Merge pull request #1157 from Wanglongzhi2001/master

feat: add adjust_contrast, adjust_hue, combined_non_max_suppression, crop_and_resize image oprs

src/TensorFlowNET.Core/APIs/tf.image.cs

@@ -14,6 +14,10 @@
    limitations under the License.
 ******************************************************************************/
 
+using OneOf.Types;
+using System;
+using System.Buffers.Text;
+using Tensorflow.Contexts;
 using static Tensorflow.Binding;
 
 namespace Tensorflow
@@ -162,17 +166,108 @@ namespace Tensorflow
             public Tensor sobel_edges(Tensor image)
                 => image_ops_impl.sobel_edges(image);
 
-            public Tensor decode_jpeg(Tensor contents,
-                        int channels = 0,
-                        int ratio = 1,
-                        bool fancy_upscaling = true,
-                        bool try_recover_truncated = false,
-                        int acceptable_fraction = 1,
-                        string dct_method = "",
-                        string name = null)
-                => gen_image_ops.decode_jpeg(contents, channels: channels, ratio: ratio,
-                    fancy_upscaling: fancy_upscaling, try_recover_truncated: try_recover_truncated,
-                    acceptable_fraction: acceptable_fraction, dct_method: dct_method);
+            /// <summary>
+            /// Adjust contrast of RGB or grayscale images.
+            /// </summary>
+            /// <param name="images">Images to adjust.  At least 3-D.</param>
+            /// <param name="contrast_factor"></param>
+            /// <param name="name">A float multiplier for adjusting contrast.</param>
+            /// <returns>The contrast-adjusted image or images.</returns>
+            public Tensor adjust_contrast(Tensor images, float contrast_factor, string name = null)
+                => gen_image_ops.adjust_contrastv2(images, contrast_factor, name);
+
+            /// <summary>
+            /// Adjust hue of RGB images.
+            /// </summary>
+            /// <param name="images">RGB image or images. The size of the last dimension must be 3.</param>
+            /// <param name="delta">float.  How much to add to the hue channel.</param>
+            /// <param name="name">A name for this operation (optional).</param>
+            /// <returns>Adjusted image(s), same shape and DType as `image`.</returns>
+            /// <exception cref="ValueError">if `delta` is not in the interval of `[-1, 1]`.</exception>
+            public Tensor adjust_hue(Tensor images, float delta, string name = null)
+            {
+                if (tf.Context.executing_eagerly())
+                {
+                    if (delta < -1f || delta > 1f)
+                        throw new ValueError("delta must be in the interval [-1, 1]");
+                }
+                return gen_image_ops.adjust_hue(images, delta, name: name);
+            }
+
+            /// <summary>
+            /// Adjust saturation of RGB images.
+            /// </summary>
+            /// <param name="image">RGB image or images. The size of the last dimension must be 3.</param>
+            /// <param name="saturation_factor">float. Factor to multiply the saturation by.</param>
+            /// <param name="name">A name for this operation (optional).</param>
+            /// <returns>Adjusted image(s), same shape and DType as `image`.</returns>
+            public Tensor adjust_saturation(Tensor image, float saturation_factor, string name = null)
+                => gen_image_ops.adjust_saturation(image, saturation_factor, name);
+
+            /// <summary>
+            /// Greedily selects a subset of bounding boxes in descending order of score.
+            /// </summary>
+            /// <param name="boxes">
+            /// A 4-D float `Tensor` of shape `[batch_size, num_boxes, q, 4]`. If `q` 
