Is there a way to convert opencv object (mat object) to blob in javascript?

berak · January 10, 2022, 8:07am

what do you want to do with it ?
would ImageData do the trick ?

you could look at the imshow() code:

opencv/opencv/blob/a1143c4ea02afa7c45c2a1e86be431b81a83bcd1/modules/js/src/helpers.js#L109

    
      
                      break;
                  case cv.CV_8UC3:
                      cv.cvtColor(img, img, cv.COLOR_RGB2RGBA);
                      break;
                  case cv.CV_8UC4:
                      break;
                  default:
                      throw new Error('Bad number of channels (Source image must have 1, 3 or 4 channels)');
                      return;
              }
              var imgData = new ImageData(new Uint8ClampedArray(img.data), img.cols, img.rows);
              var ctx = canvas.getContext('2d');
              ctx.clearRect(0, 0, canvas.width, canvas.height);
              canvas.width = imgData.width;
              canvas.height = imgData.height;
              ctx.putImageData(imgData, 0, 0);
              img.delete();
          };
          
          
Module['VideoCapture'] = function(videoSource) {
              var video = null;

Topic		Replies	Views
Facing some error when converting cv mat to ImageData object in JavaScript opencvjs	5	2304	August 5, 2022
Issue with Unwrapping Blob Data into Float Array After Using blobFromImage Android/Java dnn	3	488	March 27, 2024
OpenCV dnn blob issues C++ dnn	4	560	September 12, 2023
Mat creation from byte buffer noise Android/Java	6	1254	July 27, 2022
How to convert Image RAW10 format to cv::Mat C++ videoio	6	1816	August 16, 2022

Is there a way to convert opencv object (mat object) to blob in javascript?

Related topics