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In the attached image I have four Code 128 and two Code 39. I have problem detecting them without down sampling the image first. Since I want to grade the bar codes I don't want to down sample since the code quality is reduced then. I noticed this from that sometimes some of the bar codes are found without down sampling an then the grade is higher for those. Down sampling a factor 2 sometimes work, down sampling a factor 4 always works. I have tried croping the image around the bar code but this doesn't help. I'm using IMAQ Read Barcode 2, and have tried to change the parameter Min Bar Width with no result. Is there any other parameter I can change for the algorithm to find the barcodes, without having to down sample my image. Best regards Karin Hellqvist Certified LabVIEW Architect DVel