+            /// is 1 then same boxes are used for all classes otherwise, if `q` is equal 
+            /// to number of classes, class-specific boxes are used.
+            /// </param>
+            /// <param name="scores">
+            /// A 3-D float `Tensor` of shape `[batch_size, num_boxes, num_classes]` 
+            /// representing a single score corresponding to each box(each row of boxes).
+            /// </param>
+            /// <param name="max_output_size_per_class">
+            /// A scalar integer `Tensor` representing the 
+            /// maximum number of boxes to be selected by non-max suppression per class
+            /// </param>
+            /// <param name="max_total_size">
+            /// A int32 scalar representing maximum number of boxes retained 
+            /// over all classes.Note that setting this value to a large number may 
+            /// result in OOM error depending on the system workload.
+            /// </param>
+            /// <param name="iou_threshold">
+            /// A float representing the threshold for deciding whether boxes 
+            /// overlap too much with respect to IOU.
+            /// </param>
+            /// <param name="score_threshold">
+            /// A float representing the threshold for deciding when to 
+            /// remove boxes based on score.
+            /// </param>
+            /// <param name="pad_per_class">
+            /// If false, the output nmsed boxes, scores and classes are 
+            /// padded/clipped to `max_total_size`. If true, the output nmsed boxes, scores and classes are padded to be of length `max_size_per_class`*`num_classes`, 
+            /// unless it exceeds `max_total_size` in which case it is clipped to `max_total_size`. Defaults to false.
+            /// </param>
+            /// <param name="clip_boxes">
+            /// If true, the coordinates of output nmsed boxes will be clipped 
+            /// to[0, 1]. If false, output the box coordinates as it is. Defaults to true.
+            /// </param>
+            /// <returns>
+            /// 'nmsed_boxes': A [batch_size, max_detections, 4] float32 tensor containing the non-max suppressed boxes.
+            /// 'nmsed_scores': A [batch_size, max_detections] float32 tensor containing the scores for the boxes.
+            /// 'nmsed_classes': A [batch_size, max_detections] float32 tensor containing the class for boxes.
+            /// 'valid_detections': A [batch_size] int32 tensor indicating the number of
+            ///     valid detections per batch item. Only the top valid_detections[i] entries
+            ///     in nms_boxes[i], nms_scores[i] and nms_class[i] are valid. The rest of the
+            ///     entries are zero paddings.
+            /// </returns>
+            public (Tensor, Tensor, Tensor, Tensor) combined_non_max_suppression(
+                        Tensor boxes, 
+                        Tensor scores, 
+                        int max_output_size_per_class, 
+                        int max_total_size,
+                        float iou_threshold,
+                        float score_threshold,
+                        bool pad_per_class = false,
+                        bool clip_boxes = true)
+            {
+                var iou_threshold_t = ops.convert_to_tensor(iou_threshold, TF_DataType.TF_FLOAT, name: "iou_threshold");
+                var score_threshold_t = ops.convert_to_tensor(score_threshold, TF_DataType.TF_FLOAT, name: "score_threshold");
+                var max_total_size_t = ops.convert_to_tensor(max_total_size);
+                var max_output_size_per_class_t = ops.convert_to_tensor(max_output_size_per_class);
+                return gen_image_ops.combined_non_max_suppression(boxes, scores, max_output_size_per_class_t, max_total_size_t,
+                                       iou_threshold_t, score_threshold_t, pad_per_class, clip_boxes);
+            }
 
