the older CV.x 2 Image class. I think this is easier to understand:

var img = new Image<Gray, ushort>(width, height);
img.Bytes = source.Data;
var resizedImage = img.Resize(newWidth, newHeight, Inter.Cubic);
var resizedBytes = resizedImage.Bytes;