Sometimes a repetitive image can be met in a report, for example, company logos on the header of each page. If you do not process such duplicates, a report after export will have a large size. Some formats allow exporting only one image and then refer to it from different parts of a document. In Stimulsoft Reports, there is a special class that calculates check sums and searches and processes duplicates. Image processing may slow down the process of exporting, so it is possible to disable this feature. Each export has its own property to enable or disable image comparison. By default this property is always enabled.