             /// <summary>
             /// Extracts crops from the input image tensor and resizes them using bilinear sampling or nearest neighbor sampling (possibly with aspect ratio change) to a common output size specified by crop_size. This is more general than the crop_to_bounding_box op which extracts a fixed size slice from the input image and does not allow resizing or aspect ratio change.
@@ -187,7 +282,19 @@ namespace Tensorflow
             /// <param name="name">A name for the operation (optional).</param>
             /// <returns>A 4-D tensor of shape [num_boxes, crop_height, crop_width, depth].</returns>
             public Tensor crop_and_resize(Tensor image, Tensor boxes, Tensor box_ind, Tensor crop_size, string method = "bilinear", float extrapolation_value = 0f, string name = null) =>
-                image_ops_impl.crop_and_resize(image, boxes, box_ind, crop_size, method, extrapolation_value, name);
+                gen_image_ops.crop_and_resize(image, boxes, box_ind, crop_size, method, extrapolation_value, name);
+
+            public Tensor decode_jpeg(Tensor contents,
+                        int channels = 0,
+                        int ratio = 1,
+                        bool fancy_upscaling = true,
+                        bool try_recover_truncated = false,
+                        int acceptable_fraction = 1,
+                        string dct_method = "",
+                        string name = null)
+                => gen_image_ops.decode_jpeg(contents, channels: channels, ratio: ratio,
+                    fancy_upscaling: fancy_upscaling, try_recover_truncated: try_recover_truncated,
+                    acceptable_fraction: acceptable_fraction, dct_method: dct_method);
 
