我正在嘗試使用J/Link將圖像從Mathematica轉換爲Java。我能夠將圖像打印在數學這樣的:在Java中獲取Mathematica圖像
Print[ Graphics[Raster[ img[[1]] ], AspectRatio->Automatic, ImageSize->530 ] ];
我試着從數學函數以不同的方式返回數據:
Return [ Image[Graphics[Raster[ img[[1]] ], AspectRatio->Automatic, ImageSize->530 ]] ];
Return [ Graphics[Raster[ img[[1]] ], AspectRatio->Automatic, ImageSize->530 ] ];
Return [ Raster[ note1[[1]] ] ];
Return [ note1[[1]] ];
我的Java代碼:
ml.evaluate("tmp = renderImageGeneric[" + sampleId + ", noteText," + sizeX + "," + sizeY + ", margin," + dpi + "," + lineStep + "," + tabStep + "," + ligatureMatch + "," + maxLigHeightDiff + "," + mmSearch + "," + highToLowGap + "," + lowToHighGap + "," + wordBaselineVariance + "," + debugFlag + "]");
ml.discardAnswer();
byte[] res = ml.evaluateToImage("tmp", 0, 0);
ByteArrayInputStream strm = new ByteArrayInputStream(res);
BufferedImage imag = ImageIO.read(strm);
//BufferedImage imag = ImageIO.read(new InputStream(res));
if(imag != null) {
ImageIO.write(imag, "png", new File("/Users/Rebecca/","test.png"));
}else {
System.out.println("image is null");
}
調試時,我在res中得到一個很大的字節數組。圖像確實被保存,但是它是空白的(即白色圖像)。
如果我只返回一個字符串(「藍色」),則會保存一個帶有藍色字符串的圖像。
我假設我需要在renderImageGeneric中返回不同的東西,但我無法弄清楚什麼。
謝謝!
這也沒有工作。我不確定發生了什麼,但JLink似乎並沒有正確評估函數的返回值。 – rmw 2011-02-28 19:34:57