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Added clipping area; added buffer for efficient memory-allocations;

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This commit is contained in:
Christoph Oberhofer
2017-03-26 17:30:12 +02:00
parent 4a56fff2cb
commit 22f48ea541
7 changed files with 171 additions and 82 deletions
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src/locator/barcode_locator.js
+31 -20
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@@ -14,6 +14,11 @@ import ImageDebug from '../common/image_debug';
import Rasterizer from './rasterizer';
import Tracer from './tracer';
import skeletonizer from './skeletonizer';
import {DEBUG, log} from '../common/log';
const debug = log.bind(null, DEBUG, "barcode_locator.js");
const vec2 = {
clone: require('gl-vec2/clone'),
dot: require('gl-vec2/dot'),
@@ -563,38 +568,44 @@ export default function createLocator(inputImageWrapper, config) {
}
};
}
export function checkImageConstraints(inputStream, config) {
export function checkImageConstraints({canvasSize, area, patchSize, halfSample: half}) {
var patchSize,
width = inputStream.getWidth(),
height = inputStream.getHeight(),
halfSample = config.halfSample ? 0.5 : 1,
width = canvasSize.width,
height = canvasSize.height,
half = half ? 0.5 : 1,
size,
area;
clipping = {
x: 0,
y: 0,
width,
height,
};
// calculate width and height based on area
if (inputStream.getConfig().area) {
area = computeImageArea(width, height, inputStream.getConfig().area);
inputStream.setTopRight({x: area.sx, y: area.sy});
inputStream.setCanvasSize({x: width, y: height});
width = area.sw;
height = area.sh;
if (area) {
const imageArea = computeImageArea(width, height, area);
clipping.x = imageArea.sx;
clipping.y = imageArea.sy;
clipping.width = width = imageArea.sw;
clipping.height = height = imageArea.sh;
}
size = {
x: Math.floor(width * halfSample),
y: Math.floor(height * halfSample)
x: Math.floor(width * half),
y: Math.floor(height * half)
};
patchSize = calculatePatchSize(config.patchSize, size);
patchSize = calculatePatchSize(patchSize, size);
if (ENV.development) {
console.log("Patch-Size: " + JSON.stringify(patchSize));
debug("Patch-Size: " + JSON.stringify(patchSize));
}
inputStream.setWidth(Math.floor(Math.floor(size.x / patchSize.x) * (1 / halfSample) * patchSize.x));
inputStream.setHeight(Math.floor(Math.floor(size.y / patchSize.y) * (1 / halfSample) * patchSize.y));
clipping.width = Math.floor(Math.floor(size.x / patchSize.x) * (1 / half) * patchSize.x);
clipping.height = Math.floor(Math.floor(size.y / patchSize.y) * (1 / half) * patchSize.y);
clipping.x = Math.floor((canvasSize.width - clipping.width) / 2);
clipping.y = Math.floor((canvasSize.height - clipping.height) / 2);
if ((inputStream.getWidth() % patchSize.x) === 0 && (inputStream.getHeight() % patchSize.y) === 0) {
return true;
if ((clipping.width % patchSize.x) === 0 && (clipping.height % patchSize.y) === 0) {
return clipping;
}
throw new Error("Image dimensions do not comply with the current settings: Width (" +