             public Tensor extract_glimpse(Tensor input, Tensor size, Tensor offsets, bool centered = true, bool normalized = true,
                 bool uniform_noise = true, string name = null)

src/TensorFlowNET.Core/Operations/gen_image_ops.cs

@@ -16,18 +16,312 @@
 
 using System;
 using System.Linq;
+using Tensorflow.Eager;
 using static Tensorflow.Binding;
+using Tensorflow.Exceptions;
+using Tensorflow.Contexts;
+using System.Xml.Linq;
+using Google.Protobuf;
 
 namespace Tensorflow
 {
     public class gen_image_ops
     {
+        public static Tensor adjust_contrastv2(Tensor images, Tensor contrast_factor, string name = null)
+        {
+            var _ctx = tf.Context;
+            if (_ctx.executing_eagerly())
+            {
+                try
+                {
+                    var _fast_path_result = tf.Runner.TFE_FastPathExecute(new FastPathOpExecInfo(_ctx, "AdjustContrastv2", name) { 
+                                                args = new object[] { images, contrast_factor }, attrs = new Dictionary<string, object>() { } });
+                    return _fast_path_result[0];
+                }
+                catch (NotOkStatusException ex)
+                {
+                    throw ex;
+                }
+                catch (Exception)
+                {
+                }
+                try
+                {
+                    return adjust_contrastv2_eager_fallback(images, contrast_factor, name: name, ctx: _ctx);
+                }
+                catch (Exception)
+                {
+                }
+            }
+            Dictionary<string, object> keywords = new();
+            keywords["images"] = images;
+            keywords["contrast_factor"] = contrast_factor;
+            var _op = tf.OpDefLib._apply_op_helper("AdjustContrastv2", name, keywords);
+            var _result = _op.outputs;
+            if (_execute.must_record_gradient())
+            {
+                object[] _attrs = new object[] { "T", _op._get_attr_type("T") };
+                _execute.record_gradient("AdjustContrastv2", _op.inputs, _attrs, _result);
+            }
+            return _result[0];
+        }
+        public static Tensor adjust_contrastv2(Tensor image, float contrast_factor, string name = null)
+        {
+            return adjust_contrastv2(image, tf.convert_to_tensor(contrast_factor), name: name);
+        }
+
+        public static Tensor adjust_contrastv2_eager_fallback(Tensor images, Tensor contrast_factor, string name, Context ctx)
+        {
+            Tensor[] _inputs_flat = new Tensor[] { images, contrast_factor};
+            object[] _attrs = new object[] { "T", images.dtype };
+            var _result = _execute.execute("AdjustContrastv2", 1, inputs: _inputs_flat, attrs: _attrs, ctx: ctx, name: name);
+            if (_execute.must_record_gradient())
+            {
+                _execute.record_gradient("AdjustContrastv2", _inputs_flat, _attrs, _result);
+            }
+            return _result[0];
+        }
+
+        public static Tensor adjust_hue(Tensor images, Tensor delta, string name = null)
+        {
+            var _ctx = tf.Context;
+            if (_ctx.executing_eagerly())
+            {
+                try
+                {
+                    var _fast_path_result = tf.Runner.TFE_FastPathExecute(new FastPathOpExecInfo(_ctx, "AdjustHue", name) { 
+                                                args = new object[] { images, delta }, attrs = new Dictionary<string, object>() { } });
+                    return _fast_path_result[0];
+                }
+                catch (NotOkStatusException ex)
+                {
+                    throw ex;
+                }
+                catch (Exception)
+                {
+                }
+                try
+                {
+                    return adjust_hue_eager_fallback(images, delta, name: name, ctx: _ctx);
+                }
+                catch (Exception)
+                {
+                }
+            }
+            Dictionary<string, object> keywords = new();
+            keywords["images"] = images;
+            keywords["delta"] = delta;
+            var _op = tf.OpDefLib._apply_op_helper("AdjustHue", name, keywords);
+            var _result = _op.outputs;
+            if (_execute.must_record_gradient())
+            {
+                object[] _attrs = new object[] { "T", _op._get_attr_type("T") };
+                _execute.record_gradient("AdjustHue", _op.inputs, _attrs, _result);
+            }
+            return _result[0];
+        }
+
+        public static Tensor adjust_hue(Tensor images, float delta, string name = null)
+            => adjust_hue(images, delta, name: name);
+
+        public static Tensor adjust_hue_eager_fallback(Tensor images, Tensor delta, string name, Context ctx)
+        {
+            Tensor[] _inputs_flat = new Tensor[] { images, delta};
+            object[] _attrs = new object[] { "T", images.dtype };
+            var _result = _execute.execute("AdjustHue", 1, inputs: _inputs_flat, attrs: _attrs, ctx: ctx, name: name);
+            if (_execute.must_record_gradient())
+            {
+                _execute.record_gradient("AdjustHue", _inputs_flat, _attrs, _result);
+            }
+            return _result[0];
+        } 
