I am using an e-CAM50_CU35x_GSTIX - 5 MP camera module for the gumstix
overo. I'm having trouble with the exposure level of the camera (pictures
are too bright) when I use the maximal resolution (5 Megapixels).
In the camera Manual is written that the function V4L2_CID_EXPOSURE of V4L2
is supported through VIDIOC_QUERYCTRL. I have tried to find a control value
to change the exposure of the sensor but without success. When the function
V4L2_CID_EXPOSURE is by the camera accepted and I change the control value I
always obtain the same picture without exposure control (very bright). No
matter which value I set, the picture has not changed.
Could someone in the community tell me if there a way to change the exposure
value of the camera? Here is the software I tried to apply for the case:
queryctrl.id = V4L2_CID_EXPOSURE;
if (-1 == xioctl(fd, VIDIOC_QUERYCTRL, &queryctrl))
if(errno != EINVAL)
printf("V4L2_CID_EXPOSURE is not supported\n");
else if (queryctrl.flags &V4L2_CTRL_FLAG_DISABLED)
printf("V4L2_CID_EXPOSURE is not supported_2\n");
printf("exp. Value %d \n",control.value);
if (-1 == xioctl(fd, VIDIOC_S_CTRL, &control))
Thank you in advance,
View this message in context: http://gumstix.8.x6.nabble.com/Exposure-function-using-E-Con-System-Cameras-with-Gumstix-Overo-tp4967210.html
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