The plan is to count all of the trees over the 70 plus acres. Using a two dimensional grayscale image that has been sufficiently blurred (based on the resolution I used), the free image software (ImageJ) provides a good fit when adjusting parameters and finding the two dimensional maximas. I have found greater than 90% agreement between the software derived count and my visual count using several test images. I hope to return now and complete another drone survey of the land with 80% overlap of images. The reason I postponed the final flight was await appropriate weather conditions and to wait until all hardwood trees near the creek bed have lost all of their leaves. Knowing exactly where the hardwood trees are allows me to black that part of the composite image out so that the maxima identified are peak luminance variations based solely on pine tree images. Thanks so much for your question. Tom