-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 BBXM3wca64Hx8rqms5hupnu+ClF1Wb3zG1A7wowjjRDuVbhJPS4PYHIcIuwwATG+
 Tnn838q4F1jAoH2aJiUgww==

<SEC-DOCUMENT>0000901719-04-000031.txt : 20041227
<SEC-HEADER>0000901719-04-000031.hdr.sgml : 20041224
<ACCEPTANCE-DATETIME>20041227213347
ACCESSION NUMBER:		0000901719-04-000031
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040910
FILED AS OF DATE:		20041227
DATE AS OF CHANGE:		20041227

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FOCUS ENHANCEMENTS INC
		CENTRAL INDEX KEY:			0000884719
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER COMMUNICATIONS EQUIPMENT [3576]
		IRS NUMBER:				043144936
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1370 DELL AVE
		CITY:			CAMPBELL
		STATE:			CA
		ZIP:			95008
		BUSINESS PHONE:		4088668300

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HAMILTON THOMAS
		CENTRAL INDEX KEY:			0001250882

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11860
		FILM NUMBER:		041227381

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		4088668300

	MAIL ADDRESS:	
		STREET 1:		C/O FOCUS ENHANCEMENTS INC
		STREET 2:		1370 DELL AVE
		CITY:			CAMPBELL
		STATE:			CA
		ZIP:			95008
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2004-09-10</periodOfReport>

    <dateOfOriginalSubmission>2004-09-10</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000884719</issuerCik>
        <issuerName>FOCUS ENHANCEMENTS INC</issuerName>
        <issuerTradingSymbol>fcse</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001250882</rptOwnerCik>
            <rptOwnerName>HAMILTON THOMAS</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FOCUS ENHANCEMENTS INC</rptOwnerStreet1>
            <rptOwnerStreet2>1370 DELL AVE</rptOwnerStreet2>
            <rptOwnerCity>CAMPBELL</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>95008</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Exec VP and General Manager</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common stock options</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.2</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-09-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.2</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-09-10</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-09-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>424289</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Amended Form 4 filing to correct transaction code. Code M has been replaced with code A.</footnote>
        <footnote id="F2">The entire grant will vest on 9/10/2005.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Thomas Hamilton by Gary Williams, Attorney in Fact</signatureName>
        <signatureDate>2004-12-27</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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