Update pbr3ed.html

math/pbr3ed.html

@@ -45,6 +45,22 @@ <h5>5.4 Radiometry辐射度学</h5>
                 <p>$$\Phi=\lim\limits_{{\Delta}t \to 0}\frac{{\Delta}Q}{{\Delta}t}=\frac{dQ}{dt}$$</p>
             </div>
         </div>
+        <div>
+            <h4 id="section5">7. Samping and Reconstruction</h4>
+            <div>
+                <h5>5.2.1 XYZ Color</h5>
+                <p>A remarkable property of the human visual system makes it possible to represent colors for human perception with just three floating-point numbers. The tristimulus theory of color perception says that all visible SPDs can be accurately represented for human observers with three values, \( \mathcal{x}_{\lambda} \), , \( \mathcal{y}_{\lambda} \) and \( \mathcal{z}_{\lambda} \). Given an emissive SPD , these values are computed by integrating its product with the spectral matching curves \(X(\lambda)\), \(Y(\lambda)\), and \(Z(\lambda)\): </p>
+            </div>
+            <div>
+                <h5>7.2.1 Evaluating Samping Patterns: Discrepancy</h5>
+                <p>Fourier analysis gave us one way of evaluating the quality of a 2D sampling pattern, but it took us only as far as being able to quantify the improvement from adding more evenly spaced samples in terms of the band-limited frequencies that could be represented</p>
+                <p>Outside of Fourier analysis, mathematicians have developed a concept called discrepancy that can be used to evaluate the quality of a pattern of -dimensional sample positions. </p>
+                <blockquote cite="https://developer.nvidia.com/rtx/dlss">
+                    Nvidia应用深度学习研究副总裁Bryan Catanzaro表示，原生分辨率不再是游戏中实现最大图形保真度的最佳解决方案，游戏图形行业在未来正朝着更加依赖AI图像重建和基于AI的图形渲染的方向发展。
+                </blockquote>
+                <p></p>
+            </div>
+        </div>
     </div>
 </body>
 </html>