fix(core): catch unhandled errors during ocr

fixes #166

src/core/ocr/buffer-size-trim.ts

@@ -5,18 +5,30 @@ import { BreachProtocolBufferSizeFragmentResult } from './buffer-size';
 export class BreachProtocolBufferSizeTrimFragment<
   TImage
 > extends BreachProtocolBufferSizeBase<TImage> {
-  override readonly fragment = this.container.processBufferSizeFragment(this.boundingBox);
+  override readonly fragment = this.container.processBufferSizeFragment(
+    this.boundingBox
+  );
 
   // Ensure compatibility with current api.
   async recognize(
     threshold?: number
   ): Promise<BreachProtocolBufferSizeFragmentResult> {
-    const { buffer, width } = await this.container.trim(this.fragment);
+    const { buffer, width } = await this.trimFragment();
     const bufferSize = await this.getBufferSizeFromPixels(width);
 
     return this.getFragmentResult(null, bufferSize, buffer, null);
   }
 
+  private async trimFragment() {
+    try {
+      return await this.container.trim(this.fragment);
+    } catch (e) {
+      const buffer = await this.container.toBuffer(this.fragment);
+
+      return { buffer, width: 0 };
+    }
+  }
+
   private async getBufferSizeFromPixels(width: number) {
     const { innerWidth } = this.boundingBox;
 

src/core/ocr/buffer-size.ts

@@ -82,7 +82,7 @@ export class BreachProtocolBufferSizeFragment<
         // Second control group has some white pixels, threshold is too low.
         start = m + 1;
       }
-    } while (i++ < Math.log2(base) + 1);
+    } while (++i < Math.log2(base));
 
     // No threshold found.
     return base;