CNN-based Density Estimation and Crowd Counting

What is crowd counting?? Crowd Counting is a technique to count or estimate the number of people in an image. We can use a direct method to count the number of people in an image. But it is nearly impossible in the high dense crowded areas. We do not have an algorithm or method to calculate exact the number of people in the crowd image yet. Most computer vision techniques give the approximate number of the crowd count for an image.