diff --git a/.gitignore b/.gitignore
index a552964..5714632 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@
 vendor/
 glide.lock
 .idea/
+image/test_result
\ No newline at end of file
diff --git a/README.md b/README.md
index 364d47c..f8dee36 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,17 @@
 #### 文本审核
 - [ ] 通用类文本反作弊
 
+### 图像增强与特效
+
+#### 图像特效
+- [x] 黑白图片上色
+
+#### 图像增强
+- [x] 图像对比度增强
+- [x] 图像无损放大
+- [x] 图像清晰度增强
+- [x] 图像色彩增强
+
 
 # LISENCE
 the project is licensed under the [Apache License 2.0](https://github.com/chenqinghe/baidu-ai-go-sdk/blob/master/LICENSE) 
diff --git a/example/image/enhance_01.jpg b/example/image/enhance_01.jpg
new file mode 100644
index 0000000..04677a8
Binary files /dev/null and b/example/image/enhance_01.jpg differ
diff --git a/go.mod b/go.mod
index 9ecd97a..e2af284 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,7 @@ module github.com/chenqinghe/baidu-ai-go-sdk
 
 go 1.13
 
-require github.com/imroc/req v0.2.4
+require (
+	github.com/imroc/req v0.2.4
+	github.com/stretchr/testify v1.9.0
+)
diff --git a/go.sum b/go.sum
index 497e9af..5941e13 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,21 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/imroc/req v0.2.4 h1:8XbvaQpERLAJV6as/cB186DtH5f0m5zAOtHEaTQ4ac0=
 github.com/imroc/req v0.2.4/go.mod h1:J9FsaNHDTIVyW/b5r6/Df5qKEEEq2WzZKIgKSajd1AE=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/image/client.go b/image/client.go
new file mode 100644
index 0000000..6ccea41
--- /dev/null
+++ b/image/client.go
@@ -0,0 +1,70 @@
+package image
+
+import (
+	"context"
+	"fmt"
+	gosdk "github.com/chenqinghe/baidu-ai-go-sdk"
+	"github.com/imroc/req"
+	"net/http"
+)
+
+type ImageClient struct {
+	*gosdk.Client
+}
+
+func NewEnhanceClient(apiKey, secretKey string) *ImageClient {
+	return &ImageClient{
+		Client: gosdk.NewClient(apiKey, secretKey),
+	}
+}
+
+func (e *ImageClient) requestUrl(url string) (string, error) {
+	if err := e.Auth(); err != nil {
+		return "", err
+	}
+
+	return fmt.Sprintf("%s?access_token=%s", url, e.AccessToken), nil
+}
+
+func (e *ImageClient) posUrlEncode(ctx context.Context, url string,
+	inputParam *Input, maxSize int) (*EnhanceResponse, error) {
+	options, err := inputParam.encode(maxSize)
+	if err != nil {
+		return nil, err
+	}
+
+	url, err = e.requestUrl(url)
+	if err != nil {
+		return nil, err
+	}
+
+	header := req.Header{
+		"Content-Type": "application/x-www-form-urlencoded",
+	}
+
+	resp, err := req.
