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#315 made sure that with a small capture the canvas is enlarged so OCR can still work.

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Robin Krom 2021-05-26 12:04:20 +02:00
commit fa0ed4a53b
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1 changed files with 36 additions and 1 deletions
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37
src/Greenshot.Plugin.Win10/Win10OcrProvider.cs
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@ -27,6 +27,8 @@ using Windows.Graphics.Imaging;
using Windows.Media.Ocr;
using Windows.Storage.Streams;
using Greenshot.Base.Core;
using Greenshot.Base.Core.Enums;
using Greenshot.Base.Effects;
using Greenshot.Base.Interfaces;
using Greenshot.Base.Interfaces.Ocr;
using Greenshot.Base.Interfaces.Plugin;
@ -39,6 +41,8 @@ namespace Greenshot.Plugin.Win10
public class Win10OcrProvider : IOcrProvider
{
private static readonly log4net.ILog Log = log4net.LogManager.GetLogger(typeof(Win10OcrProvider));
private const int MinWidth = 130;
private const int MinHeight = 130;
/// <summary>
/// Constructor, this is only debug information
@ -62,7 +66,38 @@ namespace Greenshot.Plugin.Win10
OcrInformation result;
using (var imageStream = new MemoryStream())
{
ImageOutput.SaveToStream(surface, imageStream, new SurfaceOutputSettings());
// We only want the background
var outputSettings = new SurfaceOutputSettings(OutputFormat.png, 0, true)
{
ReduceColors = true,
SaveBackgroundOnly = true
};
// Force Grayscale output
outputSettings.Effects.Add(new GrayscaleEffect());
if (surface.Image.Width < MinWidth || surface.Image.Height < MinHeight)
{
int addedWidth = MinWidth - surface.Image.Width;
if (addedWidth < 0)
{
addedWidth = 0;
}
else
{
addedWidth /= 2;
}
int addedHeight = MinHeight - surface.Image.Height;
if (addedHeight < 0)
{
addedHeight = 0;
}
else
{
addedHeight /= 2;
}
IEffect effect = new ResizeCanvasEffect(addedWidth, addedWidth, addedHeight, addedHeight);
outputSettings.Effects.Add(effect);
}
ImageOutput.SaveToStream(surface, imageStream, outputSettings);
imageStream.Position = 0;
var randomAccessStream = imageStream.AsRandomAccessStream();