Add an image consistency test

extensions/cornerstone/src/services/ViewportService/CornerstoneViewportService.ts

@@ -436,7 +436,6 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
     const orientation = viewportInfo.getOrientation();
     const displayArea = viewportInfo.getDisplayArea();
 
-    console.log('Applying display area', displayArea);
     const viewportInput: Types.PublicViewportInput = {
       viewportId,
       element,

platform/app/cypress/integration/ImageConsistency.spec.js

@@ -0,0 +1,81 @@
+import { utilities } from '@cornerstonejs/core';
+
+/**
+ * Add tests to ensure image consistency and quality
+ */
+
+const testPixel = (dx, dy, expectedPixel) => {
+  cy.get('.cornerstone-canvas').then(v => {
+    const canvas = v[0];
+    cy.log(
+      'testPixel canvas',
+      canvas.width,
+      canvas.height,
+      canvas.style.width,
+      canvas.style.height
+    );
+    const ctx = canvas.getContext('2d');
+    cy.window()
+      .its('cornerstone')
+      .then(cornerstone => {
+        const { viewport } = cornerstone.getEnabledElements()[0];
+        const imageData = viewport.getImageData();
+        // cy.log("imageData", imageData);
+        const origin = viewport.worldToCanvas(imageData.origin);
+        const orX = origin[0] * devicePixelRatio;
+        const orY = origin[1] * devicePixelRatio;
+        const x = Math.floor(orX + dx);
+        const y = Math.floor(orY + dy);
+        cy.log('testPixel origin x,y point x,y', orX, orY, x, y);
+        // cy.log('world origin', imageData.origin);
+        // cy.log('focal', viewport.getCamera().focalPoint,
+        // viewport.worldToCanvas(viewport.getCamera().focalPoint));
+        const pixelData = ctx.getImageData(x, y, 1, 1);
+        expect(pixelData.data[0]).closeTo(expectedPixel, 1);
+      });
+  });
+};
+
+describe('CS3D Image Consistency and Quality', () => {
+  const setupStudySeries = (studyUID, seriesUID) => {
+    cy.checkStudyRouteInViewer(
+      studyUID,
+      `&seriesInstanceUID=${seriesUID}&hangingProtocolId=hpScale`
+    );
+    cy.initCornerstoneToolsAliases();
+    cy.initCommonElementsAliases();
+  };
+
+  it('TG18 Resolution Test Displayed 1:1', () => {
+    setupStudySeries(
+      '2.16.124.113543.6004.101.103.20021117.061159.1',
+      '2.16.124.113543.6004.101.103.20021117.061159.1.004'
+    );
+    testPixel(1018, 1028, 255);
+    // Horizontal and vertical delta from this should not be contaminated
+    // by values from center
+    testPixel(1019, 1028, 0);
+    testPixel(1018, 1029, 0);
+    testPixel(1017, 1028, 0);
+    testPixel(1018, 1027, 0);
+  });
+
+  it('8 bit image displayable', () => {
+    setupStudySeries('1.3.46.670589.17.1.7.1.1.7', '1.3.46.670589.17.1.7.2.1.7');
+
+    // Compare with dcm2jpg generated values or by manually computing WL values
+    testPixel(258, 257, 171);
+    testPixel(259, 257, 166);
+  });
+
+  it('12 bit image displayable and zoom with pixel spacing', () => {
+    setupStudySeries(
+      '1.3.6.1.4.1.25403.345050719074.3824.20170125113417.1',
+      '1.3.6.1.4.1.25403.345050719074.3824.20170125113608.5'
+    );
+
+    // Compare with dcm2jpg generated values or by manually computing WL values
+    testPixel(258, 277, 120);
+    testPixel(259, 277, 122);
+  });
+});