Introduction - If you have any usage issues, please Google them yourself
ch2_1_1: Show histogram (§ 2.1.3) ch2_2_1: display images (§ 2.2.2) ch2_3_1: Add color section (§ 2.3.1) ch2_3_2: single-frame images show (§ 2.3.2) ch2_3_3: multi-image frames show (§ 2.3.2) ch2_3_4: Image Animation (§ 2.3.2) ch2_3_5: gray-scale image of the animation show (§ 2.3.2) ch2_3_6: Texture Mapping (§ 2.3.3) ch2_3_7: a graphical window At the same time show the two images (§ 2.3.4)