+		Post(url, req.Param(options), header, ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.Response().StatusCode != http.StatusOK {
+		return nil, APIError{
+			ErrorCode:  0,
+			ErrorMsg:   resp.String(),
+			StatusCode: resp.Response().Status,
+		}
+	}
+
+	var response generalResponse
+	err = resp.ToJSON(&response)
+	if err != nil {
+		return nil, fmt.Errorf("decode enhance response: %w", err)
+	}
+
+	if response.success() {
+		return &response.EnhanceResponse, nil
+	}
+
+	return nil, response.APIError
+}
diff --git a/image/const.go b/image/const.go
new file mode 100644
index 0000000..11a2f71
--- /dev/null
+++ b/image/const.go
@@ -0,0 +1,16 @@
+package image
+
+import "github.com/chenqinghe/baidu-ai-go-sdk/voice"
+
+const (
+	urlContrastEnhance   = "https://aip.baidubce.com/rest/2.0/image-process/v1/contrast_enhance"
+	urlColorEnhance      = "https://aip.baidubce.com/rest/2.0/image-process/v1/color_enhance"
+	urlColorize          = "https://aip.baidubce.com/rest/2.0/image-process/v1/colourize"
+	urlQualityEnhance    = "https://aip.baidubce.com/rest/2.0/image-process/v1/image_quality_enhance"
+	urlDefinitionEnhance = "https://aip.baidubce.com/rest/2.0/image-process/v1/image_definition_enhance"
+)
+
+const (
+	image8M = 8 * voice.MB
+	image4M = 4 * voice.MB
+)
diff --git a/image/effect.go b/image/effect.go
new file mode 100644
index 0000000..bc86a4f
--- /dev/null
+++ b/image/effect.go
@@ -0,0 +1,7 @@
+package image
+
+import "context"
+
+func (e *ImageClient) Colourize(ctx context.Context, param *Input) (*EnhanceResponse, error) {
+	return e.posUrlEncode(ctx, urlColorize, param, image8M)
+}
diff --git a/image/enhance.go b/image/enhance.go
new file mode 100644
index 0000000..b6d6b27
--- /dev/null
+++ b/image/enhance.go
@@ -0,0 +1,22 @@
+package image
+
+import (
+	"context"
+)
+
+// ContrastEnhance https://ai.baidu.com/ai-doc/IMAGEPROCESS/ek3bclnzn
+func (e *ImageClient) ContrastEnhance(ctx context.Context, param *Input) (*EnhanceResponse, error) {
+	return e.posUrlEncode(ctx, urlContrastEnhance, param, image8M)
+}
+
+func (e *ImageClient) ColorEnhance(ctx context.Context, param *Input) (*EnhanceResponse, error) {
+	return e.posUrlEncode(ctx, urlColorEnhance, param, image8M)
+}
+
+func (e *ImageClient) QualityEnhance(ctx context.Context, param *Input) (*EnhanceResponse, error) {
+	return e.posUrlEncode(ctx, urlQualityEnhance, param, image4M)
+}
+
+func (e *ImageClient) DefinitionEnhance(ctx context.Context, param *Input) (*EnhanceResponse, error) {
+	return e.posUrlEncode(ctx, urlDefinitionEnhance, param, image8M)
+}
diff --git a/image/enhance_test.go b/image/enhance_test.go
new file mode 100644
index 0000000..baa2af4
--- /dev/null
+++ b/image/enhance_test.go
@@ -0,0 +1,110 @@
+package image
+
+import (
+	"bytes"
+	"context"
+	"encoding/base64"
+	"github.com/stretchr/testify/require"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+var (
+	client *ImageClient
+)
+
+func preTest() {
+	if client != nil {
+		return
+	}
+	client = NewEnhanceClient(os.Getenv("BAIDU_API_KEY"),
+		os.Getenv("BAIDU_SECRET_KEY"))
+	err := os.MkdirAll("./test_result", os.ModePerm)
+	if err != nil {
+		panic(err)
+	}
+}
+
+func TestAllAPI(t *testing.T) {
+	preTest()
+
+	t.Run("contrastEnhance", TestContrastEnhance)
+
+	t.Run("color_enhance", func(t *testing.T) {
+		err := generalCall(client.ColorEnhance, &Input{
+			ImageUrl:    "https://ai.bdstatic.com/file/75F5ABC751594F55B23AC4168F4A919A",
+			File:        nil,
+			ImageBase64: "",
+		})
+		require.NoError(t, err)
+	})
+
+	t.Run("quality_enhance", func(t *testing.T) {
+		err := generalCall(client.QualityEnhance, &Input{
+			ImageUrl:    "https://ai-public-console.cdn.bcebos.com/portal-pc-static/1720085025198/images/technology/imageprocess/image_quality_enhance/1.jpg",
+			File:        nil,
+			ImageBase64: "",
+		})
+		require.NoError(t, err)
+	})
+
+	t.Run("definition_enhance", func(t *testing.T) {
+		err := generalCall(client.DefinitionEnhance, &Input{
