From a7240c6d636836f0bca01790038d7194f519604b Mon Sep 17 00:00:00 2001
From: Bruce MacDonald <brucewmacdonald@gmail.com>
Date: Mon, 12 May 2025 16:08:42 -0700
Subject: [PATCH] models: remove unused qwen2vl processing (#10677)

---
 model/models/qwen2vl/imageproc.go      | 74 ------------------------
 model/models/qwen2vl/imageproc_test.go | 78 --------------------------
 2 files changed, 152 deletions(-)
 delete mode 100644 model/models/qwen2vl/imageproc.go
 delete mode 100644 model/models/qwen2vl/imageproc_test.go

diff --git a/model/models/qwen2vl/imageproc.go b/model/models/qwen2vl/imageproc.go
deleted file mode 100644
index 964b39072..000000000
--- a/model/models/qwen2vl/imageproc.go
+++ /dev/null
@@ -1,74 +0,0 @@
-package qwen2vl
-
-import (
-	"fmt"
-	"image"
-	_ "image/jpeg"
-	_ "image/png"
-	"io"
-	"math"
-
-	"github.com/ollama/ollama/model/imageproc"
-)
-
-const (
-	DefaultFactor    = 28
-	DefaultMinPixels = 56 * 56
-	DefaultMaxPixels = 14 * 14 * 4 * 1280
-)
-
-// smartResize calculates the size of the image to resize to based on the
-// factor, minPixels, and maxPixels.
-func smartResize(size image.Point, factor, minPixels, maxPixels int) image.Point {
-	// 1. Both dimensions of size are divisible by factor
-	// 2. The area of the image is between minPixels and maxPixels
-	// 3. The aspect ratio of the image is as close to 1:1 as possible
-
-	if size.Y < factor || size.X < factor {
-		panic("image is too small to resize")
-	} else if max(size.X, size.Y)/min(size.X, size.Y) > 200 {
-		panic("aspect ratio must be less than 200:1")
-	}
-
-	f := float64(factor)
-	width := float64(size.X)
-	height := float64(size.Y)
-
-	xBar := math.Round(width/f) * f
-	yBar := math.Round(height/f) * f
-
-	if xBar*yBar > float64(maxPixels) {
-		beta := math.Sqrt(height * width / float64(maxPixels))
-		xBar = math.Floor(width/beta/f) * f
-		yBar = math.Floor(height/beta/f) * f
-	} else if xBar*yBar < float64(minPixels) {
-		beta := math.Sqrt(float64(minPixels) / (height * width))
-		xBar = math.Ceil(width*beta/f) * f
-		yBar = math.Ceil(height*beta/f) * f
-	}
-
-	return image.Point{int(xBar), int(yBar)}
-}
-
-func resizeImage(img image.Image, format string, size image.Point) image.Image {
-	if format == "png" {
-		img = imageproc.Composite(img)
-	}
-
-	return imageproc.Resize(img, size, imageproc.ResizeBilinear)
-}
-
-func Preprocess(imageData io.Reader) ([]float32, map[string]any, error) {
-	img, format, err := image.Decode(imageData)
-	if err != nil {
-		return nil, nil, fmt.Errorf("failed to decode image: %w", err)
-	}
-
-	size := smartResize(img.Bounds().Max, DefaultFactor, DefaultMinPixels, DefaultMaxPixels)
-	img = resizeImage(img, format, size)
-
-	data := imageproc.Normalize(img, imageproc.ClipDefaultMean, imageproc.ClipDefaultSTD, true, true)
-
-	opts := map[string]any{}
-	return data, opts, nil
-}
diff --git a/model/models/qwen2vl/imageproc_test.go b/model/models/qwen2vl/imageproc_test.go
deleted file mode 100644
index 817b61a5c..000000000
--- a/model/models/qwen2vl/imageproc_test.go
+++ /dev/null
@@ -1,78 +0,0 @@
-package qwen2vl
-
-import (
-	"bytes"
-	"image"
-	"image/png"
-	"testing"
-)
-
-func TestSmartResize(t *testing.T) {
-	type smartResizeCase struct {
-		TestImage image.Image
-		Expected  image.Point
-	}
-
-	cases := []smartResizeCase{
-		{
-			TestImage: image.NewRGBA(image.Rect(0, 0, 1024, 1024)),
-			Expected:  image.Point{980, 980},
-		},
-		{
-			TestImage: image.NewRGBA(image.Rect(0, 0, 1024, 768)),
-			Expected:  image.Point{1036, 756},
-		},
-		{
-			TestImage: image.NewRGBA(image.Rect(0, 0, 2000, 2000)),
-			Expected:  image.Point{980, 980},
-		},
-	}
-
-	for _, c := range cases {
-		b := c.TestImage.Bounds().Max
-		actual := smartResize(b, DefaultFactor, DefaultMinPixels, DefaultMaxPixels)
-		if actual != c.Expected {
-			t.Errorf("expected: %v, actual: %v", c.Expected, actual)
-		}
-	}
-}
-
-func TestPreprocess(t *testing.T) {
-	type preprocessCase struct {
-		TestImage   image.Image
-		ExpectedLen int
-	}
-
-	cases := []preprocessCase{
-		{
-			TestImage:   image.NewRGBA(image.Rect(0, 0, 256, 256)),
-			ExpectedLen: 252 * 252 * 3 * 1,
-		},
-		{
-			TestImage:   image.NewRGBA(image.Rect(0, 0, 2000, 2000)),
-			ExpectedLen: 980 * 980 * 3 * 1,
-		},
-	}
-
-	for _, c := range cases {
-		var buf bytes.Buffer
-		err := png.Encode(&buf, c.TestImage)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		imgData, _, err := Preprocess(&buf)
-		if err != nil {
-			t.Fatalf("error processing: %q", err)
-		}
-
-		switch len(imgData) {
-		case 0:
-			t.Errorf("no image data returned")
-		case c.ExpectedLen:
-			// ok
-		default:
-			t.Errorf("unexpected image data length: %d, expected: %d", len(imgData), c.ExpectedLen)
-		}
-	}
-}