+
+        public static Tensor adjust_saturation(Tensor images, Tensor scale, string name = null)
+        {
+            var _ctx = tf.Context;
+            if (_ctx.executing_eagerly())
+            {
+                try
+                {
+                    var _fast_path_result = tf.Runner.TFE_FastPathExecute(new FastPathOpExecInfo(_ctx, "AdjustSaturation", name)
+                    {
+                        args = new object[] { images, scale },
+                        attrs = new Dictionary<string, object>() { }
+                    });
+                    return _fast_path_result[0];
+                }
+                catch (NotOkStatusException ex)
+                {
+                    throw ex;
+                }
+                catch (Exception)
+                {
+                }
+                try
+                {
+                    return adjust_hue_eager_fallback(images, scale, name: name, ctx: _ctx);
+                }
+                catch (Exception)
+                {
+                }
+            }
+            Dictionary<string, object> keywords = new();
+            keywords["images"] = images;
+            keywords["scale"] = scale;
+            var _op = tf.OpDefLib._apply_op_helper("AdjustSaturation", name, keywords);
+            var _result = _op.outputs;
+            if (_execute.must_record_gradient())
+            {
+                object[] _attrs = new object[] { "T", _op._get_attr_type("T") };
+                _execute.record_gradient("AdjustSaturation", _op.inputs, _attrs, _result);
+            }
+            return _result[0];
+        }
+
+        public static Tensor adjust_saturation(Tensor images, float scale, string name = null)
+            => adjust_saturation(images, ops.convert_to_tensor(scale), name: name);
+
+        public static Tensor adjust_saturation_eager_fallback(Tensor images, Tensor scale, string name, Context ctx)
+        {
+            Tensor[] _inputs_flat = new Tensor[] { images, scale };
+            object[] _attrs = new object[] { "T", images.dtype };
+            var _result = _execute.execute("AdjustSaturation", 1, inputs: _inputs_flat, attrs: _attrs, ctx: ctx, name: name);
+            if (_execute.must_record_gradient())
+            {
+                _execute.record_gradient("AdjustSaturation", _inputs_flat, _attrs, _result);
+            }
+            return _result[0];
+        }
+
         public static (Tensor, Tensor, Tensor, Tensor) combined_non_max_suppression(Tensor boxes, Tensor scores, Tensor max_output_size_per_class, Tensor max_total_size,
-            Tensor iou_threshold, Tensor score_threshold, bool pad_per_class, bool clip_boxes)
+            Tensor iou_threshold, Tensor score_threshold, bool pad_per_class = false, bool clip_boxes = true, string name = null)
         {
-            throw new NotImplementedException("combined_non_max_suppression");
+            var _ctx = tf.Context;
+            if (_ctx.executing_eagerly())
+            {
+                try
+                {
+                    var _fast_path_result = tf.Runner.TFE_FastPathExecute(new FastPathOpExecInfo(_ctx, "CombinedNonMaxSuppression", name){
+                            args = new object[] {
+                                boxes, scores, max_output_size_per_class, max_total_size, iou_threshold, score_threshold,
+                                "pad_per_class", pad_per_class, "clip_boxes", clip_boxes},
+                            attrs = new Dictionary<string, object>() { }});
+                    return (_fast_path_result[0], _fast_path_result[1], _fast_path_result[2], _fast_path_result[3]);
+                }
+                catch (NotOkStatusException ex)
+                {
+                    throw ex;
+                }
+                catch (Exception)
+                {
+                }
+                try
+                {
+                    return combined_non_max_suppression_eager_fallback(
+                        boxes, scores, max_output_size_per_class, max_total_size, iou_threshold, 
+                        score_threshold, pad_per_class, clip_boxes, name, ctx: _ctx);
+                }
+                catch (Exception)
+                {
+                }
+            }
+            Dictionary<string, object> keywords = new();
+            keywords["boxes"] = boxes;
+            keywords["scores"] = scores;
+            keywords["max_output_size_per_class"] = max_output_size_per_class;
+            keywords["max_total_size"] = max_total_size;
+            keywords["iou_threshold"] = iou_threshold;
+            keywords["score_threshold"] = score_threshold;
+            keywords["pad_per_class"] = pad_per_class;
+            keywords["clip_boxes"] = clip_boxes;
+
+            var _op = tf.OpDefLib._apply_op_helper("CombinedNonMaxSuppression", name, keywords);
+            var _result = _op.outputs;
+            if (_execute.must_record_gradient())
+            {
+                object[] _attrs = new object[] { "pad_per_class", _op._get_attr_type("pad_per_class") ,"clip_boxes", _op._get_attr_type("clip_boxes")};
+                _execute.record_gradient("CombinedNonMaxSuppression", _op.inputs, _attrs, _result);
+            }
+            return (_result[0], _result[1], _result[2], _result[3]);
         }
 