+			ImageUrl:    "https://ai-public-console.cdn.bcebos.com/portal-pc-static/1720085025198/images/technology/imageprocess/image_definition_enhance/1-1.jpg",
+			File:        nil,
+			ImageBase64: "",
+		})
+		require.NoError(t, err)
+	})
+
+	t.Run("colourize", func(t *testing.T) {
+		err := generalCall(client.Colourize, &Input{
+			ImageUrl:    "https://ai-public-console.cdn.bcebos.com/portal-pc-static/1720085025198/images/technology/imageprocess/colourize/1.jpg",
+			File:        nil,
+			ImageBase64: "",
+		})
+		require.NoError(t, err)
+	})
+}
+
+func TestContrastEnhance(t *testing.T) {
+	preTest()
+
+	err := generalCall(client.ContrastEnhance, &Input{
+		ImageUrl:    "https://ai-public-console.cdn.bcebos.com/portal-pc-static/1720085025198/images/technology/imageprocess/contrast_enhance/1.jpg",
+		File:        nil,
+		ImageBase64: "",
+	})
+	require.NoError(t, err)
+
+	binary, err := ioutil.ReadFile("../example/image/enhance_01.jpg")
+	require.NoError(t, err)
+
+	err = generalCall(client.ContrastEnhance, &Input{
+		ImageBase64: base64.StdEncoding.EncodeToString(binary),
+	})
+	require.NoError(t, err)
+
+	err = generalCall(client.ContrastEnhance, &Input{
+		File: bytes.NewBuffer(binary),
+	})
+	require.NoError(t, err)
+
+	err = generalCall(client.ContrastEnhance, &Input{
+		ImageUrl: "https://www.baidu.com",
+	})
+	require.NotNil(t, err, err)
+}
+
+func generalCall(fn func(ctx context.Context, input *Input) (*EnhanceResponse, error), input *Input) error {
+	resp, err := fn(context.TODO(), input)
+	if err != nil {
+		return err
+	}
+	err = decodeToLocal(resp)
+	if err != nil {
+		return err
+	}
+	return nil
+}
diff --git a/image/error.go b/image/error.go
new file mode 100644
index 0000000..c81fbd2
--- /dev/null
+++ b/image/error.go
@@ -0,0 +1,22 @@
+package image
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	ErrImageTooLarge = errors.New("image to large")
+	ErrInvalidImage  = errors.New("invalid image")
+)
+
+// APIError https://ai.baidu.com/ai-doc/IMAGEPROCESS/Ek3bclpgv
+type APIError struct {
+	ErrorCode  int    `json:"error_code"`
+	ErrorMsg   string `json:"error_msg"`
+	StatusCode string `json:"-"`
+}
+
+func (e APIError) Error() string {
+	return fmt.Sprintf("%#v", e)
+}
diff --git a/image/model.go b/image/model.go
new file mode 100644
index 0000000..8142b66
--- /dev/null
+++ b/image/model.go
@@ -0,0 +1,53 @@
+package image
+
+import (
+	"encoding/base64"
+	"io"
+)
+
+// Input 三选一
+type Input struct {
+	ImageUrl    string    `json:"image_url"`
+	File        io.Reader `json:"file"`
+	ImageBase64 string    `json:"image_base_64"`
+}
+
+func (i *Input) encode(maxSize int) (map[string]interface{}, error) {
+	var invokeParam = make(map[string]interface{})
+	switch {
+	case i.File != nil:
+		binary, err := io.ReadAll(i.File)
+		if err != nil {
+			return nil, err
+		}
+		base64Encode := base64.StdEncoding.EncodeToString(binary)
+		if len(base64Encode) > maxSize {
+			return nil, ErrImageTooLarge
+		}
+		invokeParam["image"] = base64Encode
+	case i.ImageBase64 != "":
+		if len(i.ImageBase64) > maxSize {
+			return nil, ErrImageTooLarge
+		}
+		invokeParam["image"] = i.ImageBase64
+	case i.ImageUrl != "":
+		invokeParam["url"] = i.ImageUrl
+	default:
+		return nil, ErrInvalidImage
+	}
+	return invokeParam, nil
+}
+
+type EnhanceResponse struct {
+	Image string `json:"image"`
+	LogID int    `json:"log_id"`
+}
+
+type generalResponse struct {
+	EnhanceResponse
+	APIError
+}
+
+func (g *generalResponse) success() bool {
+	return g.ErrorCode == 0
+}
diff --git a/image/test_helper.go b/image/test_helper.go
new file mode 100644
index 0000000..1e9a345
--- /dev/null
+++ b/image/test_helper.go
@@ -0,0 +1,22 @@
+package image
+
+import (
+	"encoding/base64"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"time"
+)
+
+func decodeToLocal(response *EnhanceResponse) error {
+	binary, err := base64.StdEncoding.DecodeString(response.Image)
+	if err != nil {
+		panic(err)
+	}
+
+	err = ioutil.WriteFile(fmt.Sprintf("./test_result/%d.png", time.Now().UnixMilli()), binary, os.ModePerm)
+	if err != nil {
+		panic(err)
+	}
+	return nil
+}