人脸检测后JavaCV工作/写入BufferdImage

Question

I am successfully detecting faces using JavaCV, it's not totally accurate but good enough for the moment.

However, for testing purposes and with a look at the future (this is only part of a bigger group project), I want to write rectangles onto the faces using BufferedImage and Graphics.drawRect().

I am aware of the fact that you can draw rects to faces using JavaCV with the static methods, but it's not what I need / want to do. If I, after the scanning process, try to load the image using ImageIO and try to write rects to it, the application ends with a native error.

Is there any way I can command openCV to "release" the image (because I think that's the soruce of the problem, that opencv does not release the image file.) ?

Thanks in advance

edit: error code:

# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007fc705dafac4, pid=8216, tid=140493568964352
#
# JRE version: 7.0_21-b02
# Java VM: OpenJDK 64-Bit Server VM (23.7-b01 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C  [libjpeg.so.8+0x1eac4]  jpeg_save_markers+0x84

edit:

 cvReleaseImage(inputImage);
            cvReleaseImage(grayImage);
            cvClearMemStorage(storage);

didnt help too

Answer 1

You can draw simple rectangles without Graphics.drawRect(); Theres a nice way to set pixels of a BufferedImage in java.

try { BufferedImage img = ImageIO.read(new File("img.png")); int x, y; int width, hight; Color color = Color.black; y = 50; x = 50; width = 90; hight = 90; for(int i=x;i<=width;i++){ img.setRGB(i, y, color.getRGB()); img.setRGB(i, hight, color.getRGB()); for(int i=y;i<=hight;i++){ img.setRGB(x, i, color.getRGB()); img.setRGB(width, i, color.getRGB()); } g.drawImage(img, 0, 0, this); } catch (IOException e) { System.err.println("!!!IOException!!!"); }

I hope this will help.

NoName

Answer 2

Check your operating system running , and install 64-bit opencv if your lap is running on 64 bit OS. This link may help you a lot