+        public static (Tensor, Tensor, Tensor, Tensor) combined_non_max_suppression_eager_fallback(Tensor boxes, Tensor scores, Tensor max_output_size_per_class, Tensor max_total_size,
+            Tensor iou_threshold, Tensor score_threshold, bool pad_per_class, bool clip_boxes, string name, Context ctx)
+        {
+            Tensor[] _inputs_flat = new Tensor[] { boxes, scores, max_output_size_per_class, max_total_size, iou_threshold, score_threshold };
+            object[] _attrs = new object[] { "pad_per_class", pad_per_class, "clip_boxes", clip_boxes };
+            var _result = _execute.execute("CombinedNonMaxSuppression", 1, inputs: _inputs_flat, attrs: _attrs, ctx: ctx, name: name);
+            if (_execute.must_record_gradient())
+            {
+                _execute.record_gradient("CombinedNonMaxSuppression", _inputs_flat, _attrs, _result);
+            }
+            return (_result[0], _result[1], _result[2], _result[3]);
+        }
+
+        public static Tensor crop_and_resize(Tensor image, Tensor boxes, Tensor box_ind, Tensor crop_size, string method = "bilinear", float extrapolation_value = 0f, string name = null)
+        {
+            var _ctx = tf.Context;
+            if (_ctx.executing_eagerly())
+            {
+                try
+                {
+                    var _fast_path_result = tf.Runner.TFE_FastPathExecute(new FastPathOpExecInfo(_ctx, "CropAndResize", name) { 
+                        args = new object[] { 
+                            image, boxes, box_ind, crop_size, "method", method, "extrapolation_value", extrapolation_value }, attrs = new Dictionary<string, object>() { } });
+                    return _fast_path_result[0];
+                }
+                catch (NotOkStatusException ex)
+                {
+                    throw ex;
+                }
+                catch (Exception)
+                {
+                }
+                try
+                {
+                    return crop_and_resize_eager_fallback(
+                        image, boxes, box_ind, crop_size, method: method, extrapolation_value: extrapolation_value, name: name, ctx: _ctx);
+                }
+                catch (Exception)
+                {
+                }
+            }
+            Dictionary<string, object> keywords = new();
+            keywords["image"] = image;
+            keywords["boxes"] = boxes;
+            keywords["box_ind"] = box_ind;
+            keywords["crop_size"] = crop_size;
+            keywords["method"] = method;
+            keywords["extrapolation_value"] = extrapolation_value;
+            var _op = tf.OpDefLib._apply_op_helper("CropAndResize", name, keywords);
+            var _result = _op.outputs;
+            if (_execute.must_record_gradient())
+            {
+                object[] _attrs = new object[] { "T", _op._get_attr_type("T") ,"method", _op._get_attr_type("method") ,
+                                                "extrapolation_value", _op.get_attr("extrapolation_value")};
+                _execute.record_gradient("CropAndResize", _op.inputs, _attrs, _result);
+            }
+            return _result[0];
+        }
+
+        public static Tensor crop_and_resize_eager_fallback(Tensor image, Tensor boxes, Tensor box_ind, Tensor crop_size, string method, float extrapolation_value, string name, Context ctx)
+        {
+            if (method is null)
+                method = "bilinear";
+            //var method_cpmpat = ByteString.CopyFromUtf8(method ?? string.Empty);
+            //var extrapolation_value_float = (float)extrapolation_value;
+
+            Tensor[] _inputs_flat = new Tensor[] { image, boxes, box_ind, crop_size, tf.convert_to_tensor(method), tf.convert_to_tensor(extrapolation_value) };
+            object[] _attrs = new object[] { "T", image.dtype };
+            var _result = _execute.execute("CropAndResize", 1, inputs: _inputs_flat, attrs: _attrs, ctx: ctx, name: name);
+            if (_execute.must_record_gradient())
+            {
+                _execute.record_gradient("CropAndResize", _inputs_flat, _attrs, _result);
+            }
+            return _result[0];
+        }
+
+
         public static Tensor convert_image_dtype(Tensor image, TF_DataType dtype, bool saturate = false, string name = null)
         {
             if (dtype == image.dtype)

