Plot Points over an image

*To*: mathgroup at smc.vnet.net*Subject*: [mg129158] Plot Points over an image*From*: lopez.matencio at gmail.com*Date*: Tue, 18 Dec 2012 02:41:53 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net

Hello, I have a TIFF image of 640x640 pixels, over which I would like to plot a list of points or disks with small radius. I have been testing different alternatives and I found ImageCompose command. ImageCompose[image, {Graphics[{PointSize[.009], Black, Point[{0, 0}]} ], .6}, {600, 600}] This place a point at pixels {600,600} from left-bottom, but if I set a point close to e.g. right edge of the image {635,600} the point is into the frame bat there is not image at background. Namely, the image does not show all the pixels. First, let say 20-25 first x-pixels of the image, and the last 20-25 x-pixels of the image are invisibles. When I tick the image it shows the image at the center of the frame and two blank vertical spaces at right and left of the image. Two questions: - There exist any option or command I could use to show the full image, i.e. the 640 x 640 pixels? - How could I display over imposed a list of points (e.g. 40 points) at pixel coordinates and all on the same image. Thank you very much for your help and time. Pablo