Image processing considers as powerful tool in recognition of heart tissues in nuclear medicine investigations that increase the percentage and amount of tissues detected. K-means gathering and colour analysis techniques were used in this study. The images treated using MatLab program. Firstly, the images were changed to colour rich space format. Then each pixel in the image was characterized using color analysis algorithms. Then the segment heart tissues were displayed in colour form in discrete new image. The quantitative analysis had done using both precision and recall computation. The results were 99.3+4.57. This method presented capacities cumulative of recognition of the heart tissue with high precision rate.