Changed defaults back to use TIF. Corrected spelling

api.php

@@ -85,7 +85,7 @@ public static function HandleScanRequest($request) {
 			$scanRequest->contrast = (int)$clientRequest->contrast;
 		}
 
-		$outputfile = Config::OutputDirectory."Scan_".date("Y-m-d H.i.s",time()).".".Config::OutputExtention ;
+		$outputfile = Config::OutputDirectory."Scan_".date("Y-m-d H.i.s",time()).".".Config::OutputExtension ;
 		$scanRequest->outputFilepath = $outputfile;
 		$scanRequest->outputFilter = Config::OutputFilter;
 		$scanner = new Scanimage();
@@ -114,7 +114,7 @@ public static function HandleFileListRequest() {
 		$outdir = System::OutputDirectory();
 
 		foreach (new DirectoryIterator($outdir) as $fileinfo) {
-			if(!is_dir($outdir.$fileinfo) && $fileinfo->getExtension() === Config::OutputExtention) {    
+			if(!is_dir($outdir.$fileinfo) && $fileinfo->getExtension() === Config::OutputExtension) {    
 				$files[$fileinfo->getMTime()] = $fileinfo->getFilename();
 			}
 		}

classes_php/Config.php

@@ -2,13 +2,27 @@
 class Config {
 	const IsTrace = false;
 	const TraceLineEnding = "<br>\n";
+
+	// You may need to update the paths to scanimage and convert according to 
+	// your installation.
 	const Scanimage  = "/opt/bin/scanimage";
 	const Convert  = "/opt/bin/convert";
-	const OutputFilter = "/opt/bin/convert 2>/dev/null  - -normalize -sharpen 0x1 ";
 	const PreviewFilter = "/opt/bin/convert 2>/dev/null  - -trim -quality 30  ";
-	const OutputExtention = "jpg";
-	// const OutputExtention = "tif";
 
+	// Use an empty filter by default. The spirit of the default implementation
+	// is to create non-lossy scans with no post processing. Should you wish to 
+	// override this behaviour then change the filter which will have the scanimage
+	// output piped to it.
+	const OutputFilter = "";
+	//const OutputFilter = "/opt/bin/convert 2>/dev/null  - -normalize -sharpen 0x1 ";
+
+	// As with the output filter, the default implementation prefers non-lossy
+	// output. Should you wish you override this then you can change the output 
+	// type below
+	const OutputExtension = "tif";
+	// const OutputExtension = "jpg";
+
+	// Only useful for development debugging
 	const BypassSystemExecute = false;
 	const OutputDirectory = "./output/";
 	const PreviewDirectory = "./preview/";