Other Parts Discussed in Thread: MSP430F5659
Hi,
We are developing a system using 3D TOF sensor.OPT8320 has been chosen for our application.We have interfaced STM32F4 controller to acquire output data from sensor.The controller is presently working at a speed of 180MHz and we are obtaining frames at a rate of 10 frames per second.Actually we are getting a frame rate of 30 frames per second.To view the image obtained ,we are displaying the data which we obtain from sensor through STM by interfacing the controller to MSP430F5659 via SPI.The SPI is working presently at the speed of 20MHz.Hence led to the reduction in the frame rate obtained.we are using a TFT display having pixel ratio of 320 * 240 pixels.
Presently we are trying to display the amplitude data by simply placing an IR Led in front of Optical Sensor without any illumination or modulations schemes implemented.We seem to obtain a circle in the image, displayed on the LCD.The circle seems to entirely black which means all the pixels seems to be saturated.We are presently displaying the amplitude data on screen which we obtained from the (80*60) pixel array from sensor.What could be the possible reason behind this?
Actually we happen to go through training series for time of flight sensing and we noted that ambient light to be the major cause for the pixel saturation.We also read that exposure time should be controlled by controlling the shutter speed.We went through the datasheet but just found a register to configure the shutter enable but couldnt find any to control shutter speed.How should i configure the shutter speed?
i have attached the images of my testing procedures and the view on my LCD screen.Please share your views about this issue.
in the image you can see blue lines when we display the amplitude data.Is it the Noise? If so yes then how should be go about removing the noise from this or reduce this noise levels.