test/TensorFlowNET.Graph.UnitTest/ImageTest.cs

@@ -3,6 +3,7 @@ using Tensorflow.NumPy;
 using System.Linq;
 using Tensorflow;
 using static Tensorflow.Binding;
+using System;
 
 namespace TensorFlowNET.UnitTest
 {
@@ -22,13 +23,86 @@ namespace TensorFlowNET.UnitTest
             contents = tf.io.read_file(imgPath);
         }
 
+        [TestMethod]
+        public void adjust_contrast()
+        {
+            var input = np.array(0f, 1f, 2f, 3f, 4f, 5f, 6f, 7f, 8f);
+            var image = tf.reshape(input, new int[] { 3, 3, 1 });
+
+            var init = tf.global_variables_initializer();
+            var sess = tf.Session();
+            sess.run(init);
+            var adjust_contrast = tf.image.adjust_contrast(image, 2.0f);
+            var result = sess.run(adjust_contrast);
+            var res = np.array(-4f, -2f, 0f, 2f, 4f, 6f, 8f, 10f, 12f).reshape((3,3,1));
+            Assert.AreEqual(result.numpy(), res);
+        }
+
+        [Ignore]
+        [TestMethod]
+        public void adjust_hue()
+        {
+            var image = tf.constant(new int[] {1,2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,16,17,18});
+            image = tf.reshape(image, new int[] { 3, 2, 3 });
+            var adjusted_image = tf.image.adjust_hue(image, 0.2f);
+            var res = tf.constant(new int[] {2,1,3, 4, 5, 6,8,7,9,11,10,12,14,13,15,17,16,18});
+            res = tf.reshape(res,(3,2,3));
+            Assert.AreEqual(adjusted_image, res);
+        }
+
+        [TestMethod]
+        public void combined_non_max_suppression()
+        {
+            var boxesX = tf.constant(new float[,] { { 200, 100, 150, 100 }, { 220, 120, 150, 100 }, { 190, 110, 150, 100 }, { 210, 112, 150, 100 } });
+            var boxes1 = tf.reshape(boxesX, (1, 4, 1, 4));
+            var scoresX = tf.constant(new float[,] { { 0.2f, 0.7f, 0.1f }, { 0.1f, 0.8f, 0.1f }, { 0.3f, 0.6f, 0.1f }, { 0.05f, 0.9f, 0.05f } });
+            var scores1 = tf.reshape(scoresX, (1, 4, 3));
+
+            var init = tf.global_variables_initializer();
+            var sess = tf.Session();
+            sess.run(init);
+
+            var (boxes, scores, classes, valid_detections) = tf.image.combined_non_max_suppression(boxes1, scores1, 10, 10, 0.5f, 0.2f, clip_boxes: false);
+            var result = sess.run((boxes, scores, classes, valid_detections));
+
+            var boxes_gt = tf.constant(new float[,] { { 210f, 112f, 150f, 100f }, { 200f, 100f, 150f, 100f }, { 190f, 110f, 150f, 100f },
+                { 0f, 0f, 0f, 0f},{ 0f, 0f, 0f, 0f},{ 0f, 0f, 0f, 0f},{ 0f, 0f, 0f , 0f},{ 0f, 0f, 0f, 0f},{ 0f , 0f, 0f, 0f},{ 0f, 0f, 0f, 0f} });
+            boxes_gt = tf.reshape(boxes_gt, (1, 10, 4));
+            Assert.AreEqual(result.Item1.numpy(), boxes_gt.numpy());
+            var scores_gt = tf.constant(new float[,] { { 0.9f, 0.7f, 0.3f, 0f, 0f, 0f, 0f, 0f, 0f, 0f } });
+            scores_gt = tf.reshape(scores_gt, (1, 10));
+            Assert.AreEqual(result.Item2.numpy(), scores_gt.numpy());
+            var classes_gt = tf.constant(new float[,] { { 1f, 1f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f } });
+            classes_gt = tf.reshape(classes_gt, (1, 10));
+            Assert.AreEqual(result.Item3.numpy(), classes_gt.numpy());
+            var valid_detections_gt = tf.constant(new int[,] { { 3 } });
+            valid_detections_gt = tf.reshape(valid_detections_gt, (1));
+            Assert.AreEqual(result.Item4.numpy(), valid_detections_gt.numpy());
+        }
+
+        [TestMethod]
+        public void crop_and_resize()
+        {
+            int BATCH_SIZE = 1;
+            int NUM_BOXES = 5;
+            int IMAGE_HEIGHT = 256;
+            int IMAGE_WIDTH = 256;
+            int CHANNELS = 3;
+            var crop_size = tf.constant(new int[] { 24, 24 });
+            var image = tf.random.uniform((BATCH_SIZE, IMAGE_HEIGHT, IMAGE_WIDTH, CHANNELS));
+            var boxes = tf.random.uniform((NUM_BOXES, 4));
+            var box_ind = tf.random.uniform((NUM_BOXES), minval: 0, maxval: BATCH_SIZE, dtype: TF_DataType.TF_INT32);
+            var output = tf.image.crop_and_resize(image, boxes, box_ind, crop_size);
+            Assert.AreEqual((5,24,24,3), output.shape);
+        }
+
         [TestMethod]
         public void decode_image()
         {
             var img = tf.image.decode_image(contents);
             Assert.AreEqual(img.name, "decode_image/DecodeImage:0");
         }
-
+            
         [TestMethod]
         public void resize_image()
         {