def set_pixmap(self, msg, w_img, h_img):
print msg
print [msg]
self._zoom = 0
self.img_width = w_img
self.img_height = h_img
self.qImg = QImage(msg, w_img, h_img, w_img, QImage.Format_Grayscale8)
self._photo = QGraphicsPixmapItem(QPixmap(self.qImg))
self._photo.mousePressEvent = self.pixelSelect
self._scene.addItem(self._photo)

void ImageViewer::setPixmapImage(QByteArray image_data, int image_width, int image_height
{
    zoom = 0;
    qDebug() << image_data;
}

unsigned char data[image_resolution];
qDebug() << data;
memcpy(data, image_data.toStdString().c_str(), image_resolution);
qDebug() << data;
qImg = QImage(data, image_width, image_height, image_width, QImage::Format_Grayscale8);
qDebug() << qImg.byteCount();

unsigned char data[image_resolution];
memcpy(data, image_data.toStdString().c_str(), image_resolution);
qImg = QImage(data, image_width, image_height, image_width, QImage::Format_Grayscale8);
QPixmap pixmap = QPixmap::fromImage(qImg);
QGraphicsPixmapItem * Pix = scene->addPixmap(pixmap);