Increase cumulative chart resolution

app.py

@@ -651,7 +651,11 @@ def make_charts(
     The codec curve rises in bursts where saliency is high; the uniform
     baseline rises in equal steps because every sampled full frame
     contributes `patch_size^2` patches."""
-    fig, ax = plt.subplots(figsize=(9.2, 3.6), constrained_layout=True)
+    # Use a larger physical canvas plus high DPI so Gradio/HF does not
+    # upscale a small rasterized plot into a blurry chart.
+    fig, ax = plt.subplots(
+        figsize=(11.4, 4.8), dpi=220, constrained_layout=True,
+    )
 
     fps_safe = float(fps) if fps and fps > 0 else 25.0
     if grids:
@@ -726,10 +730,10 @@ def make_charts(
         )
 
     ax.fill_between(xx_c, yy_c, step=None, alpha=0.12, color="#4f46e5")
-    ax.plot(xx_c, yy_c, color="#4f46e5", linewidth=2.2, label=codec_lbl)
+    ax.plot(xx_c, yy_c, color="#4f46e5", linewidth=2.8, label=codec_lbl)
     ax.fill_between(xx_u, yy_u, step=None, alpha=0.10, color="#06b6d4")
     ax.plot(
-        xx_u, yy_u, color="#06b6d4", linewidth=2.2, linestyle="--",
+        xx_u, yy_u, color="#06b6d4", linewidth=2.8, linestyle="--",
         label=uni_lbl,
     )
 
@@ -739,7 +743,7 @@ def make_charts(
     ax.text(
         duration * 0.995, budget * 1.015,
         f"budget {budget:,}", color="#475569",
-        fontsize=8.5, va="bottom", ha="right",
+        fontsize=10.0, va="bottom", ha="right",
     )
 
     # Group boundaries
@@ -751,7 +755,7 @@ def make_charts(
                 bx = times[end_idx]
             ax.axvline(
                 bx, color="#cbd5e1", linestyle=(0, (3, 3)),
-                alpha=0.55, linewidth=0.8,
+                alpha=0.55, linewidth=1.0,
             )
 
     n_groups = len(groups) if groups else 1
@@ -759,17 +763,17 @@ def make_charts(
     ax.set_title(
         f"Cumulative patches selected over time · {saliency_signal} · "
         f"{gop_str} ({n_groups} groups)",
-        fontsize=11, color="#1e293b",
+        fontsize=13, color="#1e293b",
     )
-    ax.set_xlabel("time (s)", fontsize=9.5)
-    ax.set_ylabel("# patches selected (cumulative)", fontsize=9.5)
+    ax.set_xlabel("time (s)", fontsize=11)
+    ax.set_ylabel("# patches selected (cumulative)", fontsize=11)
     ax.set_xlim(-duration * 0.02, duration * 1.02)
     ymax = max(budget, codec_total, uni_total) * 1.08 + 1
     ax.set_ylim(0, ymax)
-    ax.tick_params(axis="both", labelsize=8.5)
+    ax.tick_params(axis="both", labelsize=10)
     ax.grid(True, alpha=0.25, linestyle="--", axis="y")
     ax.spines[["top", "right"]].set_visible(False)
-    ax.legend(loc="upper left", fontsize=9, frameon=False)
+    ax.legend(loc="upper left", fontsize=10, frameon=False, handlelength=2.8)
 
     fig.patch.set_facecolor("white")
     return fig