If there is no image on display monitor, first ensure that the adjustment for brightness and contrast are properly set.
如果显示器没有图像显示，首先确保正确设置亮度和对比度的调节进行正确的设置。
2
The video processor directs each electrode to transmit signals representing an object's contours, brightness and contrast, which pulse along optic neurons into the brain.
The effects supported include desaturation and grayscale, inverting, flipping, brightness and contrast adjustment, hue and saturation, embossing, blurring and much more.